title: Direct observation of cyclic carbenium ions and their role in the catalytic cycle of the methanol-to-olefin reaction over chabazite zeolites.
abstract: Carbenium ions in zeolites: Two important carbenium ions have been observed for the first time under working conditions of the methanol-to-olefins (MTO) reaction over chabazite zeolites using (13) C NMR spectroscopy. Their crucial roles in the MTO reaction cycles have been demonstrated by combining experiments and theoretical calculations.
authors.affiliation: National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (P. R. China).
authors.forename: Shutao
authors.initials: S
authors.lastname: Xu
authors.forename: Anmin
authors.initials: A
authors.lastname: Zheng
authors.forename: Yingxu
authors.initials: Y
authors.lastname: Wei
authors.forename: Jingrun
authors.initials: J
authors.lastname: Chen
authors.forename: Jinzhe
authors.initials: J
authors.lastname: Li
authors.forename: Yueying
authors.initials: Y
authors.lastname: Chu
authors.forename: Mozhi
authors.initials: M
authors.lastname: Zhang
authors.forename: Quanyi
authors.initials: Q
authors.lastname: Wang
authors.forename: You
authors.initials: Y
authors.lastname: Zhou
authors.forename: Jinbang
authors.initials: J
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Deng
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Liu
keywords: carbenium ions; density functional calculations; methanol; olefins; zeolites