低碳化学与化工2025，Vol.50Issue(7)：45-50,6.DOI:10.12434/j.issn.2097-2547.20240356
中空Zn/ZSM-5催化剂制备及其丙烷芳构化反应催化性能研究
Study on preparation of hollow Zn/ZSM-5 catalysts and their catalytic performances for propane aromatization
摘要
Abstract
In order to improve the anti-coking performance of the conventional zeolite catalyst,a series of Zn/ZSM-5 catalysts(Zn/ZSM-5(t),t is the secondary crystallization time)with Zn mass fraction of 2%were prepared by the secondary crystallization treatment of ZSM-5 using tetrapropylammonium hydroxide(TPAOH).Zn/ZSM-5(t)were characterized by XRD,TEM,N2 absorption/desorption,etc.And the catalytic performances of the catalysts were investigated.The results show that during the desilication and recrystallization process,Si species inside ZSM-5 can be removed by OH-,and then recrystallize on the surface of ZSM-5 under the action of tetrapropylammonium cation(TPA+),so that the catalysts form a hollow structure.With the increase of secondary crystallization time,the relative crystallinities,mesoporous volumes and shell thicknesses of Zn/ZSM-5(t)increase gradually,while the acid strengths and acid amounts of the catalysts decrease gradually.Under the conditions of propane flow rate of 5 mL/min and temperature of 600℃for 4 h,Zn/ZSM-5(36)exhibits the best catalytic performance with propane conversion rate and aromatic selectivity(such as benzene,methylbenzene)of 80.0%and 70.6%,respectively.In addition,Zn/ZSM-5(36)has good anti-carbon deposition performance with carbon deposition amount of 1.8%after reaction for 4 h.关键词
中空结构/二次晶化/丙烷芳构化/Zn/ZSM-5催化剂Key words
hollow structure/secondary crystallization/propane aromatization/Zn/ZSM-5 catalysts分类
化学化工引用本文复制引用
徐国皓,方佳璐,罗帅,胡永康..中空Zn/ZSM-5催化剂制备及其丙烷芳构化反应催化性能研究[J].低碳化学与化工,2025,50(7):45-50,6.基金项目
安徽省高校自然科学重点项目(2023AH050416) （2023AH050416）
阜阳师范大学博士科研启动经费(2023KYQD0006) （2023KYQD0006）
省级创新训练项目(S02410371077) （S02410371077）
校级青年人才重点项目(S02410371077). （S02410371077）
