One of the major problems for biomass gasification is the presence of tar in the product gas. We are presently investigating catalytic behavior of olivine as a prospective bed additive for biomass gasifiers for tar removal. The present investigation is a continuation of our work using pretreated olivine as a tar removal catalyst, and the effect of different gas components is described in this paper. H 2 O, CO 2 , and H 2 have a strong influence on naphthalene decomposition reactions. H 2 O and CO 2 have an enhancing effect, and H 2 has an inhibiting effect. Kinetic parameters were determined in the presence of the main gas components from a gasifier using a simple power law kinetic model, and an activation energy of 213 kJ mol -1 was found over pretreated olivine as the catalyst. An attempt is made to postulate the reaction network for naphthalene decomposition in the presence of a reactive gas mixture.
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