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›› 2012, Vol. 12 ›› Issue (5): 888-892.

• 材料工程专栏 • 上一篇    下一篇

无烟煤所制活性炭对CH4/N2的分离特性

张薄 辜敏 鲜学福   

  1. 重庆大学资源及环境科学学院煤矿灾害动力学与控制国家重点实验室 重庆大学资源及环境科学学院煤矿灾害动力学与控制国家重点实验室 重庆大学资源及环境科学学院煤矿灾害动力学与控制国家重点实验室
  • 收稿日期:2012-07-20 修回日期:2012-08-28 出版日期:2012-10-20 发布日期:2012-10-20
  • 通讯作者: 辜敏

Characteristics of Activated Carbon Prepared with Anthracite for Separation of CH4 and N2 Mixture

ZHANG Bo GU Min XIAN Xue-fu   

  1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University
  • Received:2012-07-20 Revised:2012-08-28 Online:2012-10-20 Published:2012-10-20
  • Contact: GU Min

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摘要： 以无烟煤为原料，采用预氧化-炭化-水蒸气活化法制备颗粒活性炭，用其变压吸附分离CH4/N2，以重量法测定了298 K下N2和CH4单组分及双组分气体在活性炭上的等温吸附曲线，并对活性炭的结构和表面性质进行了表征. 结果表明，以所制活性炭为吸附剂，采用单柱单循环变压吸附过程可将CH4/N2中CH4浓度最高提升30.7%(j). 所制活性炭孔结构以微孔为主且表面具有较多含氧官能团，对CH4/N2的分离效果较好，吸附选择性系数达3.4.

关键词: 活性炭, 无烟煤, CH4/N2, 变压吸附, 分离

Abstract: Granular activated carbon (GAC) was prepared by preoxidation-carbonization-vapor activation process using anthracite as raw material. The adsorption isotherms of CH4, N2 and CH4/N2 mixture were measured and the pore size distribution, surface functional group and crystal structure of GAC characterized. The results show that by a pressure swing adsorption process using single column and single cycle with the prepared GAC as adsorbent, the volume percentage of CH4 was increased by 30.7% maximally. The effective micropores for separation of CH4/N2 mixture occupied a great proportion. The oxygen-containing function groups on the surface of GAC were favorable for the separation of CH4/N2. The adsorption selective coefficient of CH4 on GAC was 3.4.

Key words: activated carbon, anthracite, CH4/N2, pressure swing adsorption, separation

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