The Combination of Calcium Oxide and Cu/ZrO<sub>2</sub> Catalyst and their Selective Products for CO<sub>2</sub> Hydrogenation

Authors

  • Soipatta Soisuwan Burapha University
  • Wilasinee Wisaijorn Burapha University
  • Chalida Nimnul Burapha University
  • Orawan Maunghimpan Burapha University
  • Piyasan Praserthdam Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2016.20.2.39

Keywords:

Calcium oxide, copper-based catalyst, CO2 hydrogenation.

Abstract

The catalytic activities of Cu/ZrO2_CaO catalysts were investigated on CO2 hydrogenation. The CO2 hydrogenations were carried out over combination of calcium oxide and Cu/ZrO2 catalyst. Two calcination temperatures were chosen at 300 and 650oC according to thermal decomposition results. The catalysts were characterized by means of N2 adsorption-desorption, H2 temperature programmed reduction and X-ray diffraction. The CO2 hydrogenation under atmospheric pressure and at 250oC was carried out over copper-based catalysts combined with calcium oxide namely i.e. Cu/ZrO2_CaO300, Cu/ZrO2_CaO650, Cu/ZrO2_Cu/CaO and Cu/ZrO2+CaO. The catalytic activities over all catalysts were consistent for 4 hours. The catalytic reaction rates over copper-based catalysts were in the range of 21.8 – 47.4 μmol L-1 s-1 g cat-1. The modification of calcium oxide can improve the catalytic activity of copper-based catalysts to 47.4 μmol L-1 s-1 g cat-1. The calcination temperature can cause a difference in active species that impact on product selectivity. The CaO consisting in copper-based catalysts, i.e. Cu/ZrO2_CaO650, facilitate the growth of long chain hydrocarbon, whereas Cu/ZrO2_CaO300 favors the formation of carbon monoxide plausibly arising from reverse water gas shift reaction. Directly combined calcium oxide with Cu/ZrO2 via physically mixing, i.e. Cu/ZrO2+CaO, can improve the rate of methanol production.

Downloads

Download data is not yet available.

Author Biographies

Soipatta Soisuwan

Department of Chemical Engineering, Faculty of Engineering, Burapha University, Chonburi, Thailand

Wilasinee Wisaijorn

Department of Chemical Engineering, Faculty of Engineering, Burapha University, Chonburi, Thailand

Chalida Nimnul

Department of Chemical Engineering, Faculty of Engineering, Burapha University, Chonburi, Thailand

Orawan Maunghimpan

Department of Chemical Engineering, Faculty of Engineering, Burapha University, Chonburi, Thailand

Piyasan Praserthdam

Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Published

Vol 20 No 2, May 18, 2016

How to Cite

[1]
S. Soisuwan, W. Wisaijorn, C. Nimnul, O. Maunghimpan, and P. Praserthdam, “The Combination of Calcium Oxide and Cu/ZrO<sub>2</sub> Catalyst and their Selective Products for CO<sub>2</sub&gt; Hydrogenation”, Eng. J., vol. 20, no. 2, pp. 39-48, May 2016.

Most read articles by the same author(s)