CN105502379A - Preparation method of active carbon for adsorbing and separating carbon dioxide - Google Patents
Preparation method of active carbon for adsorbing and separating carbon dioxide Download PDFInfo
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- CN105502379A CN105502379A CN201511013483.XA CN201511013483A CN105502379A CN 105502379 A CN105502379 A CN 105502379A CN 201511013483 A CN201511013483 A CN 201511013483A CN 105502379 A CN105502379 A CN 105502379A
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Abstract
The invention discloses a preparation method of active carbon for adsorbing and separating carbon dioxide. The preparation method comprises the following specific steps: A, taking blind coal as a raw material, grinding into powder until the 200-mesh passing rate is greater than 90 percent so as to obtain pulverized coal; B, mixing and kneading the pulverized coal, a catalyst KNO3, water and coal tar uniformly in kneading and stirring equipment according to a mass ratio of 100: (2 to 5): (6 to 8): (30 to 33) to form a coal paste, and then extruding to form carbon strips; C, feeding the carbon strips into a carbonization stove at the carbonization temperature of 650 to 750 DEG C, and controlling the carbonization time to be 40 to 60 min to obtain a carbonized material with the volatile matter of 8 percent to 12 percent; and D, feeding the carbonized material into an activating stove, introducing CO2 gas for activation at the carbonization temperature of 900 to 960 DEG C, controlling the activation time so that the product yield occupies 50 percent to 70 percent of carbonized material inside the stove, and cooling to obtain the active carbon. The CO2 adsorbing capacity of the active carbon prepared with the method exceeds 90 mL/g, and reaches the international advanced level.
Description
Technical field
The present invention relates to a kind of preparation method of fractionation by adsorption carbonic acid gas gac, be particularly useful for pressure swing adsorption process separating carbon dioxide.
Background technology
A large amount of CO is produced in coal burning process
2, the energy structure based on coal, causes the Carbon emission state that China becomes maximum in the world, and due to the international convention requirement of greenhouse-gas control, be faced with huge international pressure, China must solve the trapping of carbonic acid gas and seal problem up for safekeeping.
CO in current research
2capture method has solvent absorption, cryogenic rectification method, membrane separation process and pressure swing adsorption process etc.Wherein, pressure swing adsorption has that equipment is simple, corrosion-free, long service life, easy to operate, cost is low, technically reliable, the advantage such as pollution-free, therefore for concentrating and separating CO
2there is great development prospect and realistic meaning.The core of pressure swing adsorption is sorbent material, and sorbent material is to CO
2adsorptive power and selectivity determine pressure swing adsorption process separation of C O
2complexity and economy, therefore pressure swing adsorption separation and collection CO
2key be produce with low cost, that absorption property is good sorbent material.
At CO
2purify and concentrated Application Areas, the CO of pressure-variable adsorption charcoal in the world
2adsorptive capacity (0 DEG C, 1atm) can reach more than 90mL/g, and China's pressure-variable adsorption activated carbon product index is generally on the low side, CO
2adsorptive capacity mostly at 75mL/g(1atm, 0 DEG C) below.
As: mention coal-based granular activated carbon preparation during the patent that domestic University Of Chongqing declares " has the preparation method of coal-based granular activated carbon (200910190860.5) of molecular sieve effect " and comprise the steps: that coal is pulverized by (a); (b) add in coal dust coal tar wet goods binding agent and and water mix; C () is shaped to right cylinder particle dry again; D () is by the right cylinder particle carbonization under nitrogen protection after shaping; E right cylinder particle after carbonization is used steam activation by () under nitrogen protection; F () to be cooled to after room temperature discharging again through washing and dry.Concrete CO is not had in literary composition
2adsorptive capacity explanation, only mentioning unstripped gas is titanium dioxide carbon/nitrogen gas, wherein the concentration of volume percent of carbonic acid gas is 13%, adsorptive pressure is 0.8MPa, adsorption time 30s, is forward decompressed to 0.15MPa, and being separated the gas carbon dioxide concentration obtained is 39%, illustrate that its separation factor is less, do not reach the technical indicator of high-performance transformation absorption activated carbon.
Therefore, the CO of the pressure-variable adsorption charcoal of domestic production is urgently changed
2adsorptive capacity is difficult to the present situation more than 75mL/g.
Summary of the invention
For above-mentioned existing technical problem, the invention provides a kind of preparation method of fractionation by adsorption carbonic acid gas gac, by the coupling of feed coal, catalyzer and activator, to prepare the gac of high-performance fractionation by adsorption carbonic acid gas.
For achieving the above object, the invention provides a kind of preparation method of fractionation by adsorption carbonic acid gas gac, comprise following concrete steps: A, be raw material with hard coal, abrasive dust to 200 order percent of pass > 90%, obtains coal dust.
Further, Taixi anthracite selected by described hard coal.
B, by coal dust, catalyzer KNO
3, water and coal tar 100:2-5:6-8:30-33 even coal-forming cream of kneading in kneading whipping device in mass ratio, be then squeezed into sketching charcoal.Wherein, the interpolation of water is mainly in order to catalyst-solvent, and addition is can dissolve the KNO added completely
3for degree, coal tar is then to cohere coal dust, makes the gac finally prepared have enough intensity.
Further, described coal dust, catalyzer KNO
3, water and coal tar optimum ratio be 100:3:6:32, Properties of Activated Carbon and manufacturing cost have best balance.
C, to be sent into by sketching charcoal and be in the charring furnace of room temperature, isolated atmosphere temperature rising is to 650-750 DEG C, and control carbonization time is 40-60min, must volatilize and be divided into the carbonized material of 8%-12%.
Further, carbonization temperature preferably 650 DEG C, entering stove to the carbonization time of coming out of the stove is 50min, and charred effect is best.
D, carbonized material is sent into activation furnace, pass into CO
2gas activation, activation temperature is 900-960 DEG C, controls soak time, makes product yield account for 50%-70% into stove carbonized material, obtains gac after cooling.
Further, activation temperature preferably 930 DEG C, now the yield of product can reach about 65% of stove carbonized material, and yield, efficiency and cost consider the best.
In preparation feedback process of the present invention, KNO
3there is dual effect, it can decompose generation oxygen under carbonization temperature on the one hand, such oxygen can make the order of feed coal molecular structure be destroyed, thus produce more active site easily and activated gas react, pore-creating quickly, thus make the pore texture of gac be tending towards concentrated, be conducive to improving energy CO absorption
2the formation of hole; On the other hand, KNO
3the existence of middle K element, has katalysis, particularly has very strong katalysis for priming reaction, can greatly accelerate priming reaction speed, because CO in charing and reactivation process
2the speed of activation ratio steam activation is a lot of slowly.And in reactivation process, CO
2with the priming reaction speed of carbonized material lower than water vapour, make CO
2be easier to go deep into pore interior and carbon reacts pore-creating, water vapour molecule then more reacts near pore entryway, because water vapour speed of response is fast, the water vapor concentration at pore entryway place is greater than pore interior, and this is also CO
2the pore texture of activation is more tending towards the reason compared with close limit micropore.
In sum, the present invention utilizes physical activation method, by Taixi anthracite, catalyzer KNO
3and CO
2do the coupling of activated gas three, make the gac prepared to CO
2adsorptive capacity is more than 90mL/g, CO
2absorption index can be reached advanced world standards.
Accompanying drawing explanation
Fig. 1 is the preparation flow schematic diagram of gac of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The present invention is on regular activated charcoal producing technique basis, by hard coal, catalyzer KNO
3with activator CO
2the coupling of gas, as shown in Figure 1, through steps such as abrasive dust-kneading, press strip-charing-activation, prepares high-performance fractionation by adsorption CO
2activated carbon product, embodiment is as follows.
Embodiment 1:
First, by Taixi anthracite abrasive dust to 200 order percent of pass > 90%.
Then, mass ratio coal dust and catalyzer, water and coal tar being pressed 100:2:6:30 is mediating the even coal-forming cream of kneading in whipping device, and is squeezed into sketching charcoal.
Then, send in charring furnace by sketching charcoal under room temperature, rise to 700 DEG C in 40min, take out, cool, gained carbonized material volatile matter is about 8.5%.
Finally, carbonized material is sent into activation furnace, pass into CO
2900 DEG C of activation, activation 150min.The activation rate of gained activated carbon product accounts for into stove carbonized material 62%.
The gac obtained is carried out adsorption test, draws products C O
2adsorptive capacity (0 DEG C, 1atm) is 90.1mL/g.
Embodiment 2:
First, by Taixi anthracite abrasive dust to 200 order percent of pass > 90%.
Then, coal dust and catalyzer, water and coal tar are being mediated the even coal-forming cream of kneading in whipping device in the ratio of 100:3:7:31, and is being squeezed into sketching charcoal.
Send in charring furnace by sketching charcoal under room temperature, rise to 680 DEG C in 45min, take out, cool, gained carbonized material volatile matter is about 10.2%.
Finally, carbonized material is sent into activation furnace, pass into CO
2920 DEG C of activation, control soak time 140min, make the yield of activation of final activated carbon product be 60%.
The gac obtained is carried out adsorption test, draws products C O
2adsorptive capacity (0 DEG C, 1atm) is 91.3mL/g.
Embodiment 3:
First, by Taixi anthracite abrasive dust to 200 order percent of pass > 90%.
Then, coal dust and catalyzer, water and coal tar are being mediated the even coal-forming cream of kneading in whipping device in the ratio of 100:3:6:32, and is being squeezed into sketching charcoal.
Send in charring furnace by sketching charcoal under room temperature, rise to 650 DEG C in 50min, take out, cool, gained carbonized material volatile matter is about 10.2%.
Finally, carbonized material is sent into activation furnace, pass into CO
2930 DEG C of activation, control soak time 130min, make final yield of activation be 65.3%.
The gac obtained is carried out adsorption test, draws products C O
2adsorptive capacity (0 DEG C, 1atm) is 92.2mL/g.
Embodiment 4:
First, by Taixi anthracite abrasive dust to 200 order percent of pass > 90%.
Then, by coal dust and catalyzer, water and coal tar in the ratio of 100:5:8:33 mediating the even coal-forming cream of kneading in whipping device, be squeezed into sketching charcoal.
Send in charring furnace by sketching charcoal under room temperature, rise to 600 DEG C in 60min, take out, cool, gained carbonized material volatile matter is about 10.5%.
Finally, carbonized material is sent into activation furnace, pass into CO
2at 960 DEG C of activation 100min, the yield of activation of final activated carbon product accounts for into stove carbonized material 68.1%.
The gac obtained is carried out adsorption test, draws products C O
2adsorptive capacity (0 DEG C, 1atm) is 90.5mL/g.
To sum up, from adsorption test result, the adsorbent charcoal that the inventive method adopts physical activation method to prepare is to CO
2adsorptive capacity is more than 90mL/g, and its absorption index can be reached advanced world standards.
Claims (4)
1. a preparation method for fractionation by adsorption carbonic acid gas gac, is characterized in that, comprises following concrete steps:
A, be raw material with hard coal, abrasive dust to 200 order percent of pass > 90%, obtains coal dust;
B, by coal dust, catalyzer KNO
3, water and coal tar 100:2-5:6-8:30-33 even coal-forming cream of kneading in kneading whipping device in mass ratio, be then squeezed into sketching charcoal;
C, to be sent into by sketching charcoal and be in the charring furnace of room temperature, isolated atmosphere temperature rising is to 650-750 DEG C, and control carbonization time is 40-60min, must volatilize and be divided into the carbonized material of 8%-12%;
D, carbonized material is sent into activation furnace, pass into CO
2gas activation, activation temperature is 900-960 DEG C, controls soak time, makes product yield account for 50%-70% into stove carbonized material, obtains gac after cooling.
2. the preparation method of a kind of fractionation by adsorption carbonic acid gas gac according to claim 1, is characterized in that, coal dust, catalyzer KNO in described step B
3, water and coal tar optimum ratio be 100:3:6:32.
3. the preparation method of a kind of fractionation by adsorption carbonic acid gas gac according to claim 1 and 2, it is characterized in that, Taixi anthracite selected by described hard coal.
4. the preparation method of a kind of fractionation by adsorption carbonic acid gas gac according to claim 1 and 2, it is characterized in that, in described step C, carbonization temperature selects 650 DEG C, and carbonization time is 50min.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145110A (en) * | 2016-07-05 | 2016-11-23 | 中国矿业大学 | A kind of activated carbon two step process for preparing activated and the application in ultracapacitor thereof |
| CN109368637A (en) * | 2018-12-14 | 2019-02-22 | 上海熙碳环保科技有限公司 | A kind of the high-efficiency multi-function active carbon and its preparation process of superpower absorption |
| CN109467083A (en) * | 2017-09-08 | 2019-03-15 | 镇江瑞德新材料科技研发有限公司 | A kind of preparation method of adsorbing separation carbon dioxide active carbon |
| CN111729643A (en) * | 2020-07-02 | 2020-10-02 | 煤炭科学技术研究院有限公司 | Modified coconut shell-based adsorbent for separating methane/carbon dioxide and preparation method thereof |
| CN112919461A (en) * | 2021-03-31 | 2021-06-08 | 国家能源集团宁夏煤业有限责任公司 | Preparation method of coal-based activated carbon for nitrogen/methane separation and prepared activated carbon |
| CN114671432A (en) * | 2022-04-18 | 2022-06-28 | 中国矿业大学 | Coal-based high-performance CO2Preparation method of activated carbon material for adsorption |
| CN114804102A (en) * | 2022-05-06 | 2022-07-29 | 国家能源集团宁夏煤业有限责任公司 | Nitrogen-doped activated carbon and preparation method thereof |
| CN115259153A (en) * | 2022-06-30 | 2022-11-01 | 宁夏华辉环保科技股份有限公司 | Active carbon for efficiently and specially adsorbing acetone and preparation method thereof |
| CN115672258A (en) * | 2022-11-09 | 2023-02-03 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method and application of porous magnesium-based carbon dioxide adsorbing material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145110A (en) * | 2016-07-05 | 2016-11-23 | 中国矿业大学 | A kind of activated carbon two step process for preparing activated and the application in ultracapacitor thereof |
| CN109467083A (en) * | 2017-09-08 | 2019-03-15 | 镇江瑞德新材料科技研发有限公司 | A kind of preparation method of adsorbing separation carbon dioxide active carbon |
| CN109368637A (en) * | 2018-12-14 | 2019-02-22 | 上海熙碳环保科技有限公司 | A kind of the high-efficiency multi-function active carbon and its preparation process of superpower absorption |
| CN111729643A (en) * | 2020-07-02 | 2020-10-02 | 煤炭科学技术研究院有限公司 | Modified coconut shell-based adsorbent for separating methane/carbon dioxide and preparation method thereof |
| CN112919461A (en) * | 2021-03-31 | 2021-06-08 | 国家能源集团宁夏煤业有限责任公司 | Preparation method of coal-based activated carbon for nitrogen/methane separation and prepared activated carbon |
| CN114671432A (en) * | 2022-04-18 | 2022-06-28 | 中国矿业大学 | Coal-based high-performance CO2Preparation method of activated carbon material for adsorption |
| CN114804102A (en) * | 2022-05-06 | 2022-07-29 | 国家能源集团宁夏煤业有限责任公司 | Nitrogen-doped activated carbon and preparation method thereof |
| CN115259153A (en) * | 2022-06-30 | 2022-11-01 | 宁夏华辉环保科技股份有限公司 | Active carbon for efficiently and specially adsorbing acetone and preparation method thereof |
| CN115259153B (en) * | 2022-06-30 | 2024-04-26 | 宁夏华辉环保科技股份有限公司 | Efficient special-effect activated carbon for adsorbing acetone and preparation method thereof |
| CN115672258A (en) * | 2022-11-09 | 2023-02-03 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method and application of porous magnesium-based carbon dioxide adsorbing material |
| CN115672258B (en) * | 2022-11-09 | 2024-03-15 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method and application of porous magnesium-based carbon dioxide adsorption material |
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Application publication date: 20160420 |