Formulation of zeolite-mesoporous silica composite catalysts for light olefin production from catalytic cracking

作     者：Hassan Alhassawi Edidiong Asuquo Shima Zainal Yuxin Zhang Abdullah Alhelali Zhipeng Qie Christopher M.A.Parlett Carmine D’Agostino Xiaolei Fan Arthur A.Garforth 

作者机构：Department of Chemical EngineeringSchool of EngineeringThe University of ManchesterManchester M139PLUK Faculty of Environment and LifeBeijing University of TechnologyBeijing 100124China Diamond Light Source Harwell Science and Innovation CampusOxfordshire OX110DEUK University of Manchester at HarwellDiamond Light Source Harwell Science and Innovation CampusOxfordshire OX110DEUK UK Catalysis HubResearch Complex at HarwellRutherford Appleton LaboratoryOxfordshire OX110FAUK 

出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)

年 卷 期：2024年第18卷第11期

页      面：335-346页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：China Scholarship Council for his PhD secondment at The University of Manchester(CSC file No.201906120207) 

主　　题：zeolites mesoporous silica composite catalysts catalytic cracking light olefins 

摘      要：Framework materials such as zeolites and mesoporous silicas are commonly used for many applications,especially catalysis and *** zeolite-mesoporous silica composite catalysts(employing zeolite Y,ZSM-5,KIT-6,SBA-15 and MCM-41 mesoporous silica)were prepared(with different weight percent of zeolite Y and ZSM-5)and assessed for catalytic cracking(using n-heptane,as the model compound at 550°C)with the aim to improve the selectivity/yield of light olefins of ethylene and propylene from *** properties of the parent zeolites and the prepared composites were characterized comprehensively using several techniques including X-ray diffraction,nitrogen physisorption,scanning electron microscopy,fourier transform infrared spectroscopy,pulsed-field gradient nuclear magnetic resonance and thermogravimetric *** cracking results showed that the ZY/ZSM-5/KIT-6 composite(20:20:60 wt%)achieved a high n-heptane conversion of 85%with approximately 6%selectivity to ethylene/*** contrast,the ZY/ZSM-5/SBA-15 composite achieved a higher conversion of 95%and an ethylene/propylene ratio of 8%,indicating a more efficient process in terms of both conversion and *** resonance relaxation analysis of the ZY/ZSM-5/KIT-6(20:20:60)catalyst confirmed a micro-mesoporous environment that influences n-heptane diffusion and mass *** zeolite Y and ZSM-5 have micropores,n-heptane can move and undergo hydrogen transfer reactions,whereas KIT-6 has mesopores that facilitate n-heptane’s accessibility to the active sites of zeolite Y and ZSM-5.