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Catalytic Carbon Oxidation in The Presence of Cerium Oxide: Experimental Study and Modeling of The Effect of Oxygen Concentration
Author(s) -
Issa M.,
Mahzoul H.,
Brillard A.,
Brilhac J.F.
Publication year - 2009
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200800509
Subject(s) - catalysis , carbon black , oxygen , soot , carbon fibers , redox , cerium oxide , inorganic chemistry , isothermal process , oxide , combustion , activation energy , chemistry , cerium , catalytic oxidation , carbon monoxide , catalytic combustion , chemical engineering , materials science , thermodynamics , organic chemistry , natural rubber , physics , composite number , engineering , composite material
The catalytic combustion of carbon black (CB) used as a model of diesel soot in tight contact with a commercial ceria (CeO 2 ) was investigated. Oxygen mole fractions of 10, 5, and 1 % in the gas phase were tested in order to gain a better understanding of the redox properties of ceria and the mechanism of the catalytic oxidation of carbon black. Both isothermal and temperature programmed runs are performed to extract kinetic parameters, such as activation energy and reaction order with respect to oxygen partial pressure. The experimental data are used to propose a model of CB oxidation in the presence of CeO 2 allowing the simulation of carbon oxidation.