Characterization and Activity of K, CeO2, and Mn Promoted Ni/Al2O3 Catalysts for Carbon Dioxide Reforming of Methane

Autor:	Kamal K. Pant, Nandini A. Pechimuthu, Subhash C. Dhingra, Rohit Bhalla
Rok vydání:	2006
Předmět:	inorganic chemicals Carbon dioxide reforming General Chemical Engineering Inorganic chemistry chemistry.chemical_element General Chemistry Industrial and Manufacturing Engineering Methane Catalysis Nickel chemistry.chemical_compound chemistry Chemisorption Carbon dioxide BET theory Syngas
Zdroj:	Industrial & Engineering Chemistry Research. 45:7435-7443
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie060661q
Popis:	Reforming of methane with carbon dioxide into syngas over Ni/γ-Al2O3 catalysts modified by potassium, MnO, and CeO2 was studied. The catalysts were prepared by impregnation technique and were characterized by BET surface area, pore volume, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, temperature-programmed studies, and pulse chemisorption. The performance of these catalysts was evaluated by conducting the reforming reaction in a fixed-bed reactor. Results of the investigation suggested that stable Ni/Al2O3 catalysts for the carbon dioxide reforming of methane can be prepared by the addition of both potassium and CeO2 (or MnO) as promoters. The results of the various characterization techniques were used to relate the observed catalytic activity and stability to the catalyst property. The stability and lower amounts of coking on promoted catalysts were attributed to partial coverage of the surface of nickel by patches of promoters, strong metal−support interaction (TPR...
Databáze:	OpenAIRE
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