结合改性硅胶对模拟煤层气中CH_(4)/CO_(2)的吸附分离研究  

Adsorption and Separation of CH_(4)/CO_(2)in Simulated Coalbed Methane with Modified Silica Gel

作　　者：倪诸希 何胜 张勇 程银 王里奥[1,2] 宋雪[1,2] 王磊[1,2] 詹欣源 NI Zhuxi;HE Sheng;ZHANG Yong;CHENG Yin;WANG Li'ao;SONG Xue;WANG Lei;ZHAN Xinyuan(State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China;College of Environment and Ecology,Chongqing University,Chongqing 400044,China;Chongqing Water Assets Management Co.,Ltd,Chongqing 400044,China)

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044 [2]重庆大学环境与生态学院,重庆400044 [3]重庆水务资产经营有限公司,重庆400044

出　　处：《矿业研究与开发》2021年第2期138-143,共6页Mining Research and Development

基　　金：国家科技支撑计划项目(2014BAC29B01).

摘　　要：利用碱土金属(Ba)和乙醇胺(MEA)对硅胶吸附剂(SGA)进行结合改性得到改性硅胶吸附剂(SGA-MEA-Ba),对改性前后硅胶的理化性质、再生性能及其对模拟煤层气中CH_(4)/CO_(2)混合气的分离效果进行分析。结果表明,经过碱土金属(Ba)和乙醇胺结合改性的SGA的比表面积和总孔体积均有所下降;SGA改性前后其主要官能团基本相同,改性后出现了—NH_(2);除了改性后的SGA中多了Ba元素的衍射峰外,改性前后其余物相结构没有特别的改变。经过碱土金属(Ba)和乙醇胺的结合改性的SGA对CO_(2)的吸附量增大,从1.34mmol/g增加到了3.30mmol/g,同时对CO_(2)/CH4混合气的分离效果增强,对CO_(2)/CH4混合气的分离比从9.14提高到了9.92。The modified silica gel adsorbent(SGA-MEA-Ba)was obtained by combining alkaline-earth metal(Ba)and ethanolamine(MEA)to modify silica gel adsorbent(SGA).The physical and chemical properties,regeneration performance of the silica gel before and after modification were analyzed,as well as their separation effects of CH_(4)/CO_(2)mixture in simulated coalbed methane.The results are concluded as follows.Firstly,the specific surface area and total pore volume of the SGAMEA-Ba decrease.Secondly,the main functional groups of the SGA before and after modification are basically the same,and—NH2appears after modification.Thirdly,except for the diffraction peak of Ba element in the SGA-MEA-Ba,there is no special change in the other phase structure before and after modification.Finally,for the SGA-MEA-Ba,the adsorption capacity of CO_(2)increased from 1.34mmol/g to 3.30mmol/g,and the separation ratio of CO2/CH4mixture was enhanced from 9.14to 9.92.

关 键 词：硅胶 氯化钡 乙醇胺 改性 吸附分离 

分 类 号：TD844[矿业工程—煤矿开采]