煤基活性多孔碳制备及其对CO2/CH4的吸附分离研究  

Preparation of coal-based activated porous carbon and the study of adsorption separation on CO/CH

作　　者：刘楠 魏建平[1,2,3] 李瑶 LIU Nan;WEI Jianping;LI Yao(Key Laboratory of Gas Geology and Gas Control of Henan Province,Jiaozuo 454000,Henan,China;School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;The Collaborative Innovation Center of Cool Safety Production of Henan Province,Jiaozuo 454000,Henan,China)

机构地区：[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

出　　处：《河南理工大学学报（自然科学版）》2021年第1期1-7,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：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)。

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-2和APC-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和压力100 kPa条件下,APC-2对CO2和CH4的吸附量分别高达3.49,1.59 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。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 area(993~1 615 cm2/g)and total pore volume(0.48~0.8 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.

关 键 词：无烟煤 煤基活性多孔碳 煤层气 吸附分离 

分 类 号：X936[环境科学与工程—安全科学]