CN103086354A - Carbon molecular sieve for concentrating and extracting CH4 from coal bed gas and preparation method thereof - Google Patents
Carbon molecular sieve for concentrating and extracting CH4 from coal bed gas and preparation method thereof Download PDFInfo
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- CN103086354A CN103086354A CN2013100227364A CN201310022736A CN103086354A CN 103086354 A CN103086354 A CN 103086354A CN 2013100227364 A CN2013100227364 A CN 2013100227364A CN 201310022736 A CN201310022736 A CN 201310022736A CN 103086354 A CN103086354 A CN 103086354A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/20—Capture or disposal of greenhouse gases of methane
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Abstract
The invention discloses a carbon molecular sieve for concentrating and extracting CH4 from coal bed gas and a preparation method thereof. The method comprises the following steps of: (1) mixing micro-powder phenolic resin waste, a bonder and water and performing extrusion forming to obtain a material strip; (2) carbonizing the material strip to obtain a carbonized material; and (3) adjusting the pores of the carbonized material by using a pore adjuster to obtain the carbon molecular sieve. The invention further provides a carbon molecular sieve prepared by the method. The carbon molecular sieve can be used for separating CH4/N2 mixed gases. The preparation method which uses the phenolic resin industrial waste as a raw material has the advantages of environmental friendliness, wide source and low cost, and meanwhile is relatively simple in process and easier to industrialize and ensure the stable quality of products. The carbon molecular sieve product prepared by the invention has a remarkable CH4/N2 separating performance, and absorbs N2 preferably. The product gas is directly enriched and recovered at the top of the tower, so that the operating cost of pressure swing adsorption can be lowered.
Description
Technical field
The present invention relates to the concentrated purification CH of a kind of coal-seam gas
4With carbonaceous molecular sieve and preparation method thereof.
Background technology
Mainly from down-hole extraction system, its main component is CH to China's coal bed gas resource
4, N
2And O
2, also contain a certain amount of CO according to different sources of the gas
2And one or more of the foreign gas such as water vapor.After the pre-treatment such as the coal-seam gas process desulfurization of exploiting out, drying, deoxidation, composition is with CH
4And N
2Be main, in coal-seam gas, the purification Major Difficulties of methane gas is CH
4And N
2Separation.
For present CH
4/ N
2Separation, the technology of R and D mainly contains low-temperature deep isolation technique, membrane separation technique and PSA Technology etc.Equipment is simple because it has for PSA Technology, flexible and convenient operation, operation energy consumption are low, and the recovery that is successfully applied to hydrogen is with refining, and the fields such as nitrogen production by air separation are considered to most possibly realize CH
4/ N
2The industrial gasses isolation technique of separating.
On industrial application, carbonaceous molecular sieve is as the main separation sorbent material of pressure-variable adsorption, obtained immense success in the gas delivery field, through the development of decades, high performance carbonaceous molecular sieve technology of preparing is still grasped by a few countries, mainly contains Japanese Kuraray company, Japanese Takeda company, German BF company and U.S. Calgon company, although the domestic significant progress that obtained, but it is single to be faced with product performance, mainly concentrates on the nitrogen production by air separation field, for CH in coal-seam gas
4/ N
2The carbonaceous molecular sieve research that separates is less.
Chinese patent CN101935032B discloses a kind of preparation method of carbonaceous molecular sieve, can be used for the direct purification of coal-seam gas methane, and it is raw material that the method adopts coal, coconut husk or resol, first prepares conventional carbonaceous molecular sieve, then with KOH or CO
2For activator carries out re-activation, the preparation the finished product, but through re-activation, complex process easily affects quality product, introduces KOH and also can bring corresponding environmental pollution and equipment corrosion problem.
Summary of the invention
The present invention is directed to present pressure-variable adsorption separation of C H
4/ N
2This difficult problem provides a kind of CH of can be used in
4/ N
2Carbonaceous molecular sieve that separates and preparation method thereof; The carbonaceous molecular sieve of the method preparation is to N
2Have higher spread coefficient, select absorption N
2, methane gas can be directly in the tower top enriching and recovering, and its performance can satisfy the requirement of industrialization pressure-variable adsorption; The method take resol class industrial waste as raw material, can solve environmental pollution and wasting of resources problem that present waste material brings simultaneously.
The preparation method of a kind of carbonaceous molecular sieve provided by the present invention comprises the steps:
(1) phenolic resin waste, binding agent and the water with the micro mist shape mixes, and obtains material strip through extrusion molding;
(2) described material strip is carried out charing, obtains carbonized material;
(3) with transferring the hole agent to transfer the hole namely to get described carbonaceous molecular sieve to described carbonized material.
In above-mentioned preparation method, in step (1), the particle diameter of the phenolic resin waste of described micro mist shape can be 5～75 μ m, specifically can be 5～37 μ m; Phenolic resin waste of the present invention refers to the tankage of resol series products, as flower mud scrap stock or discarded resol class lagging material etc.
The water content of the phenolic resin waste of described micro mist shape can be 0.5～8%, specifically can be 0.5～5.0%, 0.5%, 1.0%, 3.0% or 5.0%.
In above-mentioned preparation method, in step (1), described method also can comprise grinds granular phenolic resin waste the step of the phenolic resin waste that obtains described micro mist shape through ball milling or gas.
In above-mentioned preparation method, in step (1), before the step of described ball milling or gas mill, described method also can comprise carries out dry step to described granular phenolic resin waste;
The temperature of described drying can be 80～150 ℃, specifically can be 80～120 ℃, 80 ℃, 100 ℃, 120 ℃ or 150 ℃, can be 0.5～4h time of drying, specifically can be 0.5～2h, 0.5h, 1h or 2h.
In above-mentioned preparation method, in step (1), described binding agent can be at least a in coal tar, pitch, water soluble starch, spent pulping liquor, liquid phenolic resin and molasses;
The mass ratio of the phenolic resin waste of described micro mist shape, described binding agent and described water can be 100:20～60:2～10, specifically can be 100:40～45:5～10,100:40:10,100:42:10,100:43:8 or 100:45:50.
In above-mentioned preparation method, in step (1), it is that 1.8mm, post height are the cylinder shape stock column of 5mm that described material strip can be diameter.
In above-mentioned preparation method, in step (2), at first described charing comprises the steps: to rise to 300～350 ℃ with the heat-up rate of 3～15 ℃/min, specifically can 5 ℃/min, the heat-up rate of 5～8 ℃/min, 3～6 ℃/min or 8～10 ℃/min rises to 300 ℃, 310 ℃, 320 ℃ or 350 ℃, constant temperature 20～40min is as 20min or 30min; Then pass into inert atmosphere, then with the temperature rise rate to 500 of 3～15 ℃/min that heats up～950 ℃, as 650～850 ℃, 650 ℃, 700 ℃ or 850 ℃, constant temperature 30～90min is as 45～90min, 45min, 60min, 75min or 90min;
Described inert atmosphere can be nitrogen.
In above-mentioned preparation method, in step (3), the hole agent of described accent can be at least a in benzene,toluene,xylene, ethene and methyl alcohol;
The temperature in described accent hole can be 600～1000 ℃, specifically can be 800～900 ℃, 800 ℃, 850 ℃ or 900 ℃, and the time can be 0.5～2h, specifically can be 0.6～2h, 0.6h, 1h, 1.5h or 2h.
The present invention further provides the carbonaceous molecular sieve that is prepared by aforesaid method; Carbonaceous molecular sieve provided by the invention can be used for separation of C H
4/ N
2Mixed gas.
Preparation method take resol class industrial waste as raw material provided by the invention has protection of the environment, wide material sources, and cheap advantage, this technique is fairly simple simultaneously, is easy to the steady quality of industrialization and assurance product; The carbonaceous molecular sieve product of invention preparation has obvious CH
4/ N
2Separation performance, and preferentially adsorb N
2, gas product can reduce pressure-variable adsorption running cost in the direct enriching and recovering of tower top.
Embodiment
The experimental technique that uses in following embodiment is ordinary method if no special instructions.
In following embodiment, material used, reagent etc., if no special instructions, all can obtain from commercial channels.
Embodiment 1, preparation carbonaceous molecular sieve
the resol class waste material (flower mud scrap stock) collected is ground into granular material less than 2cm with pulverizer, at thermostatic drying chamber dry 0.5h under 150 ℃, material after drying is placed in ball mill pulverize material, water content is 0.5%, the pulverulent material granularity is controlled at 5～37 μ m, with pulverulent material, the binding agent that coal tar and liquid phenolic resin form, water is put into kneader and is mediated, pulverulent material/binding agent/water is 100/42/10 by mass fraction, be diameter 1.8mm through mediating aftershaping, the cylindric material of high 5mm, material is packed in the rotary type charring furnace, heat-up rate with 5～8 ℃/min is heated to 320 ℃, constant temperature 20min, pass into nitrogen, be warming up to 650 ℃ with 5～8 ℃/min of identical temperature rise rate again, constant temperature 45min at this temperature, afterwards under nitrogen protection, cooling discharge, carbon laydown adopts benzene for transferring the hole agent, at 800 ℃, transfer hole 0.6h, obtain carbonaceous molecular sieve.
The carbonaceous molecular sieve of the present embodiment preparation is used for CH
4/ N
2Gas mixture (CH wherein
4Volume content be 35%) pressure-variable adsorption separate, adsorptive pressure is controlled at 0.3MPa, in adsorption step, molecular sieve shows N
2Preferential adsorptivity, tower top directly enrichment obtain CH
4, through three grades of pressure-swing adsorption processes, concentrated rear CH
4Volume content reach 90%.
Embodiment 2, preparation carbonaceous molecular sieve
the resol class waste material (resol class lagging material) collected is ground into granular material less than 2cm with pulverizer, at thermostatic drying chamber dry 1h under 120 ℃, material after drying is placed in ball mill pulverize material, water content is 1.0%, the pulverulent material granularity is controlled at 5～37 μ m, with pulverulent material, the binding agent that coal tar and water soluble starch form, water is put into kneader and is mediated, pulverulent material/binding agent/water is 100/40/10 by mass fraction, be diameter 1.8mm through mediating aftershaping, the cylindric material of high 5mm, material is packed in the rotary type charring furnace, heat-up rate with 3～6 ℃/min is heated to 300 ℃, constant temperature 30min, pass into nitrogen, be warming up to 850 ℃ with 3～6 ℃/min again, constant temperature 60min at this temperature, afterwards under nitrogen protection, cooling discharge, carbon laydown adopts toluene for transferring the hole agent, at 800 ℃, transfer hole 1h, obtain carbonaceous molecular sieve.
The carbonaceous molecular sieve of the present embodiment preparation be can be used for CH
4/ N
2Gas mixture (CH wherein
4Volume content be 35%) pressure-variable adsorption separate, adsorptive pressure is controlled at 0.8MPa, in adsorption step, molecular sieve shows N
2Preferential adsorptivity, tower top directly enrichment obtain CH
4, through three grades of pressure-swing adsorption processes, concentrated rear CH
4Volume content reach 92%.
Embodiment 3, preparation carbonaceous molecular sieve
the resol class waste material (flower mud scrap stock) collected is ground into granular material less than 2cm with pulverizer, at thermostatic drying chamber dry 1h under 100 ℃, material after drying is placed in ball mill pulverize material, water content is 3.0%, the pulverulent material granularity is controlled at 5～37 μ m, with pulverulent material, the binding agent that spent pulping liquor and water soluble starch form, water is put into kneader and is mediated, pulverulent material/binding agent/water is 100/45/5 by mass fraction, be diameter 1.8mm through mediating aftershaping, the cylindric material of high 5mm, material is packed in the rotary type charring furnace, heat-up rate with 8～10 ℃/min is heated to 310 ℃, constant temperature 30min, pass into nitrogen, be warming up to 700 ℃ with 8～10 ℃/min again, constant temperature 90min at this temperature, afterwards under nitrogen protection, cooling discharge, carbon laydown adopts ethene for transferring the hole agent, at 850 ℃, transfer hole 1.5h, obtain carbonaceous molecular sieve.
The carbonaceous molecular sieve of the present embodiment preparation be can be used for CH
4/ N
2Gas mixture (CH wherein
4Volume content be 35%) pressure-variable adsorption separate, adsorptive pressure is controlled at 0.5MPa, in adsorption step, molecular sieve shows N
2Preferential adsorptivity, tower top directly enrichment obtain CH
4, through three grades of pressure-swing adsorption processes, concentrated rear CH
4Volume content reach 90.5%.
Embodiment 4, preparation carbonaceous molecular sieve
the resol class waste material (flower mud scrap stock) collected is ground into granular material less than 2cm with pulverizer, at thermostatic drying chamber dry 2h under 80 ℃, material after drying is placed in ball mill pulverize material, water content is 5.0%, the pulverulent material granularity is controlled at 5～37 μ m, with pulverulent material, the binding agent that pitch and molasses form, water is put into kneader and is mediated, pulverulent material/binding agent/water is 100/43/8 by mass fraction, be diameter 1.8mm through mediating aftershaping, the cylindric material of high 5mm, material is packed in the rotary type charring furnace, heat-up rate with 5 ℃/min is heated to 350 ℃, constant temperature 20min, pass into nitrogen, 5 ℃/min is warming up to 850 ℃ again, constant temperature 75min at this temperature, afterwards under nitrogen protection, cooling discharge, carbon laydown adopts methyl alcohol for transferring the hole agent, at 900 ℃, transfer hole 2.0h, obtain carbonaceous molecular sieve.
The carbonaceous molecular sieve of the present embodiment preparation be can be used for CH
4/ N
2Gas mixture (CH wherein
4Volume content be 35%) pressure-variable adsorption separate, adsorptive pressure is controlled at 0.6MPa, in adsorption step, molecular sieve shows N
2Preferential adsorptivity, tower top directly enrichment obtain CH
4, through three grades of pressure-swing adsorption processes, concentrated rear CH
4Volume content reach 91%.
Can be learnt by above each embodiment, preparation process provided by the invention is fairly simple, easily guarantees the steady quality of product, does not relate to chemical activating process in whole production process simultaneously, can not cause the corrosion of relevant device, not only protect environment but also reduced cost take industrial waste as raw material; The carbonaceous molecular sieve of preparation can be used for CH
4/ N
2The pressure-variable adsorption of gas mixture separates, tower top directly enrichment obtain CH
4, greatly reduce the power consumption of pressure-variable adsorption, have very high economy, concentrated rear CH
4Volume content reach more than 90%, can carry out industrial application.
Claims (10)
1. the preparation method of a carbonaceous molecular sieve, comprise the steps:
(1) phenolic resin waste, binding agent and the water with the micro mist shape mixes, and obtains material strip through extrusion molding;
(2) described material strip is carried out charing, obtains carbonized material;
(3) with transferring the hole agent to transfer the hole namely to get described carbonaceous molecular sieve to described carbonized material.
2. method according to claim 1, it is characterized in that: in step (1), the particle diameter of the phenolic resin waste of described micro mist shape is 5～75 μ m;
The water content of the phenolic resin waste of described micro mist shape is 0.5%～8%.
3. method according to claim 1 and 2 is characterized in that: in step (1), described method also comprises and granular phenolic resin waste is obtained the step of the phenolic resin waste of described micro mist shape through ball milling or gas mill.
4. method according to claim 3 is characterized in that: in step (1), before the step of described ball milling or gas mill, described method also comprises carries out dry step to described granular phenolic resin waste;
The temperature of described drying is 80～150 ℃, and be 0.5～4h time of drying.
5. the described method of any one according to claim 1-4 is characterized in that: in step (1), described binding agent is at least a in coal tar, pitch, water soluble starch, spent pulping liquor, liquid phenolic resin and molasses;
The mass ratio of the phenolic resin waste of described micro mist shape, described binding agent and described water is 100:20～60:2～10.
6. the described method of any one according to claim 1-5 is characterized in that: in step (1), described material strip is that to be that 1.8mm, post are high be the cylinder shape stock column of 5mm to diameter.
7. the described method of any one according to claim 1-6 is characterized in that: in step (2), at first described charing comprises the steps: to rise to 300～350 ℃, constant temperature 20～40min with the heat-up rate of 3～15 ℃/min; Then pass into inert atmosphere, then rise to 500～950 ℃, constant temperature 30～90min with the temperature rise rate of 3～15 ℃/min;
Described inert atmosphere is nitrogen.
8. the described method of any one according to claim 1-7 is characterized in that: in step (3), the hole agent of described accent is at least a in benzene,toluene,xylene, what methyl alcohol of ethene;
The temperature in described accent hole is 100～1000 ℃, and the time is 0.5～2h.
9. the carbonaceous molecular sieve that in claim 1-8, the described method of any one prepares.
10. carbonaceous molecular sieve claimed in claim 9 is at separation of C H
4/ N
2Application in mixed gas.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801273A (en) * | 2015-04-22 | 2015-07-29 | 煤炭科学技术研究院有限公司 | Adsorbent for coalbed methane concentration as well as preparation method and application thereof |
| CN105327678A (en) * | 2015-12-09 | 2016-02-17 | 煤炭科学技术研究院有限公司 | Industrial production technology for adsorbents special for concentration of coal bed gas and application |
| CN105935584A (en) * | 2016-05-26 | 2016-09-14 | 湖州民强炭业有限公司 | Palm tree palm fiber CMSCH4 concentrate methane carbon molecular sieve |
| CN107324307A (en) * | 2017-06-06 | 2017-11-07 | 中国地质科学院郑州矿产综合利用研究所 | Preparation method of carbon molecular sieve for separating methane and nitrogen |
| CN108057419A (en) * | 2017-12-19 | 2018-05-22 | 太原理工大学 | A kind of methane nitrogen separation carbon adsorbent and preparation method thereof |
| CN110773121A (en) * | 2019-11-08 | 2020-02-11 | 四川大学 | Boric acid modified molecular sieve and preparation method and application thereof |
| CN110773120A (en) * | 2019-11-08 | 2020-02-11 | 四川大学 | Metal salt modified molecular sieve and preparation method and application thereof |
| CN111039273A (en) * | 2020-01-06 | 2020-04-21 | 苏州班顺工业气体设备有限公司 | Carbon molecular sieve, production method and pressure swing adsorption nitrogen making machine prepared by using carbon molecular sieve |
| 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 |
| CN113877530A (en) * | 2021-11-03 | 2022-01-04 | 西南化工研究设计院有限公司 | Carbon molecular sieve adsorbent for selectively separating methane and nitrogen and preparation method thereof |
| CN114904485A (en) * | 2022-05-17 | 2022-08-16 | 山西综改示范区燃气有限公司 | Carbon-silicon composite material adsorbent for separating methane and nitrogen and preparation method thereof |
| CN115771894A (en) * | 2022-12-14 | 2023-03-10 | 宣城市中兴分子筛有限公司 | Preparation method of energy-saving and low-space-consumption carbon molecular sieve |
| CN116462195A (en) * | 2022-12-12 | 2023-07-21 | 宣城市中兴分子筛有限公司 | Preparation method of carbon molecular sieve for extracting methane from coal bed gas |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801273A (en) * | 2015-04-22 | 2015-07-29 | 煤炭科学技术研究院有限公司 | Adsorbent for coalbed methane concentration as well as preparation method and application thereof |
| CN105327678A (en) * | 2015-12-09 | 2016-02-17 | 煤炭科学技术研究院有限公司 | Industrial production technology for adsorbents special for concentration of coal bed gas and application |
| CN105327678B (en) * | 2015-12-09 | 2017-11-03 | 煤炭科学技术研究院有限公司 | A kind of industrialized producing technology of coal bed gas concentration Special adsorbent and application |
| CN105935584A (en) * | 2016-05-26 | 2016-09-14 | 湖州民强炭业有限公司 | Palm tree palm fiber CMSCH4 concentrate methane carbon molecular sieve |
| CN107324307B (en) * | 2017-06-06 | 2021-01-05 | 中国地质科学院郑州矿产综合利用研究所 | Preparation method of carbon molecular sieve for separating methane and nitrogen |
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| CN108057419A (en) * | 2017-12-19 | 2018-05-22 | 太原理工大学 | A kind of methane nitrogen separation carbon adsorbent and preparation method thereof |
| CN110773121A (en) * | 2019-11-08 | 2020-02-11 | 四川大学 | Boric acid modified molecular sieve and preparation method and application thereof |
| CN110773120A (en) * | 2019-11-08 | 2020-02-11 | 四川大学 | Metal salt modified molecular sieve and preparation method and application thereof |
| CN110773120B (en) * | 2019-11-08 | 2021-05-07 | 四川大学 | Metal salt modified molecular sieve and preparation method and application thereof |
| CN111039273A (en) * | 2020-01-06 | 2020-04-21 | 苏州班顺工业气体设备有限公司 | Carbon molecular sieve, production method and pressure swing adsorption nitrogen making machine prepared by using carbon molecular sieve |
| 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 |
| CN113877530A (en) * | 2021-11-03 | 2022-01-04 | 西南化工研究设计院有限公司 | Carbon molecular sieve adsorbent for selectively separating methane and nitrogen and preparation method thereof |
| CN114904485A (en) * | 2022-05-17 | 2022-08-16 | 山西综改示范区燃气有限公司 | Carbon-silicon composite material adsorbent for separating methane and nitrogen and preparation method thereof |
| CN114904485B (en) * | 2022-05-17 | 2023-10-24 | 山西综改示范区燃气有限公司 | Carbon-silicon composite adsorbent for separating methane and nitrogen and preparation method thereof |
| CN116462195A (en) * | 2022-12-12 | 2023-07-21 | 宣城市中兴分子筛有限公司 | Preparation method of carbon molecular sieve for extracting methane from coal bed gas |
| CN115771894A (en) * | 2022-12-14 | 2023-03-10 | 宣城市中兴分子筛有限公司 | Preparation method of energy-saving and low-space-consumption carbon molecular sieve |
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