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煤基活性多孔碳制备及其对CO2/CH4的吸附分离研究
时间: 2021-01-10 次数:

刘楠, 魏建平, 李瑶.煤基活性多孔碳制备及其对CO2/CH4的吸附分离研究[J].河南理工大学学报(自然科学版),2021,40(1):1-7.

LIU N, WEI J P, LI Y.Preparation of coal-based activated porous carbon and the study ofadsorption separation on CO2/CH4[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(1):1-7.

煤基活性多孔碳制备及其对CO2/CH4的吸附分离研究

刘楠1,2, 魏建平1,2,3, 李瑶1,2

1.河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南 焦作 454000;2.河南理工大学 安全科学与工程学 院,河南 焦作 454000;3.煤炭安全生产河南省协同创新中心,河南 焦作 454000

摘要:为了分离煤层气中的CO2和提高煤层气利用率,通过调控KOH对无烟煤的活化比例,制备一系列煤基活性多孔碳(APC-1 APC-2APC-4 )。通过扫描电镜表征可知,KOH活化对无烟煤的表面具有雕蚀作用,可形成发达的孔隙结构。通过氮气等温吸附测试可知,煤基活性多孔碳具有较高的比表面积(993 ~1 615 cm2/g)和孔体积(0.48 ~0.8 cm3/g)。在温度298  K 压力100 kPa条件下,APC-2CO2CH4的吸附量分别高达3.491.59 mmol/g。通过理想吸附溶液理论预测,APC-4对等物质量的二元混合气体CO2/ CH4吸附选择性可达4.57。本文制备方法合成工艺简单,适用于煤基活性多孔炭的制备,在吸附分离煤层气中CO2和提高煤层气 利用率方面具有广阔的应用前景。

关键词:无烟煤;煤基活性多孔碳;煤层气;吸附分离

doi:10.16186/j.cnki.1673-9787.2019070052

基金项目:国家自然科学基金资助项目(51574112 );教育部创新团队计划项目(IRT_16R22 );中国博士后科学基金面上项目 2018M632775 );河南省高等学校重点科研项目(18A620002);河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重 点实验室培育基地开放课题(WS2018A05

收稿日期:2019/07/11

修回日期:2019/10/09

出版日期:2021/01/15

Preparation of coal-based activated porous carbon and the study ofadsorption separation on CO2/CH4

LIU Nan1,2, WEI Jianping1,2,3, LI Yao1,2

1.Key Laboratory of Gas Geology and Gas Control ofHenan Province,Jiaozuo  454000 ,Henan,China;2.School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo  454000 ,Henan,China;3.The Collaborative Innovation Center of Coal Safety Production of Henan Province,Jiaozuo  454000 ,Henan,China

Abstract:In order to separate CO2  from coalbed methane CBM and further to improve CBM utilization,a series of coal-based active porous carbon APC-1 ,APC-2 and APC-4 were prepared by adjusting the activation intensity of KOH to anthracite.According to characterization of scanning electron microscopy,KOH activation had an erosive effect on the surface of anthracite and could form developed pore structure.The high specific surface area993 1 615 cm2/g and total pore volume0.48 0.8 cm3/g of coal-based active porous carbon could be analyzed by nitrogen adsorption isotherm measurement.The adsorption capacity of APC-2 for CO2 and CH4 could be up to 3.49 and 1.59  mmol/g,respectively,at 298 K and 100 kPa.Being predicted by idea adsorption solution theory,the adsorption selectivity of APC-4 for equimolar binary gas CO2/ CH4 could reach 4.57.This synthesis process was simple for coal-based active porous carbon preparation,which could provide a wide application prospect in separating  CO2  from CBM and improving CBM utilization.

Key words:anthracite;coal-based activated porous carbon;coalbed methane;adsorption separation

 煤基活性多孔碳制备及其对CO_2_CH_4的吸附分离研究_刘楠.pdf

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