CN103028363A - Gas desulfurization adsorbent and preparation method thereof as well as desulfurization method for sulphur-contained gas - Google Patents
Gas desulfurization adsorbent and preparation method thereof as well as desulfurization method for sulphur-contained gas Download PDFInfo
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Abstract
The invention relates to gas desulfurization adsorbent, which comprises molybdenum carbide, zinc oxide, monox source and aluminum oxide. The invention also relates to a preparation method for the gas desulfurization adsorbent and the desulfurization adsorbent prepared with the method. The method comprises the following steps of: carrying out mixing contact on molybdenum carbide, zinc oxide, monox source, aluminum oxide and acid liquid, and forming, drying and roasting the obtained mixture. The invention also relates to a method for desulfurizing the sulphur-contained gas by the gas desulfurization adsorbent. The gas desulfurization adsorbent disclosed by the invention has the advantages of improved materialization performance, longer service life and higher desulfurization activity and raw material adaptability.
Description
Technical field
The present invention relates to a kind of gas sweetening adsorbent, the preparation method of this gas sweetening adsorbent, by the gas sweetening adsorbent of described method preparation, and the sulfur method of sulfurous gas.
Background technology
Along with the pay attention to day by day of people to environmental protection, environmental regulation is day by day strict.In recent years, reduce sulphur emissions and be considered to one of most important measure that improves air quality.On the one hand, contain a large amount of sulfide in the tail gas, the particularly flue gas of the large power plant take coal as fuel at present a lot of commercial plants, these sulfide must can reach emission request through removing.On the other hand, often higher by the sulfur content of the natural gas of exploiting out in the natural gas well, usually up to 104ppm, these natural gases must just can reach civilian requirement through deep desulfuration.
The gas absorption desulfur technology has that treating capacity is large, desulfurization depth is high and to advantages such as various sulfide adaptability height, has broad application prospects aspect the sulfur-containing compound in removing natural gas.
CN1559680A disclose a kind ofly under certain temperature, pressure condition, remove in the natural gas, the solid desulphurization catalyst of the poisonous and harmful substance such as the sulfide in the flue gas, oxysulfide, thioether, take the percentage composition of catalyst weight as benchmark: ZnO content as 6.5% to 65%, NiO content as 0.5% to 2%, CaAlO
3Content is 11% to 40%, TiO
2Content is 0.5% to 2%, CoO content is 0.9% to 2%, MoO content is 0.7% to 3%, Al
2O
3Content is 20% to 70%.The solid desulphurization catalyst of this patent application can be used for removing the poisonous and harmful substances such as sulfide in the natural gas, in the flue gas, oxysulfide, thioether.Yet this solid desulphurization catalyst is slightly poor for the desulphurizing ability of the higher sulfurous gas raw material of sulfur content.
CN101970106A discloses a kind of particle sulfur removal material, and it comprises one or more nickel compounds, zinc oxide carrier material and one or more alkali metal compounds, and wherein, the content of nickel is the 0.3-10 % by weight, and alkali-metal content is the 0.2-10 % by weight.The sulfur removal material of this patent application can be used for making appropriate hydrocarbon gas material flow desulfurization with the hydrocarbon hydrogenolysis level that reduces.Yet the abrasion resistance properties of this sulfur removal material and compression strength are all poor, are unfavorable for using in the industry.
CN101249440A discloses a kind of hydrogenation adsorption desulfurize catalyst that contains aroamtic hydrocarbon raw material, and the weight percentage of this catalyst is: reduced state nickel content is 5～70%, and zinc oxide content is 30～95%, and alumina content is 0～50%.Yet there is the difficulty of moulding aspect in the described catalyst of this patent application, has limited its scope of application.
It is O composite metallic oxide catalyst that CN1868572A discloses a kind of iron, and this catalyst is used for the direct oxidation desulfurization.This catalyst forms by weight percentage: iron oxide content is 20～60%, and alumina content is 15～45%, and titanium oxide content is 15～45%, and zinc oxide content is 1～15%, and vanadium oxide content is 1～15%.This catalyst has higher activity and selective preferably, to H
2The S content range is that the sour gas between 1～85% can directly be processed, and is 1500～3000h at normal pressure or low pressure (0.4MPa), 180 ℃, air speed
-1Under the condition, H
2The conversion ratio of S can reach more than 95.0%.This catalyst can efficiently be removed a large amount of hydrogen sulfide contained in the gas, yet the desulfurization depth of this catalyst is lower slightly, can't directly the sulfur content in the sulfurous gas of routine be reduced to below the 10ppm.
CN1712500A discloses a kind of coal gas of high temperature composite oxide desulfurizing agent, the main active component of this desulfurizing agent is zinc oxide, less important active component is industrial cupric oxide, basic copper carbonate and natural manganese ore, wherein the content of zinc oxide be 33～50%, manganese oxide content be 0～10% and cupric oxide content be 0～15%.Close physical and chemical performance although this desulfurizing agent has good mechanical strength, can be applicable to fixed bed, fluid bed, air flow bed desulfurization reactor, this desulfurizing agent is inadequate to the adaptability of sulphur in the raw material, and is lower slightly for the removal activity of sulfurous organic compound.
Summary of the invention
The objective of the invention is provides a kind of new gas sweetening adsorbent and preparation method thereof in order to overcome the defects of existing gas sweetening adsorbent.
The invention provides a kind of gas sweetening adsorbent, wherein, this adsorbent contains molybdenum carbide, zinc oxide, silica source and aluminium oxide.
The present invention also provides a kind of preparation method of gas sweetening adsorbent, and the method comprises: molybdenum carbide, zinc oxide source, silica source, alumina source and acidic liquid are mixed contacting, and the mixture that obtains is carried out moulding, drying and roasting.
The present invention also provides the gas sweetening adsorbent by the said method preparation.
The present invention also provides a kind of sulfur method of sulfurous gas, and the method comprises: sulfurous gas is contacted with the gas sweetening adsorbent, and wherein, described gas sweetening adsorbent is described gas sweetening adsorbent of the present invention.
Gas sweetening adsorbent according to the present invention has higher desulphurizing activated and adaptability to raw material, can be used for the sulfurous gas raw material of various sulfur contents is carried out desulfurization, the sulfurous gas raw material that particularly sulfur content is higher is such as sulfur-containing tail gas (such as flue gas) of natural vapour, casing-head gas and various routines etc.; And, can obtain the sulfur content gas that meets the requirements after adopting described gas sweetening adsorbent of the present invention that sulfurous gas is processed.
And described gas sweetening adsorbent of the present invention has the physical and chemical performance (such as abrasion strength resistance, specific area) of improvement and long service life, has good practical application in industry and is worth.
In addition, described gas sweetening adsorbent of the present invention can be used for desulfurization under low temperature and the high temperature, is convenient to commercial Application.
In addition, the preparation method of described gas sweetening adsorbent of the present invention is simple, be easy to realize industrialization, and production cost is lower.
The specific embodiment
The invention provides a kind of gas sweetening adsorbent, wherein, this adsorbent contains molybdenum carbide, zinc oxide, silica source and aluminium oxide.
In the preferred case, take the gross weight of described adsorbent as benchmark, the content of molybdenum carbide is the 3-20 % by weight, and the content of zinc oxide is the 30-80 % by weight, and the content of silica source is the 10-40 % by weight, and the content of aluminium oxide is the 5-30 % by weight.
In preferred situation, take the gross weight of described adsorbent as benchmark, the content of molybdenum carbide is the 5-12 % by weight, and the content of zinc oxide is the 45-65 % by weight, and the content of silica source is the 15-25 % by weight, and the content of aluminium oxide is the 15-25 % by weight.
Gas sweetening adsorbent according to the present invention, described molybdenum carbide can be various commercially available molybdenum carbide products, for example can be available from traditional Chinese medicines chemical reagents corporation.Described molybdenum carbide preferably has the particle diameter of 100-500 nanometer.
According to the present invention, described silica source can be silica and/or the silica content natural minerals greater than 50 % by weight.Under the preferable case, described silica source is at least a in kaolin, diatomite, expanded perlite, carclazyte, silicalite, hydrolysis oxidation silicon, macropore silicon oxide and the silica gel, more preferably kaolin and/or diatomite.When described silica source was selected kaolin and/or diatomite, described gas sweetening adsorbent had the physical and chemical performance of further improvement.
In the present invention, described gas sweetening adsorbent can also contain metallic promoter agent.Described metallic promoter agent can be the conventional various metallic promoter agent of using in this area, for example can be in the oxide of the oxide of the oxide of the oxide that is selected from VB family metal, group vib metal, VIIB family metal and VIII family metal at least a, be preferably the oxide that is selected from least a metal in cobalt, nickel, iron, manganese, vanadium and the chromium, most preferably be nickel oxide and/or vanadium oxide.
The present invention also provides a kind of preparation method of gas sweetening adsorbent, and the method comprises: molybdenum carbide, zinc oxide source, silica source, alumina source and acidic liquid are mixed contacting, and the mixture that obtains is carried out moulding, drying and roasting.
For described molybdenum carbide, with respect to the silica source of 100 weight portions, the consumption of described molybdenum carbide can be the 20-120 weight portion, is preferably the 30-100 weight portion.Described molybdenum carbide and described silica source all with preamble describe identical.
For described zinc oxide source, with respect to the consumption of the described silica source of 100 weight portions, the consumption of described zinc oxide source can be the 100-1000 weight portion, is preferably the 300-800 weight portion.Described zinc oxide source can and/or can be converted into the zinc oxide precursor of zinc oxide for zinc oxide under the condition of described roasting.Described zinc oxide precursor can be in zinc sulphide, zinc sulfate, zinc hydroxide, zinc carbonate, zinc acetate and the zinc nitrate at least a.
For described alumina source, with respect to the consumption of the described silica source of 100 weight portions, the consumption of described alumina source can be the 50-300 weight portion, is preferably the 80-250 weight portion.Described alumina source can and/or can be converted into the alumina precursor of aluminium oxide for aluminium oxide under the condition of described roasting.Described alumina precursor can for aluminium colloidal sol, have structure of similar to thin diaspore hydrated alumina, have a diaspore structure hydrated alumina, have the hydrated alumina of gibbsite structure and have at least a in the hydrated alumina of bayerite structure.
For described acidic liquid, the consumption of acid is preferred so that the pH value of the mixture of described silica source, alumina source, zinc oxide source, M41S family mesopore molecular sieve and acidic liquid is 1-5, more preferably 1.5-4.Described acidic liquid can be acid or aqueous acid.Described acid can be water-soluble inorganic acid and/or water-soluble organic acid, for example can be in hydrochloric acid, nitric acid, phosphoric acid and the acetic acid at least a.
The preparation method of gas sweetening adsorbent according to the present invention, the mixture of described molybdenum carbide, zinc oxide source, silica source, alumina source and acidic liquid can be the forms such as wet mixture, paste mixture, dough or slurries.By described moulding, described mixture is shaped to extrudate, sheet, pill, ball or micro-spherical particle.For example, when described mixture is dough or paste mixture, can make this mixture moulding (preferred extrusion molding) be particle, preferred diameter is 1.0-8.0mm, length is the cylindrical extrudate of 2.0-5.0mm, then makes the extrudate of gained carry out drying, roasting; When described mixture is wet mixture, can make this mixture multiviscosisty, through the super-dry aftershaping; When described mixture was slurries, forming granularity by spray-drying was the microballoon of 20-200 micron, reaches the purpose of moulding, and for the ease of spray-drying, the solid content of dry front slurries is preferably the 10-50 % by weight, more preferably the 20-50 % by weight.
The method of described drying and condition have been conventionally known to one of skill in the art, for example, dry method can be dry, oven dry, forced air drying etc.The temperature of described drying can be room temperature to 400 ℃, is preferably 100-350 ℃.
The condition of described roasting also is conventionally known to one of skill in the art, and in general, the temperature of roasting can be 400-700 ℃, is preferably 450-650 ℃; The time of roasting can be 0.5 hour at least, is preferably 0.5-100 hour, more preferably 0.5-10 hour.
The preparation method of gas sweetening adsorbent according to the present invention is mixing described molybdenum carbide, zinc oxide source, silica source, alumina source and acidic liquid in the process that contacts, and there is no particular limitation for the order that feeds intake of various materials.In one embodiment, at first described alumina source can be mixed contacting with described acidic liquid, described alumina source is carried out acidifying, wherein, sour al mole ratio preferably is controlled to be 0.05-0.3; Then, acidified alumina source is contacted with described silica source, described zinc oxide source and molybdenum carbide mixing.In another embodiment, at first described silica source, described alumina source and described acidic liquid can be contacted and form slurries, and wear out; Then, mixing contacts with molybdenum carbide with described zinc oxide source with the slurries that obtain after aging.
In the present invention, the preparation method of described gas sweetening adsorbent can also comprise the step of introducing metallic promoter agent in the described gas sweetening adsorbent.Concrete, the method of introducing metallic promoter agent in the described gas sweetening adsorbent can comprise that described molybdenum carbide, zinc oxide source, silica source, alumina source and acidic liquid are mixed the product that contact and obtain after super-dry and roasting contact with the mixing of metallic promoter agent precursor, then carries out roasting.Described metallic promoter agent precursor can be in the acetate, carbonate, nitrate, sulfate, rhodanate and the oxide that are selected from the metal in the group that is formed by VB family metal, group vib metal, VIIB family metal and VIII family metal at least a, be preferably at least a in acetate, carbonate, nitrate, sulfate, rhodanate and the oxide of the metal in the group that vanadium, chromium, cobalt, nickel, iron and manganese forms; At least a in nickel acetate, nickelous carbonate, nickel nitrate, nickelous sulfate, nickel thiocyanide, nickel oxide, vanadium oxide and the chromium oxide more preferably.Described metallic promoter agent precursor can use with the form that contains or do not contain the crystallization water.
The present invention also provides the gas sweetening adsorbent by the said method preparation.
The present invention also provides a kind of sulfur method of sulfurous gas, and the method comprises: sulfurous gas is contacted with the gas sweetening adsorbent, and wherein, described gas sweetening adsorbent is described gas sweetening adsorbent provided by the invention.
The sulfur method of sulfurous gas according to the present invention, the condition that described sulfurous gas contacts with the gas sweetening adsorbent can comprise: temperature is 350-450 ℃.
After described contact finished, described method preferably also comprised and will regenerate through the desulfuration adsorbent after the contact.The method of regeneration can comprise: use first inert gas (such as nitrogen) to purge, then pass into oxygen-containing gas (oxygen content can be 30-60 volume %) and carry out high-temperature oxydation.
In the present invention, described sulfurous gas can be the sulfurous gas of various routines, such as being sulfur-containing tail gas (such as flue gas) of natural vapour, casing-head gas, various routines etc.Sulphur in the described sulfurous gas can be with hydrogen sulfide, sulfur dioxide, carbonyl sulfide (COS), carbon disulfide (CS
2) etc. form exist.
The invention will be further described by the following examples.
In the following Examples and Comparative Examples, the composition of gas sweetening adsorbent adopts the analysis of XRD (X-ray diffraction) method.
Embodiment 1
The present embodiment is used for illustrating described gas sweetening adsorbent of the present invention and preparation method thereof.
With 4.21 kilograms of Zinc oxide powders (available from Headhorse company, purity is about 99.7 % by weight), 2.48 kilograms diatomite is (available from Nanjing catalyst branch company, contain 2.40 kilograms of butts) and 6.57 kilograms of deionized waters mixing, stir and obtain zinc oxide and diatomaceous mixed serum after 30 minutes.
Get 3.01 kilograms in aluminium oxide (available from Shandong Aluminum Plant, containing 2.20 kilograms of butts) and 6.6 kilograms of deionized waters, the hydrochloric acid (chemical pure is available from the Beijing Chemical Plant) that then adds 500 milliliter of 30 % by weight stirs acidifying 1 hour.Then add zinc oxide and diatomaceous mixed serum and 1.21 kilograms of molybdenum carbides (available from traditional Chinese medicines chemical reagents corporation, purity is about 98 % by weight, and average grain diameter is about 200 nanometers), and stirred 1 hour, obtain the pH value and be 3 carrier pulp.
Described carrier pulp adopts Niro Bowen Nozzle Tower
TMThe spray dryer of model carries out spray-drying, and spray-drying pressure is 6.0-6.5MPa, and inlet temperature is below 340 ℃, and outlet temperature is about 120 ℃.The microballoon that is obtained by spray-drying obtains gas sweetening adsorbent A 1 400 ℃ of lower roastings 1 hour.
The chemical composition of this gas sweetening adsorbent A 1 is: zinc oxide content is 42 % by weight, and molybdenum carbide content is 12 % by weight, and alumina content is 22 % by weight, and diatomite content is 24 % by weight.
Comparative Examples 1
With 4.21 kilograms of Zinc oxide powders (available from Headhorse company, purity is about 99.7 % by weight), 2.48 kilograms diatomite is (available from Nanjing catalyst branch company, contain 2.40 kilograms of butts) and 6.57 kilograms of deionized waters mixing, stir and obtain zinc oxide and diatomaceous mixed serum after 30 minutes.
Get 3.01 kilograms in aluminium oxide (available from Shandong Aluminum Plant, containing 2.20 kilograms of butts) and 6.6 kilograms of deionized waters and under agitation mix, the hydrochloric acid (chemical pure is available from the Beijing Chemical Plant) that then adds 500 milliliter of 30 % by weight stirs acidifying 1 hour.Then add zinc oxide and diatomaceous mixed serum, and stirred 1 hour, obtain the pH value and be 2 carrier pulp.
Described carrier pulp adopts Niro Bowen Nozzle Tower
TMThe spray dryer of model carries out spray-drying, and spray-drying pressure is 6.0-6.5MPa, and inlet temperature is below 340 ℃, and outlet temperature is about 120 ℃.The microballoon that is obtained by spray-drying obtained adsorbing agent carrier in 1 hour 550 ℃ of lower roastings.
With 4.4 kilograms adsorbing agent carriers with the aqueous solution dipping that contains 2.40 kilograms of Nickelous nitrate hexahydrates (available from Beijing chemical reagents corporation, purity is approximately 98.5%) and 0.7 kilogram of deionized water, the adsorbent precursor that obtains.Then, at 180 ℃ after lower dry 2 hours, roasting is 1 hour under air atmosphere, 550 ℃ condition, obtains gas sweetening adsorbent B 1 with this adsorbent precursor.
The chemical composition of this gas sweetening adsorbent B 1 is: zinc oxide content is 42 % by weight, and nickel oxide content is 12 % by weight, and alumina content is 22 % by weight, and diatomite content is 24 % by weight.
Embodiment 2
The present embodiment is used for illustrating described gas sweetening adsorbent of the present invention and preparation method thereof.
With 5.02 kilograms of Zinc oxide powders (available from Headhorse company, purity is about 99.7 % by weight), 0.91 kilogram molybdenum carbide is (available from traditional Chinese medicines chemical reagents corporation, purity is about 98 % by weight, average grain diameter is about 200 nanometers) and 6.20 kilograms of deionized waters mixing, the mixed serum that obtains zinc oxide and molybdenum carbide after 30 minutes stirred.
Get 2.88 kilograms in aluminium oxide (available from Shandong Aluminum Plant, contain 2.10 kilograms of butts) and 2.50 kilograms kaolin (available from Nanjing catalyst branch company, contain 2.00 kilograms of butts) under agitation mix, then add after 6.6 kilograms of deionized waters mix, the hydrochloric acid (chemical pure is available from the Beijing Chemical Plant) that adds 440 milliliter of 30 % by weight stirs acidifying 1 hour.Then add the mixed serum of zinc oxide and molybdenum carbide, and stirred 1 hour, obtain the pH value and be 3 carrier pulp.
Method with reference to embodiment 1 is carried out spray drying forming and roasting with described carrier pulp, obtains gas sweetening adsorbent A 2.
The chemical composition of this gas sweetening adsorbent A 2 is: zinc oxide content is 50 % by weight, and molybdenum carbide content is 9 % by weight, and alumina content is 21 % by weight, and kaolin content is 20 % by weight.
Comparative Examples 2
5.02 kilograms of Zinc oxide powders (available from Headhorse company, purity is about 99.7 % by weight) and 6.20 kilograms of deionized waters are mixed, stir and obtain the zinc oxide slurries after 30 minutes.
Get 2.88 kilograms in aluminium oxide (available from Shandong Aluminum Plant, contain 2.10 kilograms of butts) and 2.50 kilograms kaolin (available from Nanjing catalyst branch company, contain 2.00 kilograms of butts) under agitation mix, then add after 6.6 kilograms of deionized waters mix, the hydrochloric acid (chemical pure is available from the Beijing Chemical Plant) that adds 440 milliliter of 30 % by weight stirs acidifying 1 hour.Then add the zinc oxide slurries, and stirred 1 hour, obtain the pH value and be 3 carrier pulp.
The method of reference counterpoint example 1 is carried out described carrier pulp spray drying forming and is introduced nickel oxide, obtains gas sweetening adsorbent B 2.
The chemical composition of this gas sweetening adsorbent B 2 is: zinc oxide content is 50 % by weight, and nickel oxide content is 9 % by weight, and alumina content is 21 % by weight, and kaolin content is 20 % by weight.
Embodiment 3
The present embodiment is used for illustrating described gas sweetening adsorbent of the present invention and preparation method thereof.
6.23 kilograms of Zinc oxide powders (available from Headhorse company, purity is about 99.7 % by weight) and 8.20 kilograms of deionized waters are mixed, stir and obtain the zinc oxide slurries after 30 minutes.
Get 2.19 kilograms in aluminium oxide (available from Shandong Aluminum Plant, contain 1.60 kilograms of butts) and 2.00 kilograms carclazyte (available from Nanjing catalyst branch company, contain 1.60 kilograms of butts) under agitation mix, then add after 6.6 kilograms of deionized waters mix, the hydrochloric acid (chemical pure is available from the Beijing Chemical Plant) that adds 360 milliliter of 30 % by weight stirs acidifying 1 hour.Then add zinc oxide slurries and 0.61 kilogram of molybdenum carbide (available from traditional Chinese medicines chemical reagents corporation, purity is about 98 % by weight, and average grain diameter is about 200 nanometers), and stirred 1 hour, obtain the pH value and be 4 carrier pulp.
Method with reference to embodiment 1 is carried out spray drying forming and roasting with described carrier pulp, obtains gas sweetening adsorbent A 3.
The chemical composition of this gas sweetening adsorbent A 3 is: zinc oxide content is 62 % by weight, and molybdenum carbide content is 6 % by weight, and alumina content is 16 % by weight, and carclazyte content is 16 % by weight.
Comparative Examples 3
6.23 kilograms of Zinc oxide powders (available from Headhorse company, purity is about 99.7 % by weight) and 8.20 kilograms of deionized waters are mixed, stir and obtain the zinc oxide slurries after 30 minutes.
Get 2.19 kilograms in aluminium oxide (available from Shandong Aluminum Plant, contain 1.60 kilograms of butts) and 2.00 kilograms carclazyte (available from Nanjing catalyst branch company, contain 1.60 kilograms of butts) under agitation mix, then add after 4.6 kilograms of deionized waters mix, the hydrochloric acid (chemical pure is available from the Beijing Chemical Plant) that adds 360 milliliter of 30 % by weight stirs acidifying 1 hour.Then add the zinc oxide slurries, and stirred 1 hour, obtain the pH value and be 3 carrier pulp.
Method with reference to embodiment 1 is carried out described carrier pulp spray drying forming and is introduced nickel oxide, obtains gas sweetening adsorbent B 3.
The chemical composition of this gas sweetening adsorbent B 3 is: zinc oxide content is 62 % by weight, and nickel oxide content is 6 % by weight, and alumina content is 16 % by weight, and carclazyte content is 16 % by weight.
Test case
(1) specific area of gas sweetening adsorbent A 1-A3 and B1-B3 adopts nitrogen physical absorption method, carries out at the 2020ASSP of Merck ﹠ Co., Inc adsorption instrument;
(2) intensity of gas sweetening adsorbent A 1-A3 and B1-B3 adopts straight tube wearing and tearing method to estimate, its evaluation method (is seen the volumes such as " Petrochemical Engineering Analysis method " (RIPP test method) Yang Cuiding with reference to the standard method of RIPP29-90, Science Press, nineteen ninety publishes), wherein, abrasion index is less, shows that abrasion strength resistance is higher;
The test result of gas with various desulfuration adsorbent is as shown in table 1 below.
Table 1
| Adsorbent | A1 | B1 | A2 | B2 | A3 | B3 |
| Specific area (m 2/g) | 47 | 42 | 46 | 36 | 44 | 33 |
| Abrasion index | 6.0 | 6.2 | 6.1 | 6.3 | 6.0 | 6.2 |
Data by table 1 can find out, prepared according to the methods of the invention gas sweetening adsorbent has higher specific area and abrasion strength resistance.
Embodiment 4
The present embodiment is used for illustrating the sulfur method of described sulfurous gas of the present invention.
It is in the 30mm fixed bed reactors that gas sweetening adsorbent A 1 is filled in internal diameter, and amount of fill is 30 grams.Then, under argon gas atmosphere, the gas sweetening adsorbent in the reactor is heated to 400 ℃.Then, in reactor, inject simulation sulfurous gas (2.8 volume % hydrogen sulfide, 0.2 volume %SO
2, 0.2 volume %COS, 47 volume % methane, 5 volume %H
2, 45 volume %N
2), the volume space velocity of injection is 1200h
-1
Adopting the on-line mass spectroscopy instrument is detector, measures the content of sulphur compound in the gas of discharging from reactor.Think that when the concentration of hydrogen sulfide in the tail gas reaches 20ppm described gas sweetening adsorbent absorbs saturated, the sulfur content in the described gas sweetening adsorbent is considered to the sulfur content that carries of this gas sweetening adsorbent at this moment.Current-carrying capacity is higher, shows the desulphurizing activated higher of gas sweetening adsorbent.
Absorb saturated after, adopt first nitrogen that the gas sweetening adsorbent in the reactor is purged 30 minutes, and temperature be raised to 500 ℃; Then pass into the gaseous mixture of 50 volume % air and 50 volume % nitrogen in the reactor, carry out oxidation regeneration, the gaseous mixture flow velocity is 160ml/min, and the recovery time is 2 hours.
Pass into High Purity Nitrogen after regeneration is finished and purge, and be cooled to reaction temperature, again adopt described simulation sulfurous gas to carry out the evaluation of a new circulation, carry out altogether 6 circulations and estimate.Year sulfur content of the gas sweetening adsorbent that each circulation is measured is as shown in table 2 below.
Embodiment 5-6 and Comparative Examples 4-6
Estimate the sulfur content that carries of gas sweetening adsorbent A 2-A3 and B1-B3 according to the method circulation of embodiment 7.Evaluation result is as shown in table 2 below.
Table 2
Data by table 2 can find out, prepared according to the methods of the invention gas sweetening adsorbent has higher desulphurizing activated.
Claims (17)
1. a gas sweetening adsorbent is characterized in that, this adsorbent contains molybdenum carbide, zinc oxide, silica source and aluminium oxide.
2. adsorbent according to claim 1, wherein, take the gross weight of described adsorbent as benchmark, the content of molybdenum carbide is the 3-20 % by weight, the content of zinc oxide is the 30-80 % by weight, and the content of silica source is the 10-40 % by weight, and the content of aluminium oxide is the 5-30 % by weight.
3. adsorbent according to claim 1, wherein, take the gross weight of described adsorbent as benchmark, the content of molybdenum carbide is the 5-12 % by weight, the content of zinc oxide is the 45-65 % by weight, and the content of silica source is the 15-25 % by weight, and the content of aluminium oxide is the 15-25 % by weight.
4. the described adsorbent of any one according to claim 1-3, wherein, the particle diameter of described molybdenum carbide is the 100-500 nanometer.
5. the described adsorbent of any one according to claim 1-3, wherein, described silica source is that silica and/or silica content are greater than the natural minerals of 50 % by weight.
6. adsorbent according to claim 5, wherein, described silica source is at least a in kaolin, diatomite, expanded perlite, carclazyte, silicalite, hydrolysis oxidation silicon, macropore silicon oxide and the silica gel.
7. the preparation method of a gas sweetening adsorbent, the method comprises: molybdenum carbide, zinc oxide source, silica source, alumina source and acidic liquid are mixed contacting, and the mixture that obtains is carried out moulding, drying and roasting.
8. method according to claim 7, wherein, silica source with respect to 100 weight portions, the consumption of described molybdenum carbide is the 20-120 weight portion, the consumption of described zinc oxide source is the 100-1000 weight portion, the consumption of described alumina source is the 50-300 weight portion, and the consumption of acid is so that the pH value of described mixture is 1-5.
9. according to claim 7 or 8 described methods, wherein, described acidic liquid is acid or aqueous acid, and described acid is water-soluble inorganic acid and/or water-soluble organic acid.
10. method according to claim 9, wherein, described acid is at least a in hydrochloric acid, nitric acid, phosphoric acid and the acetic acid.
11. according to claim 7 or 8 described methods, wherein, described alumina source is aluminium oxide and/or the alumina precursor that can be converted into aluminium oxide under the condition of described roasting.
12. method according to claim 11, wherein, described alumina precursor be aluminium colloidal sol, have structure of similar to thin diaspore hydrated alumina, have a diaspore structure hydrated alumina, have the hydrated alumina of gibbsite structure and have at least a in the hydrated alumina of bayerite structure.
13. according to claim 7 or 8 described methods, wherein, described zinc oxide source is zinc oxide and/or the zinc oxide precursor that can be converted into zinc oxide under the condition of described roasting.
14. method according to claim 13, wherein, described zinc oxide precursor is at least a in zinc sulphide, zinc sulfate, zinc hydroxide, zinc carbonate, zinc acetate and the zinc nitrate.
15. method according to claim 7, wherein, the temperature of described drying is room temperature to 400 ℃, and the temperature of described roasting is 400-700 ℃, and the time of described roasting is 0.5-100 hour.
16. the gas sweetening adsorbent by the described method preparation of any one among the claim 7-15.
17. the sulfur method of a sulfurous gas, the method comprises: sulfurous gas is contacted with the gas sweetening adsorbent, it is characterized in that, described gas sweetening adsorbent is the described gas sweetening adsorbent of any one in claim 1-6 and 16.
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| CN201110300008.6A CN103028363B (en) | 2011-09-29 | 2011-09-29 | The sulfur method of gas sweetening adsorbent and preparation method thereof and sulfurous gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105344338A (en) * | 2015-12-08 | 2016-02-24 | 无锡拓能自动化科技有限公司 | Preparation method of hydrogen sulfide gas adsorbing agent |
| CN108568201A (en) * | 2018-05-09 | 2018-09-25 | 西安瑞杰油田物资实业开发有限公司 | A kind of Desulfurization synergist and preparation method thereof |
| CN109999840A (en) * | 2019-04-10 | 2019-07-12 | 中南大学 | A kind of molybdenum carbide (MoC) hydrogen sulfide selective oxidation-desulfurizing catalyst and preparation method thereof |
| CN112591754A (en) * | 2020-12-25 | 2021-04-02 | 太原理工大学 | Preparation method of carbon nanocage coupled molybdenum carbide quantum dot nanocomposite |
| CN112619609A (en) * | 2020-11-26 | 2021-04-09 | 上海绿强新材料有限公司 | Adsorbent for synergistically removing sulfur and mercury and preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344338A (en) * | 2015-12-08 | 2016-02-24 | 无锡拓能自动化科技有限公司 | Preparation method of hydrogen sulfide gas adsorbing agent |
| CN108568201A (en) * | 2018-05-09 | 2018-09-25 | 西安瑞杰油田物资实业开发有限公司 | A kind of Desulfurization synergist and preparation method thereof |
| CN109999840A (en) * | 2019-04-10 | 2019-07-12 | 中南大学 | A kind of molybdenum carbide (MoC) hydrogen sulfide selective oxidation-desulfurizing catalyst and preparation method thereof |
| CN112619609A (en) * | 2020-11-26 | 2021-04-09 | 上海绿强新材料有限公司 | Adsorbent for synergistically removing sulfur and mercury and preparation method and application thereof |
| CN112591754A (en) * | 2020-12-25 | 2021-04-02 | 太原理工大学 | Preparation method of carbon nanocage coupled molybdenum carbide quantum dot nanocomposite |
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