|
Y-ZSM-5 Zeolite-Zeolite Composites Prepared by the Steam-Assisted Conversion Method |
Author Name | Affiliation | E-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 |
Hits: 1346 |
Download times: 1233 |
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. |
View Full Text View/Add Comment Download reader |
|
|
|
|
|