Bridging the molecular mechanism and industrial process of zeolite-catalyzed methanol conversion to olefins and ethanol using advanced solid-state NMR spectroscopy
Jing Niu, Xinzhi Ding, Shutao Xu, Yingxu Wei, Zhongmin Liu
Abstract
Zeolite-catalyzed methanol-to-olefin (MTO) and methanol-to-ethanol (MTE) reactions have achieved significant breakthroughs in both industry and academia, proving to be mature alternative pathways for producing basic chemicals from non-oil resources. The successful transition of these catalytic processes from laboratory to industrial implementation has been propelled by fundamental breakthroughs in the comprehensive understanding of reaction mechanisms. In this context, solid-state nuclear magnetic resonance (ssNMR) spectroscopy has emerged as an indispensable tool for elucidating catalyst structures, catalytic reaction mechanisms, and the interactions and dynamics of reactant molecules in these industrially important processes. This review specifically focuses on the application of ssNMR spectroscopy in industrially mature MTO and dimethyl ether (DME) carbonylation processes, which serve as representative examples of zeolite-catalyzed industrial processes. Based on this molecular-level information from spectroscopic observations combined with theoretical methods, this review aims to bridge the fundamental understandings of reaction mechanisms with practical applications, including the rationalization of catalysts, the optimization of catalytic performance, and the improvement of industrial processes.