Thermocatalytic decomposition of methane to low-carbon hydrogen using LaNi1-xCuxO3 perovskite catalysts

Zama G. Duma, Ashton Swartbooi, Nicholas M. Musyoka

Research output: Journal PublicationArticlepeer-review

Abstract

The thermocatalytic decomposition (TCD) of methane is an attractive alternative to produce low-carbon hydrogen and solid carbonaceous materials. In this study, substituted LaNi1-xCuxO3 perovskite catalysts prepared via self-combustion method were investigated for methane TCD. The effect of Ni partial substitution with Cu, varying gas hourly space velocity, temperature and stability on methane conversions were evaluated. PXRD, H2-TPR, SEM-EDS, TGA, and XPS were used to characterize the catalysts. An increase in Cu loading to 50%, increase in temperature and decrease in GHSV resulted in an improvement in methane conversions to 92%. At a GHSV of 2400 ml/gcat.h, no significant deactivation was observed as the stability of the LaNi0.5Cu0.5O3 catalyst increased from 6 to 20 hours’ TOS with methane conversions maintained at 92% where carbon nanofibers were observed on the surface of the spent catalysts. The study demonstrates the potential to prepare LaNi1-xCuxO3 catalysts and identify optimal testing conditions for the novel production of low-carbon hydrogen with minimal catalyst deactivation.

Original languageEnglish
Article number119703
JournalApplied Catalysis A: General
Volume677
DOIs
Publication statusPublished - 5 May 2024

Keywords

  • Gas Hourly Space Velocity
  • LaNiCuO3
  • Low-carbon hydrogen
  • Methane TCD
  • Perovskite

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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