Kinetic study on coal–biomass mixed char co-gasification with H2O in the presence of H2

Abstract The coal–biomass mixed char co-gasification with H 2 O in the presence of H 2 was investigated under atmospheric conditions using a tube furnace and gas analyzer. Various partial pressures of H 2 O and H 2 were tested within a temperature range of 825–900 °C. Bituminous coal, pineapple sawdust, and a mixture of these two having a mass ratio of 1:1 were used to prepare chars. Random pore model was utilized to explain the experimental results. The results demonstrated that the inhibition effect of H 2 on char-H 2 O gasification can be described using the Langmuir–Hinshelwood (L–H) equation. The inhibition effect on the mixture sample was more intense than on the pure samples. The L–H equation kinetic parameters were acquired and expressed in an Arrhenius equation form to determine the pre-exponential factor and activation energy.

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