Highly dispersed nickel catalyst promoted by precious metals for CO selective methanation

Woohyun Kim, Kee Young Koo, Heung Ju Lee, Yong Gun Shul, Wang Lai Yoon

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

For CO selective methanation, highly dispersed Ni-MgO/γ-Al2O3 catalysts have been prepared by the deposition-precipitation method. To enhance their low-temperature activity and selectivity to CO, four precious metals (Ru, Rh, Pt and Ir) to be impregnated onto the Ni-MgO/γ-Al2O3 catalysts have been chosen based on their physicochemical properties, e.g. H2-spillover and CO/CO2 affinities. Each precious metal (1 wt. %) has been added by the incipient wetness method and the catalytic performance tests have been carried out in a micro fixed-bed reactor. The gas hourly space velocity is 2400/h and the feed gas consists of 1 vol. % CO, 20 vol. % CO2, 57 vol. % H2, 15 vol. % steam and N2 balance. All the prepared catalysts have been characterized by BET, XRD, TPR, H2/CO-chemisorption and CO/CO2-TPD so the relationships between the catalytic performance and the promotion effects by the noble metal addition have been investigated. The experimental data reveals that the Ir-doped Ni catalyst shows the best performance (CO concentration < 10 ppm within 190-230 °C) due to enhanced reducibility and strong CO affinity.

Original languageEnglish
Pages (from-to)10033-10040
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number32
DOIs
Publication statusPublished - 2015 Aug 24

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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