1. School of Mechanical Engineering,University of Science and Technology Beijing,Beijing　 100083,China;2. Beijing Engineering Research Center for Energy Saving and Environmental Protection,University of Science and Technology Beijing,Beijing　 100083,China

为探究基于动力学分离效应的碳分子筛对含氧煤层气的吸附分离特性,对煤层气中CH4,N2,O2三种气体在两种商业碳分子筛（CMS-1,CMS-2）上的吸附动力学和平衡吸附特性开展了研究。结果表明:这两种碳分子筛对CH4的平衡吸附量均大于N2和O2,为甲烷选择性吸附剂;通过扩散模型的模拟和分析指出,采用分段微孔扩散模型能够很好地预测3种气体在碳分子筛上的动态吸附过程;CH4,N2,O2三种气体分别在Fc为0.5,0.6,0.7之前呈现较快的扩散速率,随后扩散速率明显变慢。CMS-1,CMS-2两种碳分子筛均存在动力学吸附特性和平衡分离特性相互抑制的现象,N2,O2与CH4的综合分离因子分别为5.84,18.75,4.20,16.82,表明这两种碳分子筛均具有较好的煤层气的脱氧浓缩性能。

In order to study the separation characteristics of coalbed methane on carbon molecular sieve (CMS) which is depend on the effect of kinetics,the adsorption kinetics data and equilibrium isotherms of CH4 ,N2 and O2 on two kinds of CMS ( CMS - 1, CMS - 2) were measured and modeled. The results show that the equilibrium adsorption amounts of CH4 greater than N2 and O2 on the two kinds of CMS;the micro pore diffusion model can forecast the ad- sorption kinetics of CH4 ,N2 and O2 on CMS well;The diffusion rates of CH4 ,N2 and O2 were fast when F is less than Fc which were 0. 5,0. 6 and 0. 7,and after that the diffusion rates drop obviously. On the two kinds of CMS,the com- prehensive selectivity of N2 and O2 or CH4 are 5. 84,18. 75,4. 20 and 16. 82 which indicate that the two kinds of CMS could be used to enrich CH4 from coalbed methane.

国家自然科学基金资助项目(51306017)；北京市自然科学基金资助项目(3144032)；中央高校基本科研业务费专项资金资助项目(FRF-TP-13-011A)；

Liu Yingshu,Zhang Erlin,Yang Xiong,et al. Adsorption kinetics of oxygen-bearing coalbed methane on carbon molecular sieves[J]. Jour- nal of China Coal Society,2016,41(4):864-870.