Tar decomposition over a dolomite catalyst in gasification conditions was modeled using benzene as a tar model compound. The reactions of the gas main components were included in the models studied. Kinetic studies were carried out at 750−925 °C and under ambient pressure in a plug flow reactor using a mixture of simulated gasification gas. Operation conditions without external or internal mass-transfer limitations were applied. Mechanistic models of the Langmuir−Hinshelwood type describing benzene decomposition were developed and tested. Experimental results could be best described by a kinetic rate equation based on the assumption that single-site adsorption of benzene was the rate-determining step and that adsorption of hydrogen inhibited benzene decomposition.
Simell, P., Hirvensalo, E., Smolander, V., & Krause, A. (1999). Steam reforming of gasification gas tar over dolomite with benzene as a model compound. Industrial & Engineering Chemistry Research, 38(4), 1250-1257. https://doi.org/10.1021/ie980646o