Synthesis of Higher Alcohols via Syngas on Cu/Zn/Si Catalysts. Effect of Polyethylene Glycol Content

Cu/Zn/Si catalysts with different polyethylene glycol (PEG) content were prepared by a complete liquid-phase method, and characterized by XRD, H 2 -TPR, N 2 -adsorption, and XPS. The influence of PEG content on the higher alcohols synthesis from syngas was investigated. The results showed that addit...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2018-05, Vol.92 (5), p.884-888
Main Authors: Cui, Rong-Ji, Yan, Xing, Fan, Jin-Chuan, Huang, Wei
Format: Article
Language:English
Subjects:
Alcohol
Alcohols
Catalysis
Catalysts
Chemical Kinetics and Catalysis
Chemistry
Chemistry and Materials Science
Copper oxides
Physical Chemistry
Polyethylene glycol
Selectivity
Surface properties
Synthesis gas
X ray photoelectron spectroscopy
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Summary:Cu/Zn/Si catalysts with different polyethylene glycol (PEG) content were prepared by a complete liquid-phase method, and characterized by XRD, H 2 -TPR, N 2 -adsorption, and XPS. The influence of PEG content on the higher alcohols synthesis from syngas was investigated. The results showed that addition of PEG can influence the texture and surface properties of the catalysts, and therefore affect their activity and product distribution. With an increase in PEG content, BET surface area, Cu crystallite size and surface active ingredient content of the catalysts first increased and then decreased, the CO conversion had similar variation tendency. However, the pore volume and pore diameter of the catalyst increased, and the binding energy of the active component and the content of Cu 2 O decreased, which resulted in higher catalyst selectivity towards higher alcohols. The highest C 2+ OH selectivity in total alcohols was 60.6 wt %.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024418050059