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烟煤制备成型活性炭及其PSA浓缩CH4/N2中CH4的性能研究

Study on the preparation of shaped active carbon by bituminous coal and its performance for concentrating methane from CH4/N2 by pressure swing adsorption

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【作者】 辜敏刘克万鲜学福曾来姚伟静

【Author】 GU Min,LIU Ke-wan,XIAN Xue-fu,ZENG Lai,YAO Wei-jing (Key Laboratory for the Exploitation of Southwest Resources & the Environmental Disaster Control Engineering Under the State Ministry of Education,College of Resources and Environmental Science,Chongqing University,Chongqing 400044,China)

【机构】 重庆大学资源及环境科学学院西南资源开发及环境灾害控制工程教育部重点实验室

【摘要】 以重庆烟煤为原料,采用碳化-活化-气相沉积工艺制备了变压吸附(PSA)浓缩CH4/N2中CH4用的成型活性炭,考察了制备工艺条件对活性炭浓缩CH4/N2中CH4效果的影响。用低温液氮吸附方法对活性炭的孔结构进行了表征。实验结果表明,制备的成型活性炭在单循环五步PSA过程的抽真空步骤可使CH4的浓度较原料气提高20.0%(体积分数)左右。对浓缩效果为20%(体积分数)的AC-1活性炭进行了表征,其BET比表面积为580m2/g,微孔孔容为0.14cm3/g,孔径分布主要集中在2.0~4.0nm。

【Abstract】 Shaped active carbon adsorbents using bituminous coal from Chonqing mine as raw material for concentrating methane from CH4/N2 mixtures were prepared by taking carbonization-activation-deposition process and the effect of the preparation conditions on the pressure swing adsorption(PSA) concentrating performance was studied.The micro-structure characterization of active carbon was investigated by low temperature liquid nitrogen adsorption method.Experimental results showed that the methane concentration had increased 20.0vol% at the vacuum stage of PSA process with five steps using the shaped active carbon prepared as absorbent.As for one of the shaped active carbon adsorbents which concentrating effect was 20vol%,its BET specific surface area was 580m2/g,total micropore volume was 0.14cm3/g and its pore diameter size distribution was mostly between 2.0 and 4.0nm.

【基金】 国家自然科学基金资助项目(50774104);国家自然科学创新群体基金资助项目(50621403);教育部重点资助项目(107090);国家高技术研究发展计划(863计划)资助项目(2006AA06Z234)
  • 【文献出处】 功能材料 ,Journal of Functional Materials , 编辑部邮箱 ,2010年02期
  • 【分类号】TQ424.11
  • 【被引频次】19
  • 【下载频次】359
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