摘要
运用智能重量分析仪研究了ZSM-5分子筛对2-甲基戊烷和正己烷吸附脱附及扩散行为,并与5A分子筛进行了对比。结果表明,相比于传统的5A分子筛,ZSM-5分子筛对甲基戊烷吸附容量显著增大,提升了近26倍;ZSM-5分子筛对正己烷的吸附容量比5A分子筛低,但由于其更易于脱附,使其在单位质量吸附剂的情况下,正己烷单循环脱附量与5A分子筛相近;甲基戊烷在ZSM-5分子筛上的吸附热仍较大,且扩散系数较小,导致脱附温度较高。因此,可进一步通过优化ZSM-5分子筛传质性能制备出性能优异的石脑油吸附分离吸附剂。
The adsorption/desorption and diffusion properties of methylpentane and n-hexane on ZSM-5,5 Azeolites were investigated by using the intelligent gravimetric analyzer（IGA-003）.The results indicated that ZSM-5 zeolite has higher adsorption capacity for methylpentane which is almost 26 times bigger than that of 5 Azeolite.Moreover,adsorption capacity of n-hexane on a ZSM-5 is lower than that of a 5 A,but the single-cycle desorbed amount of n-hexane on a ZSM-5 is similar to that of 5 Adue to the easy release properties.Unfortunately,the adsorption heat and diffusion resistance of methyl pentane on the studied ZSM-5 remain high result in the high desorption temperature.Therefore,the excellent naphtha adsorbent maybe prepared by optimizing the mass transfer quality of ZSM-5.The results can provide important basic data for the optimal selection of the excellent adsorbent for naphtha.
作者
田鹏
王焕
莫周胜
秦玉才
李强
宋丽娟
Tian Peng;Wang Huan;Mo Zhousheng;Qin Yucai;Li Qiang;Song Lijuan(l.Liaoning Provincial Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University ,Fushun Liaoning 113001 ,China;College of Chermistry ＆ Chemical Engineering, China University of Petroleum （East China ）, Qingdao Shandong 266426 ,China)
出处
《石油化工高等学校学报》
CAS
2018年第3期16-21,共6页
Journal of Petrochemical Universities
基金
国家自然科学基金项目(U1662135)
关键词
吸附分离
甲基烷烃
ZSM-5分子筛
脱附量
吸附速率
Adsorption separation
Methylalkanes
ZSM 5 zeolite
Desorption capacity
Adsorption rate
