Mechanisms of the Deactivation of SAPO-34 Materials with Different Crystal Sizes Applied as MTO Catalysts
作者： Weili Dai , Guangjun Wu , Landong Li , Naijia Guan , Michael Hunger
DOI: 10.1021/CS400007V
关键词: Chemistry 、 Selectivity 、 Spectroscopy 、 Olefin fiber 、 Catalysis 、 Alkyl 、 Crystal 、 Photochemistry 、 Fourier transform infrared spectroscopy 、 Brønsted–Lowry acid–base theory
摘要: SAPO-34 materials with comparable Bronsted acid site density but different crystal sizes were applied as methanol-to-olefin (MTO) catalysts to elucidate the effect of size on their deactivation behaviors. 13C HPDEC MAS NMR, FTIR, and UV/vis spectroscopy employed monitor formation nature organic deposits, densities accessible sites active hydrocarbon-pool species studied a function time-on-stream (TOS) by 1H NMR spectroscopy. The above-mentioned spectroscopic methods gave very complex picture mechanism consisting number steps. most important these steps is alkyl aromatics large chains improving at first olefin selectivity, hindering reactant diffusion after longer TOS. hindered leads surplus retarded olefinic reaction products in pores accompanied oligomerization polycyclic a...
acs.org
sci-hub.se 参考文章(45)
Kwang Young Lee, Ho-Jeong Chae, Soon-Yong Jeong, Gon Seo, None, Effect of crystallite size of SAPO-34 catalysts on their induction period and deactivation in methanol-to-olefin reactions Applied Catalysis A-general. ,vol. 369, pp. 60- 66 ,(2009) , 10.1016/J.APCATA.2009.08.033
De Chen, Kjell Moljord, Terje Fuglerud, Anders Holmen, The effect of crystal size of SAPO-34 on the selectivity and deactivation of the MTO reaction Microporous and Mesoporous Materials. ,vol. 29, pp. 191- 203 ,(1999) , 10.1016/S1387-1811(98)00331-X
Yasuyoshi Iwase, Ken Motokura, To-ru Koyama, Akimitsu Miyaji, Toshihide Baba, None, Influence of Si distribution in framework of SAPO-34 and its particle size on propylene selectivity and production rate for conversion of ethylene to propylene Physical Chemistry Chemical Physics. ,vol. 11, pp. 9268- 9277 ,(2009) , 10.1039/B911659A
Jinzhe Li, Yingxu Wei, Guangyu Liu, Yue Qi, Peng Tian, Bing Li, Yanli He, Zhongmin Liu, Comparative study of MTO conversion over SAPO-34, H-ZSM-5 and H-ZSM-22: Correlating catalytic performance and reaction mechanism to zeolite topology Catalysis Today. ,vol. 171, pp. 221- 228 ,(2011) , 10.1016/J.CATTOD.2011.02.027
Marie-Ange Djieugoue, A. M. Prakash, Larry Kevan, Catalytic Study of Methanol-to-Olefins Conversion in Four Small-Pore Silicoaluminophosphate Molecular Sieves: Influence of the Structural Type, Nickel Incorporation, Nickel Location, and Nickel Concentration Journal of Physical Chemistry B. ,vol. 104, pp. 6452- 6461 ,(2000) , 10.1021/JP000504J
Norikazu Nishiyama, Masumi Kawaguchi, Yuichiro Hirota, Dung Van Vu, Yasuyuki Egashira, Korekazu Ueyama, Size control of SAPO-34 crystals and their catalyst lifetime in the methanol-to-olefin reaction Applied Catalysis A-general. ,vol. 362, pp. 193- 199 ,(2009) , 10.1016/J.APCATA.2009.04.044
Stian Svelle, Unni Olsbye, Finn Joensen, Morten Bjørgen, Conversion of Methanol to Alkenes over Medium-and Large-Pore Acidic Zeolites : Steric Manipulation of the Reaction Intermediates Governs the Ethene/Propene Product Selectivity Journal of Physical Chemistry C. ,vol. 111, pp. 17981- 17984 ,(2007) , 10.1021/JP077331J
L PETKOVIC, D GINOSAR, K BURCH, Supercritical fluid removal of hydrocarbons adsorbed on wide pore zeolite catalysts Journal of Catalysis. ,vol. 234, pp. 328- 339 ,(2005) , 10.1016/J.JCAT.2005.06.027
Ji Won Park, Gon Seo, IR study on methanol-to-olefin reaction over zeolites with different pore structures and acidities Applied Catalysis A-general. ,vol. 356, pp. 180- 188 ,(2009) , 10.1016/J.APCATA.2009.01.001
Miles J. van Niekerk, Jack C.Q. Fletcher, Cyril T. O'Connor, Effect of catalyst modification on the conversion of methanol to light olefins over SAPO-34 Applied Catalysis A: General. ,vol. 138, pp. 135- 145 ,(1996) , 10.1016/0926-860X(95)00240-5