title: Observation of heptamethylbenzenium cation over SAPO-type molecular sieve DNL-6 under real MTO conversion conditions.
abstract: The heptamethylbenzenium cation (heptaMB(+)) has been speculated to be one of the most important active intermediates involved in the "hydrocarbon pool" mechanism of methanol-to-olefin (MTO) conversion. By the use of DNL-6, a newly synthesized SAPO-type molecular sieve with large cavities, heptaMB(+) has for the first time been directly observed during methanol conversion under real working conditions. (13)C-labeling experiments suggested that olefin formation mediated by heptaMB(+) mainly follows the side-chain mechanism.
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, PR China.
authors.forename: Jinzhe
authors.initials: J
authors.lastname: Li
authors.forename: Yingxu
authors.initials: Y
authors.lastname: Wei
authors.forename: Jingrun
authors.initials: J
authors.lastname: Chen
authors.forename: Peng
authors.initials: P
authors.lastname: Tian
authors.forename: Xiong
authors.initials: X
authors.lastname: Su
authors.forename: Shutao
authors.initials: S
authors.lastname: Xu
authors.forename: Yue
authors.initials: Y
authors.lastname: Qi
authors.forename: Quanyi
authors.initials: Q
authors.lastname: Wang
authors.forename: You
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yanli
authors.initials: Y
authors.lastname: He
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Liu