Copper promoted Co/MgO: A stable and efficient catalyst for glycerol steam reforming

Surendar Moogi, Lingaiah Nakka, S. Sai Prasad Potharaju, Ashfaq Ahmed, Abid Farooq, Sang Chul Jung, Gwang Hoon Rhee, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Different types of cobalt-based mixed oxide catalysts (20 wt%Co/MgO, 5 wt%Cu-20 wt% Co/MgO, 20 wt%Co/50%MgO–50%Al2O3) were synthesized by the co-precipitation method and applied for hydrogen production from glycerol steam reforming. The catalysts were characterized using X-ray diffraction (XRD), H2-Temperature-programmed reduction (H2-TPR), CO2-Temperature Programmed desorption, CO-Chemisorption, and CHN techniques. The H2-TPR analysis showed the reducibility of cobalt-oxide (5Cu20CM; 5 wt%Cu-20 wt% Co/MgO) was enhanced by the copper, and reduction profiles of cobalt oxide shifted to a lower temperature (<450 °C). Among the catalysts, 5Cu20CM showed a maximum yield of hydrogen (74.6%) with 100% conversion of glycerol to the gaseous phase. The superior catalytic performance of 5Cu20CM for glycerol conversion was attributed to the smaller particle size (7 nm), higher dispersion of cobalt (35.0%), and the higher surface area (56 m2/g) of cobalt metal. Furthermore, Raman spectroscopy of the spent catalysts confirmed that the copper promoted cobalt-magnesium catalyst suppressed the carbon formation, consequently, 5Cu20CM catalyst showed a stable performance up to 30 h.

Original languageEnglish
Pages (from-to)18073-18084
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume46
Issue number34
DOIs
StatePublished - 17 May 2021

Keywords

  • Cu promoted cobalt oxide catalyst
  • Glycerol steam reforming
  • Hydrogen production

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