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|Title:||Catalytic combustion of methane on Ce1-xMxO2- (M=Si, Mg, Al) oxides|
|Keywords:||Catalysts;Catalytic combustion;Methane combustion;Ceria;Doped catalyst;Solid solutions|
|Abstract:||A series of mixed oxides of cerium, viz., Ce1-xMxO2-& (M=Si, Mg, Al) has been prepared by sol-gel method. X-ray diffraction technique, BET surface area measurements, scanning electron microscopy images and Raman spectroscopy ascertain their structures, while hydrogen temperature-programmed reduction determine the redox properties. Catalytic methane combustion tests with catalytic amounts of this series of compounds show that the activity of CeO2 is highly improved when Ce is substituted with Si or Mg. Among the studied catalysts, Ce0.95Si0.05O2 has the highest catalytic activity with T90 at 600 oC. Doping of Si or Mg into CeO2 results in higher catalytic activity than pure CeO2 due to higher surface area, smaller particle size, increased amount of oxygen vacancies and enhanced reducibility.|
|Appears in Collections:||IJC-A Vol.53A(02) [February 2014]|
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