摘要
以无定形酸性硅铝材料ASA30和ZSM-35沸石为母体材料,通过复配制备了一系列组成不同的复合催化材料,并考察了其在1-己烯临氢异构化反应中的催化性能。利用N物理吸-脱附、NH-TPD和Py-IR等对复合催化材料的孔结构和酸性质进行研究。结果表明,复合催化剂的孔结构参数、酸类型、酸强度及强弱酸酸量随其组成发生有规律的变化。骨架异构化率及异构烷烃选择性最好的AZ-3/2在250℃就达到其最优异构化性能,骨架异构化率为84.81%,异构烷烃选择性为27.53%,异构烯烃选择性为57.28%,正构烷烃选择性仅为4.65%。此时L/B酸比例为2.3、中强酸/弱酸比例为5.26。
ASA30 zeolite and ZSM-35 zeolite,both amorphous acidic silica-alumina materials,are used as parent materials,a series of composite catalytic material with different compositions are prepared via compounding method,and their catalytic performance in the hydro-isomerization of 1-hexene is investigated.The pore structure and acidic properties of the composite catalytic material are studied by means of Nphysical adsorption-desorption,NH-TPD and Py-IR.The results show that the pore structure parameters,acid type,acid strength and the amounts of strong and weak acids of the composite catalyst change regularly with its composition.AZ-3/2 composite catalyst with the best skeletal isomerization rate and iso-alkanes selectivity can reach its optimal isomerization performance at 250℃,over which the skeletal isomerization rate of 1-hexene reaches 84.81%,the selectivity of iso-alkanes is 27.53%,the selectivity of iso-olefins is 57.28%,and the selectivity of n-alkanes is 4.65%.The ratio of L acid to B acid of AZ-3/2 is 2.3,and the ratio of medium strong acid to weak acid is 5.26.
作者
刘蕾
赵新红
姚文君
张文奇
向永生
LIU Lei;ZHAO Xin-hong;YAO Wen-jun;ZHANG Wen-qi;XIANG Yong-sheng(College of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China;Lanzhou Petrochemical Research Center,PetroChina Company Limited,Lanzhou 730060,China;PetroChina Hohhot Petrochemical Company,Hohhot 010070,China)
出处
《现代化工》
CAS
CSCD
北大核心
2022年第11期93-99,共7页
Modern Chemical Industry
基金
国家自然科学基金(21666019)。
关键词
烯烃临氢异构化反应
酸性硅铝材料
ZSM-35
烯烃骨架异构
骨架异构烷烃
hydro-isomerization of olefins
acidic silica-alumina materials
ZSM-35
skeletal isomerization of olefins
skeletal iso-alkanes
