A catalytic process for the synthesis of light olefins from CH3Br over Zn-modified SAPO-34 molecular sieve

CATEGORY: OLEFINS 
A catalytic process for the synthesis of light olefins from CH3Br over Zn-modified SAPO-34 molecular sieve

Type	Journal Article
Author	Ying-Ying Zhang
Author	Lang Chen
URL	http://link.springer.com/article/10.1007/s11144-015-0841-4
Volume	115
Issue	2
Pages	691-701
Publication	Reaction Kinetics, Mechanisms and Catalysis
Date	2015/03/11
Abstract	Describes a process for the generation of light olefins (C 2 = + C 3 = ) from CH3Br using SAPO-34 and Zn-modified SAPO-34 (ZnAPSO-34s) molecular sieve as catalysts. Compared to SAPO-34, the ZnAPSO-34 catalysts exhibit enhanced CH3Br conversion and C 2 = + C 3 = selectivity for this catalytic reaction. This is especially so over ZnAPSO-34 with a Zn/Si molar ratio of 0.02 (Zn34-20), giving a C 2 = + C 3 = yield of 73.3 % at a CH3Br conversion of 92 %. Characterization results enabled exploration of the relationship between particle size, acidity and catalytic efficiency.