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Issue 33, 2017, Issue in Progress
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The role of non-stoichiometric spinel for iso-butanol formation from biomass syngas over Zn–Cr based catalysts

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Abstract

A series of Zn–Cr based catalysts modified by K promoter has been prepared by different methods and their performances for iso-butanol formation from biomass syngas were investigated in a fixed bed reactor. The ZnCr-c catalyst which was prepared by co-precipitation method showed the best catalytic performance for iso-butanol formation, over which ca. 30% of CO conversion and ca. 20% of iso-butanol selectivity were achieved. Multi-characterization studies were then conducted to reveal the internal causes for different performances for iso-butanol formation over different catalysts including high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). The results reveal that ZnCr-c catalyst contains the maximum amount of non-stoichiometric spinel among all the catalysts. This fact implies that the non-stoichiometric spinel is the active phase for iso-butanol synthesis from syngas. The reducibility, texture parameters and basic property of catalysts are further important factors for the formation of iso-butanol over Zn–Cr based catalysts from biomass syngas.

Graphical abstract: The role of non-stoichiometric spinel for iso-butanol formation from biomass syngas over Zn–Cr based catalysts

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Supplementary files

Article information


Submitted
03 Mar 2017
Accepted
17 Mar 2017
First published
06 Apr 2017

This article is Open Access

RSC Adv., 2017,7, 20135-20145
Article type
Paper

The role of non-stoichiometric spinel for iso-butanol formation from biomass syngas over Zn–Cr based catalysts

S. Tian, S. Ding, Q. Yang, H. Ren, Q. Ma, Y. Zhao and Z. Miao, RSC Adv., 2017, 7, 20135
DOI: 10.1039/C7RA02627G

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