Effects of CO2 content on the activity and stability of nickel catalyst supported on mesoporous nanocrystalline zirconia |
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| Authors: | M Rezaei S M Alavi S Sahebdelfar Zi-Feng Yan |
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| Institution: | 1. Chemical Engineering Department, Faculty of Engineering, University of Kashan, Iran; 2. Chemical Engineering Department, Iran University of Science and Technology, Tehran, Iran; 3. Petrochemical Research & Technology Company (NPC-RT), Tehran, Iran; 4. State Key Laboratory for Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, China University of Petroleum, Dongying 257061, Shandong, China |
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| Abstract: | The effects of carbon dioxide content on the catalytic performance and coke formation of nickel catalyst supported on mesoporous nanocrystalline zirconia with high surface area and pure tetragonaI crystalline phase were investigated in methane reforming with carbon dioxide.The samples were characterized bV XRD,BET,PR,TPO,TPH,TEM,and SEM techniques.The catalyst prepared showed high surface area and a mesoporous structure with a narrow pore size distribution.The obtained results revealed that the increase in CO2 content increased the methane conversion and stability of the catalyst and significantly reduced the coke deposition.The TPH analysis showed that several species of carbon with different reactivities toward hydrogenation were deposited on the spent catalysts employed under different CO2 contents. |
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| Keywords: | Ni catalysts carbon dioxide reforming coke deposition |
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