Effects of strontium and copper substitution on the catalytic performance of LaCoO3 in the combustion of methane: an optimization study

Document Type : Articles

Authors

Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran

Abstract

Cobalt-based perovskites containing strontium and copper (La1-xSrxCo1-yCuyO3) were synthesized by the sol-gel method and characterized by XRD, H2-TPR, N2-adsorbtion, XRF and XPS techniques. The XRD results showed that the rhombohedral structure of perovskites was obtained. The activation energy employed to analyze the activities of samples in the combustion of methane was optimized using full factorial design (FD) by considering strontium (x=0, 0.1 and 0.2) and copper (y=0, 0.25 and 0.5) as the input variables. Analysis of Variance (ANOVA) was employed to investigate the obtained data and a p

Graphical Abstract

Effects of strontium and copper substitution on the catalytic performance of LaCoO3 in the combustion of methane: an optimization study

Highlights

  • The sol-gel method was successfully employed in the synthesis of cobalt-based perovskites containing strontium and copper (La1-xSrxCo1-yCuyO3).
  • High activity could be due to the higher surface area, higher amounts of oxygen species, better reducibility and oxygen mobility.
  • At high concentrations of Sr and Cu, the segregated oxide phases and lower surface area of the investigated catalysts could be the main reasons for the lower catalytic combustion activity.

Keywords


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