Effect of Sr Incorporation and Ni Exsolution on Coke Resistance of the Ni/Sr–Al2O3 Catalyst for Dry Reforming of MethaneClick to copy article linkArticle link copied!
- Jeongmin KimJeongmin KimGraduate School of Energy Science and Technology, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of KoreaMore by Jeongmin Kim
- Jeong-Cheol SeoJeong-Cheol SeoHydrogen & C1 Gas Research Center, Korea Research Institute of Chemical Technology, 141, Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of KoreaMore by Jeong-Cheol Seo
- Won-Jun Jang*Won-Jun Jang*Email: [email protected]. Phone: +82-42-821-8610. Fax: +82-42-821-8839.Department of Environmental and Safety Engineering, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16499, Republic of KoreaMore by Won-Jun Jang
- Kyubock Lee*Kyubock Lee*Email: [email protected]. Phone: +82-31-219-3226. Fax: +82-504-412-4612.Graduate School of Energy Science and Technology, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of KoreaMore by Kyubock Lee
Abstract

The effects of Sr incorporation over Ni/Al2O3 catalysts were explored for the dry reforming of methane (DRM). Ni-exsolved catalysts (NiEXS) and conventional Ni-impregnated catalysts (NiIMP) were prepared by using a spray-pyrolysis-assisted evaporation-induced self-assembly (EISA) method to produce a solid solution and mesoporous structures. In the DRM tests, strontium showed crucial effects for improving the resistance of carbon formation and the stability of the catalyst. Particularly, NiEXS/Sr–Al demonstrated a crystal size growth of 0.8% and a coking rate of 0.012 gc·gcat–1·h–1, which was remarkably lower than those of the other catalysts (NiIMP/Al, NiIMP/Sr–Al, and NiEXS/Al). This study primarily investigated the catalytic properties and strong metal–support interaction, which depended on the preparation procedure, for verifying the origin of the most stable NiEXS/Sr–Al catalyst. In particular, the roles of promotional Sr in enhancing the CO2 adsorption/desorption ability of the catalyst at different temperatures as well as the amount of oxygen species were elucidated in detail.
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