摘要
低浓度煤层气CH_(4)富集过程需要高性能CH_(4)/N_(2)吸附剂。采用水热法成功合成了T沸石,并利用PXRD、SEM和N_(2)吸/脱附等手段对其进行了表征。测试了T沸石的CH_(4)、N_(2)单组分吸附性能,计算了其理想吸附溶液理论(IAST)选择性和吸附热,并考察了T沸石的CH_(4)/N_(2)吸附分离性能。结果表明,在298 K、0.1 MPa条件下,T沸石(Tz-168)的CH_(4)吸附量为21.4 cm^(3)/g,CH_(4)/N_(2)选择性为5.5,优于大多数分子筛吸附剂。通过CH_(4)/N_(2)混合气穿透实验进一步验证了T沸石具有良好的CH_(4)/N_(2)吸附分离性能,V(CH_(4)):V(N_(2))为50:50和20:80时,实际分离时间分别为5 min和7 min,这在低浓度煤层气CH_(4)富集中具有较大的应用潜力。
The enrichment of CH_(4) in low-concentration coalbed methane requires high-performance CH_(4)/N_(2) adsorbents.T-zeolite was successfully synthesized using a hydrothermal method and characterized by PXRD,SEM,and N_(2) adsorption/desorption.The CH_(4) and N_(2) single-component adsorption performance of T-zeolite was tested,and its Ideal Adsorbed Solution Theory(IAST)selectivity and adsorption heat were calculated.The CH_(4)/N_(2) separation performance of T-zeolite was also investigated.The results show that at 298 K and 0.1 MPa,the CH_(4) adsorption capacity of T-zeolite(Tz-168)is 21.4 cm^(3)/g,and the CH_(4)/N_(2) selectivity of T-zeolite is 5.5,which is better than most molecular sieve adsorbents.CH_(4)/N_(2) mixture permeation experiments further confirm that T-zeolite exhibits excellent CH_(4)/N_(2) separation performance,with actual separation time of 5 min and 7 min at V(CH_(4)):V(N_(2))of 50:50 and 20:80,respectively.This has significant application potential in the enrichment of CH_(4) from low-concentration coalbed methane.
作者
刘晋芳
金晓宇
李媛
荀文杰
申芳芳
乔旭
王小青
杨江峰
LIU Jinfang;JIN Xiaoyu;LI Yuan;XUN Wenjie;SHEN Fangfang;QIAO Xu;WANG Xiaoqing;YANG Jiangfeng(Laboratory Branch for Clean Utilization of Coking Coal,Shanxi Coking Coal Group Co.,Ltd.,Taiyuan 030027,Shanxi,China;Shanxi Key Laboratory of Intelligent Evaluation and Efficient Utilization of Coking Coal,Taiyuan 030027,Shanxi,China;Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)
出处
《低碳化学与化工》
北大核心
2025年第7期67-71,108,共6页
Low-Carbon Chemistry and Chemical Engineering
基金
国家自然科学基金面上项目(22378287,22478272)。
