CN105056882A - Preparation method of modified charcoal-based adsorbent for removing hydrogen sulfide - Google Patents
Preparation method of modified charcoal-based adsorbent for removing hydrogen sulfide Download PDFInfo
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- 239000003610 charcoal Substances 0.000 title claims abstract description 91
- 239000003463 adsorbent Substances 0.000 title claims abstract description 41
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000012670 alkaline solution Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000004888 barrier function Effects 0.000 claims abstract description 4
- 239000012266 salt solution Substances 0.000 claims abstract description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 72
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 230000004048 modification Effects 0.000 claims description 18
- 238000012986 modification Methods 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000007598 dipping method Methods 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 239000003054 catalyst Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims description 7
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000012298 atmosphere Substances 0.000 claims description 4
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical class [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 2
- 159000000009 barium salts Chemical class 0.000 claims description 2
- 159000000007 calcium salts Chemical class 0.000 claims description 2
- 150000001868 cobalt Chemical class 0.000 claims description 2
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 2
- 159000000003 magnesium salts Chemical class 0.000 claims description 2
- 150000002696 manganese Chemical class 0.000 claims description 2
- 150000002815 nickel Chemical class 0.000 claims description 2
- 150000003751 zinc Chemical class 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 240000007049 Juglans regia Species 0.000 abstract description 5
- 235000009496 Juglans regia Nutrition 0.000 abstract description 5
- 235000020234 walnut Nutrition 0.000 abstract description 5
- 235000013162 Cocos nucifera Nutrition 0.000 abstract description 3
- 244000060011 Cocos nucifera Species 0.000 abstract description 3
- 244000061176 Nicotiana tabacum Species 0.000 abstract description 3
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract description 3
- 235000017060 Arachis glabrata Nutrition 0.000 abstract description 2
- 244000105624 Arachis hypogaea Species 0.000 abstract description 2
- 235000010777 Arachis hypogaea Nutrition 0.000 abstract description 2
- 235000018262 Arachis monticola Nutrition 0.000 abstract description 2
- 244000018633 Prunus armeniaca Species 0.000 abstract description 2
- 235000009827 Prunus armeniaca Nutrition 0.000 abstract description 2
- 235000020232 peanut Nutrition 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 229940089401 xylon Drugs 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 18
- 239000010453 quartz Substances 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 17
- 238000001179 sorption measurement Methods 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000003708 ampul Substances 0.000 description 12
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 6
- 239000012190 activator Substances 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 229910002549 Fe–Cu Inorganic materials 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229960004643 cupric oxide Drugs 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052590 monazite Inorganic materials 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Abstract
The invention discloses a preparation method of a modified charcoal-based adsorbent for removing hydrogen sulfide and belongs to the field of preparation of adsorbents. Charcoal is taken as a carrier and modified with low-temperature plasma, and then the adsorbent for adsorbing hydrogen sulfide is prepared. The charcoal carrier is mainly prepared from raw materials such as walnut shells, coconut shells, xylon, apricot shells, tobacco stems, peanut shells and the like, added to a metal salt solution, dried after ultrasonic immersing and calcined; the calcined charcoal is put into an alkaline solution and dried after ultrasonic immersing; finally, different DBD (dielectric barrier discharge) reactors are used for modifying the low-temperature plasma in the presence of NH3, N2, O2 or air, and the modified charcoal-based adsorbent is prepared. The preparation method is simple in operation and low in cost; the adsorbent can realize industrial application easily, has a better removal effect and can be widely used for removing hydrogen sulfide in various gas sources.
Description
Technical field
The present invention relates to a kind of preparation method removing the modification biological carbon-supported catalyst of hydrogen sulfide, belong to low-temperature plasma modified catalyst technology and be applied to atmosphere pollution technical field.
Background technology
The production total scale of China's yellow phosphorus, output and export volume all rank first in the world, and 2011 annual capacity 2000000 t/a, output 960,000 t/a, accounts for more than 80% of world's total amount.The production of yellow phosphorus adopts electric furnace process usually, often produces 1t yellow phosphorus by-product tail gas 2500 ~ 3000m
3.Pernicious gas containing sulphur, phosphorus, fluorine, arsenic etc. in yellow phosphoric tail gas, direct contaminated environment.The utilization rate of China's yellow phosphoric tail gas is in reduced levels, is only 20% ~ 30%, and residual air burning emptying causes ample resources to waste.In yellow phosphorus phosphorus furnace exhaust gas, CO content is about 90%, good industrial chemicals and fuel, but due to the various compound impurities such as sulphur, phosphorus, fluorine, arsenic containing variform in tail gas, the comprehensive utilization of tail gas is restricted, cause very serious environmental pollution and the wasting of resources thus, become the principal element of restriction phosphorous chemical industry development.
Generally, for the H in yellow phosphoric tail gas
2s and PH
3removal methods comprise liquid phase catalytic oxidation, absorption process, absorption method, wet oxidation process and catalytic decomposition etc.Wherein absorption method be utilize in yellow phosphoric tail gas 0.5% ~ 1.0% micro-O
2, make H
2s is oxidized to S under the effect of catalyst, and the S that oxidation generates can be adsorbed at catalyst surface, thus realizes H
2the deep purifying of S.Charcoal, as the focus of Recent study, has given play to very large effect in various field.The application of current charcoal, mainly as catalyst carrier, because charcoal has huge specific area, can provide enough adsorption sites for catalytic reaction.Simultaneously the reproducibility of charcoal and mithridatism also better.In the removal of atmosphere pollution, be applied using charcoal as the catalyst of carrier.Such as: the removal (SCR) of NOx, H
2the removal (catalytic oxidation) of S, the removal (catalyzing hydrolysis) etc. of organic sulfur.
The pore structure and the specific area that it has been generally acknowledged that charcoal are the key factors affecting desulfuration efficiency.At present modified activated carbon is removed to the research of hydrogen sulfide, by modification, improve the adsorption capacity of active carbon, Chinese patent CN103495407A uses a kind of method by mao bamboon 80-90, polyethylene glycol 3-4, tourmaline powder 40-45, monazite powder 35-40, sodium metasilicate 5-7, potassium fluosilicate 12-14, attapulgite modified 9-10, water in right amount for the modified bamboo activated carbon desulfuration adsorbent removing hydrogen sulfide prepared by raw material; And Chinese patent CN102580675A carries out active carbon combined modified, active carbon is mixed with water and puts into pyroreaction still and carry out high temperature modified, by KOH or CuSO after drying
4solution impregnation modification, is finally washed with distilled water to neutrality, and after drying, obtained desulfuration adsorbent has good adsorption capacity to hydrogen sulfide, and substantially increases the sulfur capacity of active carbon.Or utilize metal inorganic salt pair active carbon to carry out modification, modified activated carbon surface-active site is increased, and then improve adsorption capacity.Chinese patent CN101954284A take active carbon as carrier, metal oxide mixture (mixture of cupric oxide, iron oxide, aluminium oxide, nickel oxide, manganese oxide, cobalt oxide and zinc oxide) is active component, through dipping, filter, washing, drying, prepares desulfurizing agent after roasting, and the clearance of hydrogen sulfide reaches 97%.Be based upon on the activated carbon modified basis of metal inorganic salt pair, further the research of modification is less.And have experimental study to show, by after low-temperature plasma modified, the avtive spot of activated carbon surface can be increased, also there is the effect changing charcoal material surface pore size distribution$ simultaneously.This is very helpful to the raising of absorption property.
And use low-temperature plasma modified charcoal base adsorbent thus the research improving its desulfuration efficiency rarely has report.By low temperature plasma, its absorption property is improved significantly to charcoal base adsorbent surface energy, and there is the advantages such as device structure is simple, easy and simple to handle.There is good application prospect.
Summary of the invention
The object of this invention is to provide a kind of preparation method removing the modification biological carbon-supported catalyst of hydrogen sulfide.The method concrete operations are as follows:
(1) grinding is sized to after the charcoal material of 40-60 and activator KOH fully mix in certain KOH/C ratio and puts into quartz ampoule, and quartz ampoule is placed in tube furnace nitrogen protection at a certain temperature activation 1 ~ 5h, heating rate 5 DEG C/min, nitrogen protection obtains charcoal after being cooled to room temperature;
(2) embathe with the nitric acid of 0.1mol/L, and be 6.5 ~ 7.0(weakly acidic pH with hot distilled water rinsing to pH), after filtration at 110 DEG C in air dry oven dry 6 ~ 8h;
(3) dried charcoal to be added in metal salt solution ultrasonic immersing 30 ~ 60 minutes, wherein, the addition of slaine is the 1-10% of the quality of dried charcoal; Then by the charcoal after dipping under 110 DEG C of temperature conditions dry 4 ~ 7 hours, then roasting 3 ~ 6 hours at 300 ~ 600 DEG C;
(4) charcoal after roasting is put into alkaline solution ultrasonic immersing 30 ~ 60 minutes, wherein, in alkaline solution, the quality of solute is the 10-30% of the quality of roasting artifact charcoal, then by the charcoal after dipping at 100 ~ 150 DEG C in air dry oven dry 4 ~ 7 hours, i.e. obtained charcoal base adsorbent;
(5) charcoal base adsorbent is put into DBD reactor, under 10 ~ 50V voltage, and at certain atmosphere (NH
3, N
2, O
2, air) carry out modification 5 ~ 15 minutes under condition, low-temperature plasma modified charcoal base adsorbent can be obtained.
In the present invention, carbonized material is obtained by nitrogen protection carbonization at a certain temperature after the dry fragmentation of the biomass material such as coconut husk, walnut shell, tobacco rod, wooden, apricot shell, peanut shell.
Slaine of the present invention is soluble ferric iron salt, one or more in mantoquita, zinc salt, nickel salt, cobalt salt, calcium salt, magnesium salts, barium salt, manganese salt, lanthanum nitrate, cerous nitrate mix in any proportion.
The present invention's alkaline impregnation used is one or more mixing in KOH, NaOH or ammonia spirit, and the mass percent concentration of alkaline solution is 20 ~ 50%.
The present invention's dielectric barrier discharge (DBD) reactor used comprises that plate is board-like, needle plate type and coaxial-type.
Beneficial effect of the present invention:
The corrasion that in the present invention, DBD is material modified can make the specific area of material and micro pore volume increase thus increase adsorption capacity, and some active groups can be adhered at material surface under different carrier gas condition, material surface can be made to adhere to NH as carried out modification under ammonia condition
4 +be conducive to H
2s removes.
The adsorption effect of charcoal base adsorbent to H2S that the present invention uses DBD modified significantly promotes, and Sulfur capacity can reach 153.32mg/g; The Sulfur capacity of 100mg/g is improve than the Sulfur capacity (51.11mg/g) of unmodified front biological carbon-supported catalyst.
Preparation method of the present invention is simple to operate, KOH and slaine impregnating agent cheap and easy to get, easily realize industrial applications, at a lower temperature also there is good removal effect, removing of hydrogen sulfide in all kinds of source of the gas can be widely used in.
Accompanying drawing explanation
Adsorption curve before and after Fig. 1 embodiment 1 coaxial-type DBD MODIFIED Fe/AC;
Adsorption curve before and after Fig. 2 embodiment 2 parallel plate type DBD modification Cu/AC;
Adsorption curve before and after Fig. 3 embodiment 3 needle plate type DBD modification Ce/AC;
Adsorption curve before and after Fig. 4 embodiment 4 coaxial-type DBD MODIFIED Fe-Ce/AC;
Adsorption curve before and after Fig. 5 embodiment 5 parallel plate type DBD MODIFIED Fe-Cu/AC.
Detailed description of the invention
Below in conjunction with specific embodiment, description the present invention is described in further detail, but scope is not limited to content as described below.
In test following examples, the activity of adsorbent can use H
2the clearance of S represents.
Embodiment 1
Grinding is sized to the cocoanut active charcoal of 40-60 and activator KOH by KOH/C(1: 1) fully put into quartz ampoule after mixing, and quartz ampoule is placed in tube furnace nitrogen protection activation 1h at 500 DEG C, heating rate 5 DEG C/min, nitrogen protection obtains charcoal after being cooled to room temperature; Embathe with the nitric acid of 0.1mol/L, and be 6.5 ~ 7.0(weakly acidic pH with hot distilled water rinsing to pH), after filtration at 110 DEG C in air dry oven dry 4h; Dried charcoal is added the middle ultrasonic immersing of ferric nitrate liquid (ferric nitrate quality is 5% of the quality of dried charcoal) 35 minutes, again by the charcoal after dipping at 110 DEG C in air dry oven dry 4 hours, then roasting 4 hours at 400 DEG C; Charcoal after roasting is put into potassium hydroxide (potassium hydroxide quality is 15% of the quality of charcoal) ultrasonic immersing 30 minutes, then by the charcoal after dipping at 110 DEG C in air dry oven dry 7 hours, i.e. obtained charcoal base adsorbent.Charcoal base adsorbent is put into coaxial-type DBD reactor, and under 45V voltage, discharging gap is 6mm, and medium is glass, carries out modification 10 minutes under ammonia condition, can obtain low-temperature plasma modified charcoal base adsorbent.The active testing of adsorbent carries out in the fixed-bed quartz reactor of Φ 4mm × 100mm.Reaction condition is: H
2s concentration 860mg/Nm
3, air speed 60000h
-1, reaction temperature 60 DEG C, H
2s clearance reaches the time remaining of 100% 5h; Absorption H
2the adsorption curve of S as shown in Figure 1.
Embodiment 2
Grinding is sized to the walnut shell active carbon of 40-60 and activator KOH by KOH/C(2: 1) fully put into quartz ampoule after mixing, and quartz ampoule is placed in tube furnace nitrogen protection activation 3h at 600 DEG C, heating rate 5 DEG C/min, nitrogen protection obtains activated material after being cooled to room temperature; Embathe with the nitric acid of 0.1mol/L, and be 6.5 ~ 7.0(weakly acidic pH with hot distilled water rinsing to pH), after filtration at 110 DEG C in air dry oven dry 4h; Dried charcoal is added the middle ultrasonic immersing of copper nitrate solution (copper nitrate quality is 3% of the quality of dried charcoal) 50 minutes, again by the charcoal after dipping at 110 DEG C in air dry oven dry 5 hours, then roasting 4 hours at 400 DEG C; Charcoal after roasting is put into sodium hydroxide solution (NaOH quality is 10% of the quality of charcoal) ultrasonic immersing 30 minutes, then by the charcoal after dipping at 100 DEG C in air dry oven dry 5 hours, i.e. obtained charcoal base adsorbent.Charcoal base adsorbent is put into parallel plate type DBD reactor, under 25V voltage, discharging gap is 6mm, carries out modification under a nitrogen atmosphere 15 minutes, can obtain low-temperature plasma modified charcoal base adsorbent.The active testing of adsorbent carries out in the fixed-bed quartz reactor of Φ 4mm × 100mm.Reaction condition is: H
2s concentration 840mg/Nm
3, air speed 60000h
-1, reaction temperature 60 DEG C, reaction outlet H do not detected
2the time remaining of S 2h; Absorption H
2the adsorption curve of S as shown in Figure 2.
Embodiment 3
Grinding is sized to the tobacco rod active carbon of 40-60 and activator KOH by KOH/C(2: 1) fully put into quartz ampoule after mixing, and quartz ampoule is placed in tube furnace nitrogen protection activation 5h at 700 DEG C, heating rate 5 DEG C/min, nitrogen protection obtains activated material after being cooled to room temperature; Embathe with the nitric acid of 0.1mol/L, and be 6.5 ~ 7.0(weakly acidic pH with hot distilled water rinsing to pH), after filtration at 110 DEG C in air dry oven dry 4h; Ultrasonic immersing 30 minutes in the cerous nitrate solution (cerous nitrate quality is 10% of the quality of dried charcoal) dried charcoal being added 5% charcoal quality, again by the charcoal after dipping at 110 DEG C in air dry oven dry 7 hours, then roasting 4 hours at 400 DEG C; Charcoal after roasting is put into ammoniacal liquor (quality of charcoal is 50% of sodium hydroxide solution quality) ultrasonic immersing 30 minutes, then by the charcoal after dipping at 110 DEG C in air dry oven dry 4 hours, i.e. obtained charcoal base adsorbent.Charcoal base adsorbent is put into needle plate type DBD reactor, under 15V voltage, discharging gap is 6mm, and under air conditions, carry out modification 5 minutes, can obtain low-temperature plasma modified charcoal base adsorbent.The active testing of adsorbent carries out in the fixed-bed quartz reactor of Φ 4mm × 100mm; Reaction condition is: H
2s concentration 800mg/Nm
3, air speed 60000h
-1, reaction temperature 60 DEG C, reaction outlet H do not detected
2the time remaining of S 1.5h; Absorption H
2the adsorption curve of S as shown in Figure 3.
Embodiment 4
Grinding is sized to the walnut shell active carbon of 40-60 and activator KOH by KOH/C(2: 1) fully put into quartz ampoule after mixing, and quartz ampoule is placed in tube furnace nitrogen protection activation 1h at 700 DEG C, heating rate 5 DEG C/min, nitrogen protection obtains activated material after being cooled to room temperature; Embathe with the nitric acid of 0.1mol/L, and be 6.5 ~ 7.0(weakly acidic pH with hot distilled water rinsing to pH), after filtration at 110 DEG C in air dry oven dry 4h; The Fe/Ce added by dried charcoal is ultrasonic immersing 30 minutes in the mixed solution (wherein ferric nitrate quality is 15% of the quality of dried charcoal) of the ferric nitrate of 2:1 and cerous nitrate, again by the charcoal after dipping at 110 DEG C in air dry oven dry 7 hours, then roasting 4 hours at 400 DEG C; Charcoal after roasting is put into potassium hydroxide (potassium hydroxide is 20% of the quality of charcoal) ultrasonic immersing 30 minutes, then by the charcoal after dipping at 110 DEG C in air dry oven dry 4 hours, i.e. obtained charcoal base adsorbent.Charcoal base adsorbent is put into coaxial-type DBD reactor, and under 30V voltage, discharging gap is 6mm, and under ammonia condition, carry out modification 10 minutes, can obtain low-temperature plasma modified charcoal base adsorbent.The active testing of adsorbent carries out in the fixed-bed quartz reactor of Φ 4mm × 100mm; Reaction condition is: H
2s concentration 800mg/Nm
3, air speed 60000h
-1, reaction temperature 60 DEG C, reaction outlet H do not detected
2the time remaining of S 3h; Absorption H
2the adsorption curve of S as shown in Figure 4.
Embodiment 5
Grinding is sized to the walnut shell active carbon of 40-60 and activator KOH by KOH/C(2: 1) fully put into quartz ampoule after mixing, and quartz ampoule is placed in tube furnace nitrogen protection activation 1h at 700 DEG C, heating rate 5 DEG C/min, nitrogen protection obtains activated material after being cooled to room temperature; Embathe with the nitric acid of 0.1mol/L, and be 6.5 ~ 7.0(weakly acidic pH with hot distilled water rinsing to pH), after filtration at 110 DEG C in air dry oven dry 4h; The Fe/Cu added by dried charcoal is ultrasonic immersing 30 minutes in the mixed solution (wherein ferric nitrate quality is 5% of the quality of dried charcoal) of the ferric nitrate of 2:1 and copper nitrate, again by the charcoal after dipping at 110 DEG C in air dry oven dry 7 hours, then roasting 4 hours at 400 DEG C; Charcoal after roasting is put into potassium hydroxide (potassium hydroxide is 20% of the quality of charcoal) ultrasonic immersing 30 minutes, then by the charcoal after dipping at 110 DEG C in air dry oven dry 4 hours, i.e. obtained charcoal base adsorbent.Charcoal base adsorbent is put into parallel plate type DBD reactor, under 30V voltage, discharging gap is 6mm, and under ammonia condition, carry out modification 10 minutes, can obtain low-temperature plasma modified charcoal base adsorbent.The active testing of adsorbent carries out in the fixed-bed quartz reactor of Φ 4mm × 100mm; Reaction condition is: H
2s concentration 800mg/Nm
3, air speed 60000h
-1, reaction temperature 60 DEG C, reaction outlet H do not detected
2the time remaining of S 2.5h; Absorption H
2the adsorption curve of S as shown in Figure 5.
Claims (4)
1. remove a preparation method for the modification biological carbon-supported catalyst of hydrogen sulfide, it is characterized in that being undertaken by following processing step:
(1) charcoal material is ground into 40-60 order, for subsequent use;
(2) in KOH and charcoal material in mass ratio for the ratio of 1:1 ~ 3:1 KOH mixed the temperature conditions being placed on 500 ~ 700 DEG C with charcoal under nitrogen protection activate 1 ~ 5h, nitrogen protection obtains activation artifact charcoal after being cooled to room temperature, wherein, heating rate is 5 DEG C/min;
(3) embathe with 0.1mol/L ~ 1mol/L nitric acid, and be 6.5 ~ 7.0 with distilled water rinsing to pH, after filtration under the temperature conditions of 90 ~ 120 DEG C dry 6 ~ 8h;
(4) dried charcoal to be added in metal salt solution ultrasonic immersing 30 ~ 60 minutes, wherein, the addition of slaine is the 1-10% of the quality of dried charcoal; Then by the charcoal after dipping under 110 DEG C of temperature conditions dry 4 ~ 7 hours, then roasting 3 ~ 6 hours at 300 ~ 600 DEG C;
(5) charcoal after roasting is put into alkaline solution ultrasonic immersing 30 ~ 60 minutes, wherein, in alkaline solution, the quality of solute is the 10-30% of the quality of roasting artifact charcoal, then by the charcoal after dipping at 100 ~ 150 DEG C in air dry oven dry 4 ~ 7 hours, i.e. obtained charcoal base adsorbent;
(6) charcoal base adsorbent is put into dielectric barrier discharge reactor, under 10 ~ 50V voltage, at atmosphere NH
3, N
2, O
2or carry out modification 5 ~ 15 minutes under air conditions, low-temperature plasma modified charcoal base adsorbent can be obtained.
2. according to claim 1 with charcoal be carrier remove hydrogen sulfide adsorbent, it is characterized in that: described slaine is soluble ferric iron salt, one or more in mantoquita, zinc salt, nickel salt, cobalt salt, calcium salt, magnesium salts, barium salt, manganese salt, lanthanum nitrate, cerous nitrate mix in any proportion.
3. according to claim 1 take charcoal as the preparation method removing hydrogen sulfide adsorbent of carrier, it is characterized in that: alkaline solution is one or more mixing in KOH, NaOH or ammonia spirit, and the mass percent concentration of alkaline solution is 20 ~ 50%.
4. according to claim 1 take charcoal as the preparation method removing hydrogen sulfide adsorbent of carrier, it is characterized in that: plate is board-like in order to comprise for described dielectric barrier discharge reactor, needle plate type or coaxial-type.
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