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CO2 reforming of methane to syngas over highly active and stable nickel catalyst supported on mesoporous nanocrystalline zirconia

[ Rezaei ] - Chemical Engineering Department, Iran University of Science and Technology, P.O.Box:16315-67, Tehran, Iran State Key Laboratory for Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, China University of Petroleum, Dongying 257061, China
[ Alavi ] - Chemical Engineering Department, Iran University of Science and Technology
[ Zi-Feng Yan ] - State Key Laboratory for Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, China University of Petroleum, Dongying 257061, China

خلاصه مقاله:

Nanocrystalline zirconia with high surface area, mesoporous structure and pure tetragonal crystallite phase has been prepared by the surfactant-assisted route and employed as support for nickel catalysts in dry reforming. The synthesized samples were characterized by XRD, BET, H2 chemisorption and SEM techniques. The prepared zirconia showed a surface area of 174 m2 g-1 after calcination at 700ºC for 4 h. The XRD results showed that the tetragonal phase and mesoporous structure were stable towards higher temperatures. It was shown that the 4%Ni/ZrO2 catalyst exhibited stable activity for syngas production with a decrease about 4% in methane conversion after 50 h of reaction. Addition of cerium oxide to the nickel catalyst improved its stability and decreased the coke deposition.

Zirconia, Nanocrystal, Ni catalysts; Dry reforming.