Catalytic decomposition of biomass tar compound by calcined coal gangue: A kinetic study

摘要

The kinetics of thermal decomposition of biomass tar was studied using phenol as a model compound under isothermal conditions by a two stage micro fluidized bed reactor. Calcined coal gangue and gamma-Al2O3 were employed as catalyst, particularly gangue representing one type of catalyst for tar decomposition that prepared by the thermal conversion of inferior coal. The Friedman method and integral method were employed for the determination of kinetic parameters for forming H-2 and CO by phenol decomposition. The results demonstrated that the activation energy for generating H-2 was lower compared with CO, indicating that the reactions for forming H-2 was easier in phenol decomposition. Higher activation energies for H-2 and CO generating were obtained using gangue as catalyst, implying that the catalytic performance gangue was slightly lower toward phenol decomposition process due to the high content of SiO2 in gangue. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.