Syngas production by combined steam and CO2 reforming of coke oven gas over highly sinter-stable La-promoted Ni/MgAl2O4 catalyst

Ji Eun Park, Kee Young Koo, Un Ho Jung, Jin Hyang Lee, Hyun Seog Roh, Wang Lai Yoon

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Highly sinter-stable 10 wt% Ni-xLa/MgAl2O4 (x = 0-5 wt%) catalysts were prepared by co-impregnation for the combined steam and CO2 reforming (CSCR) of coke oven gas (COG). The physicochemical properties of the catalysts were analyzed by BET, XRD, H2 chemisorption, and H2-TPR. To compare the sinterstabilities, aging treatment was performed at 900 °C under H2:H2O:N2 = 1:10:1.25 for 50 h. Although the Ni dispersions decrease and Ni crystallite sizes increase for all of catalysts after the aging treatment, the La-promoted catalysts had higher Ni dispersion and smaller crystallite sizes than the Ni/MgAl2O4 catalyst owing to the enhancement of strong metal-support interactions. The catalytic test was carried out under CH4:H2O:CO2:H2:CO:N2 = 1:1.2:0.4:2:0.3:0.3 at 900 °C and 5 atm for 40 h. The Ni-2.5La/MgAl2O4 (aged) catalyst exhibited the highest activity and sinterstability owing to its high surface area and Ni dispersion. It was also confirmed that La promotion prevents the agglomeration of Ni particles through TEM.

Original languageEnglish
Pages (from-to)13909-13917
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number40
DOIs
Publication statusPublished - 2015 Oct 26

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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