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Porous Silica Coated Ceria as a Switch in Tandem Oxidative Dehydrogenation and Dry Reforming of Ethane with CO 2
Author(s) -
Li Yingchun,
Li Linyi,
Sun Wenjing,
Chen Congmei,
Luo Shizhong,
Shen Jun,
Jiang Chengfa,
Jing Fangli
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202100364
Subject(s) - dehydrogenation , ethylene , catalysis , materials science , desorption , selectivity , chemical engineering , alkane , inorganic chemistry , chemistry , organic chemistry , adsorption , engineering
The oxidative dehydrogenation of ethane using CO 2 as soft oxidant for the production of ethylene, possesses the features of valorization of light alkane and utilization of greenhouse gas. Although a significant challenge, the control of the reaction extent can provide a potential on‐purpose ethylene technology. In the present paper, CeO 2 is proposed to be a promising catalyst, while the deep oxidation process of dry reforming is preferred. The SiO 2 coated CeO 2 catalyst can render the reaction more selective towards ethylene. Through high sensitivity low energy ion scattering spectroscopy, findings were made that SiO 2 only partially covered CeO 2 in the Si 0.1 CeO 2 sample, in which the ethylene selectivity was 2.7 times as high as that of the bulk CeO 2 based on the same conversion level. Further, density functional theory calculations also demonstrated that the presence of the SiO 2 layer was more conducive to the desorption of ethylene.