The catalytic combustion of the emission from coke ovens containing various volatile organic compounds (VOCs) and inorganic species over a La0.9Ce0.1CoO3 catalyst is investigated in an integral fixed reactor through several steps. (1) Combustion of a mixture of VOC reveals that the kinetics of total oxidation of methane determines the total VOC conversion. (2) The conversion of methane, in the case of sulfur-free feed is inhibited by H2O and CO2.