Shape-Selective Zeolites Promote Ethylene Formation from Syngas via a Ketene Intermediate

Angewandte Chemie
Feng JiaoXinhe Bao

Abstract

Syngas conversion by Fischer-Tropsch synthesis (FTS) is characterized by a wide distribution of hydrocarbon products ranging from one to a few carbon atoms. Reported here is that the product selectivity is effectively steered toward ethylene by employing the oxide-zeolite (OX-ZEO) catalyst concept with ZnCrOx -mordenite (MOR). The selectivity of ethylene alone reaches as high as 73 % among other hydrocarbons at a 26 % CO conversion. This selectivity is significantly higher than those obtained in any other direct syngas conversion or the multistep process methanol-to-olefin conversion. This highly selective pathway is realized over the catalytic sites within the 8-membered ring (8MR) side pockets of MOR via a ketene intermediate rather than methanol in the 8MR or 12MR channels. This study provides substantive evidence for a new type of syngas chemistry with ketene as the key reaction intermediate and enables extraordinary ethylene selectivity within the OX-ZEO catalyst framework.

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Citations

Sep 12, 2018·Angewandte Chemie·Qiang ChenSheng-Gui He
Oct 18, 2018·Angewandte Chemie·Abhishek Dutta Chowdhury, Jorge Gascon
Sep 10, 2019·Advanced Materials·Miao YangZhongmin Liu
Jan 22, 2020·Angewandte Chemie·Yuxiang ChenXinhe Bao
May 7, 2020·Physical Chemistry Chemical Physics : PCCP·Ying LiXinbin Ma
Aug 29, 2018·Nature Communications·Youming NiZhongmin Liu
Mar 14, 2019·Nature Communications·Changli ZhuKui Xie
Mar 5, 2021·The Journal of Physical Chemistry Letters·Ke GongGuangjin Hou
May 18, 2021·Accounts of Chemical Research·Yeqing WangFeng-Shou Xiao
Apr 1, 2020·Journal of the American Chemical Society·Lei CaoYusuke Yamauchi
Sep 1, 2020·ACS Applied Materials & Interfaces·Zhengliang YinShunsheng Cao
May 11, 2018·Chemical Reviews·Michiel Dusselier, Mark E Davis
Sep 4, 2021·Journal of the American Chemical Society·Wei ChenAnmin Zheng

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