Ultra-stable porous yolk-shell Ni catalysts for the steam reforming of methane with alkali poisoning

Kyung Won Jeon, Jin Koo Kim, Beom Jun Kim, Won Jun Jang, Yun Chan Kang, Hyun Seog Roh

Research output: Contribution to journalArticlepeer-review

Abstract

Hydrogen, a clean energy carrier, can be produced from renewable sources such as biomass and waste, but it is needed to develop new catalysts with high resistance against impurities. Ni/Al2O3 yolk-shell catalysts were prepared by different procedure for the steam reforming of methane reaction with alkali poisoning. Yolk-shell (ys) and porous yolk-shell (pys) materials were synthesized using a spray pyrolysis process. The physicochemical and structural properties of the prepared catalysts on the reaction performance and alkali resistance were investigated. All the yolk-shell catalysts exhibited high resistance to carbon deposition. The Ni/pys-Al2O3 catalyst showed the highest CH4 conversion and the best stability at a gas hourly space velocity of 932,492 mL·g−1·h−1 even upon exposure to alkali hydroxide vapor. It also showed strong resistance to sintering, whereas the structures of the ys-Ni-Al2O3 and Ni/ys-Al2O3 catalysts were relatively degraded under the same conditions.

Original languageEnglish
Article number140060
JournalChemical Engineering Journal
Volume454
DOIs
Publication statusPublished - 2023 Feb 15

Keywords

  • Alkali resistance
  • Carbon deposition
  • Ni/AlO catalysts
  • Porous yolk-shell
  • Steam reforming of methane

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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