X沸石/活性炭孔结构对CH_4/N_2分离的影响  

EFFECT OF PORE STRUCTURE OF ZEOLITE X/ACTIVATED CARBON COMPOSITE ON CH_4/N_2 SEPARATION

作　　者：薛彩龙[1] 程文萍[1] 崔杏雨[2] 马静红[2] 李瑞丰[1,2] 

机构地区：[1]太原理工大学化学化工学院,太原博士生030024 [2]太原理工大学精细化工研究所,太原高级工程师030024

出　　处：《煤炭转化》2015年第3期92-96,共5页Coal Conversion

基　　金：国家自然科学基金资助项目(51204120);中国博士后科学基金资助项目(2012M510782);山西省青年科技研究基金资助项目(2014021014-1);山西省自然科学基金资助项目(2012011005-6)

摘　　要：以煤矸石和沥青为主要原料制备X沸石/活性炭型体复合材料,并以酚醛树脂作为沉积剂,研究碳沉积对复合材料的孔结构及CH4和N2吸附分离性能的影响.X射线衍射、低温N2吸附/脱附和273K下CO2的吸附等温线表征结果表明,酚醛树脂可通过碳沉积的形式对复合材料中活性炭的微孔结构进行精细调节,随着碳沉积次数增加,微孔比表面积和微孔孔容降低,但其中0.45nm^0.55nm的微孔相对含量增加,微孔分布更加均一.复合材料在298K下对CH4和N2的吸附等温线测试结果表明,虽然碳沉积使得CH4和N2吸附容量降低,但CH4/N2分离比提高至2.7.Zeolite X/activated carbon composite was prepared from elutrilithe and pitch power, phenolic resin was used as carbon deposition material to adjust the pore structure of the composite, and the effect of carbon deposition numbers on the pore structure and gas adsorption separation ability of the composite material was investigated. The crystalline and pore structure of the samples were characterized by X-ray diffraction （XRD）, adsorption isotherms of N2 and CO2 at 77 K and 273 K. CH4 and N2 uptakes on the composites were determined for pressures up to 101 kPa at 298 K. The results show that the micropore structure of zeolite X/activated carbon composite is regulate finely after carbon deposition. With the increase of the carbon deposition numbers, the micropore surface area and the micropore volume decrease shapely, CH4 and N2 up- takes on the composites decrease, but the separation ratio of CH4/N2 increase. The separation ra- tio of CH4/Nz reaches 2.7, attribute to the micorpore of 0.45 nm-0. 55 nm increase for the forth carbon deposition.

关 键 词：沸石/活性炭 沉积 孔结构 气体分离 

分 类 号：X784[环境科学与工程—环境工程] TQ424[化学工程]