生物质与废轮胎共热解催化热解油蒸发过程及其动力学研究

Thermal behaviors of commercial diesel oil 0# and pyrolysis oil obtained from co-pyrolysis of biomass and waste tyre blend (with or without catalysts) were investigated by thermogravimetric analysis (TG-DTG). Through linear regression, the results illustrated that for pyrolysis oils the thermal kinetic follows the formula dα/dt=Ae-△vapH/RT(1-α)2 and for diesel oil it follows the formula dα/dt=1.5Ae-△vapH/RT(1-α)2/3\1-(1-α)1/3\-1. The evaporation heats calculated were 37.46kJ·mol-1 for SBAcatalyzed pyrolysis oil, 30.60kJ·mol-1 for MCM-41-catalyzed pyrolysis oil, 41.27kJ·mol-1 for pyrolysis oil without using any catalyst, and 55.50kJ·mol-1 for diesel oil 0#; these values were close to those reported in the literature. The existence of SBA-15 and MCM-41 as catalysts in the pyrolysis can reduce high fractions of the resultant pyrolysis oil; SBA-15 performed better than MCM-41 in reducing high fractions.