Jump to main content
Jump to site search

Issue 11, 2018
Previous Article Next Article

Binary ZnO/Zn–Cr nanospinel catalysts prepared by a hydrothermal method for isobutanol synthesis from syngas

Author affiliations

Abstract

A series of binary ZnO/Zn–Cr nanospinel catalysts were prepared by a hydrothermal method and applied in direct synthesis of isobutanol from syngas, during which the effect of the hydrothermal time/temperature on the catalytic performance in the isobutanol synthesis has been investigated at 400 °C and 10 MPa. The catalysts were characterized by XRD, N2 adsorption–desorption, TPR, TPD, FT-IR spectroscopy, XPS, XRF, SEM and TEM. The XRD and TEM results show that the binary ZnO/Zn–Cr nanospinel structure forms well by the hydrothermal method. Compared with other ZnCr catalysts, the catalyst prepared under the hydrothermal conditions of 16 h and 160 °C has the largest BET area with the largest amount of active sites, leading to a high total alcohol production rate (TAPR). Meanwhile, the surface Zn/Cr molar ratio (1.27) and K content (1.64%) on the ZnCr-16-160 catalyst are higher. The enrichment phenomenon of Zn on the catalyst surface could improve the interaction between ZnO and a non-stoichiometric Zn–Cr spinel, forming a ZnO layer mixed with the Zn–Cr spinel. Since K is known as a C-chain increasing promoter, the high K content is helpful in improving the total alcohol and isobutanol selectivity. Thus, the appropriate hydrothermal time and temperature for the binary ZnO/Zn–Cr catalyst preparation are 16 h and 160 °C, respectively, and the best catalytic performance is obtained on the ZnCr-16-160 catalyst with a total alcohol selectivity of 60.2% and an isobutanol distribution of 27.0 wt%.

Graphical abstract: Binary ZnO/Zn–Cr nanospinel catalysts prepared by a hydrothermal method for isobutanol synthesis from syngas

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Jan 2018, accepted on 03 May 2018 and first published on 04 May 2018


Article type: Paper
DOI: 10.1039/C8CY00030A
Citation: Catal. Sci. Technol., 2018,8, 2975-2986
  •   Request permissions

    Binary ZnO/Zn–Cr nanospinel catalysts prepared by a hydrothermal method for isobutanol synthesis from syngas

    X. Gao, Y. Wu, T. Zhang, L. Wang, X. Li, H. Xie and Y. Tan, Catal. Sci. Technol., 2018, 8, 2975
    DOI: 10.1039/C8CY00030A

Search articles by author

Spotlight

Advertisements