Observation of Heptamethylbenzenium Cation over SAPO-Type Molecular Sieve DNL-6 under Real MTO Conversion Conditions

被引：187

作者：

Li, Jinzhe ^{[1
]}

Wei, Yingxu ^{[1
]}

Chen, Jingrun ^{[1
,2
]}

Tian, Peng ^{[1
]}

Su, Xiong ^{[1
,2
]}

Xu, Shutao ^{[1
]}

Qi, Yue ^{[1
]}

Wang, Quanyi ^{[1
,2
]}

Zhou, You ^{[1
,2
]}

He, Yanli ^{[1
]}

Liu, Zhongmin ^{[1
]}

机构：

[1] Chinese Acad Sci, Natl Engn Lab Methanol Olefins, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2012年 / 134卷 / 02期

基金：

中国国家自然科学基金;

关键词：

TO-OLEFIN CATALYSIS; HYDROCARBON POOL MECHANISM; ZEOLITE H-BETA; IN-SITU NMR; CARBENIUM IONS; CO-REACTION; METHANOL; HSAPO-34; DEACTIVATION; CHEMISTRY;

D O I：

10.1021/ja209950x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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. C-13-labeling experiments suggested that olefin formation mediated by heptaMB(+) mainly follows the side-chain mechanism.

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收藏

页码：836 / 839

页数：4

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