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Y-ZSM-5 Zeolite-Zeolite Composites Prepared by the Steam-Assisted Conversion Method
Author NameAffiliationE-mail
GAO He-Xin Research Center of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China  
LI Peng Research Center of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China  
DU Yan-Ze Research Center of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China
Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun, Liaoning 113001, China 
 
ZHENG Jia-Jun Research Center of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China zhengjiajun@tyut.edu.cn 
PAN Meng Research Center of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China  
LIU Zhi-Ping Research Center of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China 1969938580@qq.com 
LI Rui-Feng Research Center of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, China  
Abstract: Y zeolite crystals is liable to be depolymerized because of the attack of alkali species on its frameworks,which even causes the framework collapse.During the synthesis of the zeolite-zeolite composite composed of FAU and MFI,the dissolution of Y zeolite crystals will change the composition of gel precursors yielding MFI zeolite phase.In present work,Y zeolite crystals,which was mixed with the gel precursors of ZSM-5,were modified with carbon membrane yielded from glucose by hydrothermally treatment at 180℃ for 3 h.Zeolite-zeolite composite consisting of FAU and MFI was therefore synthesized by the steam-assisted conversion (SAC) method.The factors affecting the formation of the composite were investigated in details.The as-synthesized samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),Fourier transform infrared (FT-IR) spectroscopy,N2 adsorption-desorption,energy dispersive X-ray spectroscopy (EDS),and NH3-TPD.The results showed that the precursors yielding ZSM-5 zeolite gradually transfered from a worm-like morphology to nano-sized MFI zeolite crystals.As compared with the pure Y,ZSM-5 or the corresponding physical mixture of Y and ZSM-5 with the similar composition and ratio,the activity and catalytic life of the zeolite composite investigated during the isopropylbenzene catalytic crack fall between those of the single Y and ZSM-5 catalysts,while significantly better than those of the corresponding physical mixture.
Keywords: zeolite  composites  steam-assisted conversion method  catalytic crack
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GAO He-Xin,LI Peng,DU Yan-Ze,ZHENG Jia-Jun,PAN Meng,LIU Zhi-Ping,LI Rui-Feng.Y-ZSM-5 Zeolite-Zeolite Composites Prepared by the Steam-Assisted Conversion Method[J].Chinese Journal of Inorganic Chemistry,2017,33(7):1249-1256.
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Chinese Journal of Inorganic Chemistry