Intermediates and Dominating Reaction Mechanism During the Early Period of the Methanol-to-Olefin Conversion on SAPO-41

CATEGORY: METHANOL-TO-OLEFIN 
Intermediates and Dominating Reaction Mechanism During the Early Period of the Methanol-to-Olefin Conversion on SAPO-41

Type	Journal Article
Author	Weili Dai
Author	Michael Dyballa
URL	http://dx.doi.org/10.1021/jp5118757
Volume	119
Issue	5
Pages	2637-2645
Publication	The Journal of Physical Chemistry C
Date	February 5, 2015
Abstract	Researchers examined the formation and evolution of initial reaction intermediates as well as the reaction mechanism during the early period of the methanol conversion on the silicoaluminophosphate SAPO-41 with one-dimensional and 10-numbered ring pore system. Spectroscopic studies revealed detailed mechanistic insight into the induction period of the methanol conversion on SAPO-41. Monoenylic carbenium ions, the dominating species during the initial period of the methanol conversion, were rapidly formed and gradually transferred to dienylic carbenium ions, benzene-based carbenium ions, and trienylic carbenium ions, in addition to three-ring compounds and dienes with different chain lengths. Based on these spectroscopic observations and the catalytic results, authors disclose the olefin-based reaction cycle to be the dominating reaction mechanism in the initial period of the methanol conversion on SAPO-41.