Comparison of preparation methods for improving coke resistance of Ni-Ru/MgAl₂O₄ catalysts in dry reforming of methane for syngas production

ABSTRACT

A small loading of highly dispersed Ru on Ni/MgAl₂O₄ catalyst was investigated in the dry reforming of methane (DRM) process. The catalysts were synthesized by impregnation and deposition-precipitation methods; the DRM reaction was performed at CH₄/CO₂/N₂ = 1/1/1 and 600‒750°C. The bimetallic Ni‒Ru catalysts exhibited improved reducibility and metal dispersion compared with that of the Ni catalyst. Among the synthesized catalysts, the Ru(D)/Ni(I)/MgAl₂O₄ catalyst had the highest metal dispersion (7.23%) and largest amount of CO₂ desorption (135 μmol/g). Thus, this catalyst exhibited the highest CH₄ conversion (85.6%) at 750°C. Additionally, coke deposition of only 2.69% occurred during the stability test.

KEYWORDS:

• Coke resistance
• syngas
• bimetallic catalyst
• Ru‒Ni/MgAl₂O₄
• dry reforming of methane

Acknowledgments

This study was supported by the Ministry of Trade, Industry & Energy (MOTIE) and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) of the Republic of Korea (No.20203030030080).

Disclosure statement

No potential conflict of interest was reported by the author(s).

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Additional information

Funding

This work was supported by the Ministry of Trade, Industry & Energy(MOTIE) and the Korea Institute of Energy Technology Evaluation and Planning(KETEP) of the Republic of Korea (No.20203030030080).