基于Aspen Plus模拟的生物质气化制甲醇系统评估OA北大核心

;To optimize the biomass gasification to methanol system and identify the optimal operating conditions,Aspen Plus was utilized to simulate,calculate,and evaluate the biomass gasification,shift reaction,calcium oxide decarbonization,and methanol synthesis processes.The system employed rice husk as the feedstock and pure oxygen along with steam as the gasifying agents.The study investigated the effects of gasification reaction temperature,oxygen-to-biomass ratio(ER),and steam-to-biomass ratio on the composition and flow rate of the exit gases from each reactor,the cold gas efficiency of the gasifier,the hydrogen-to-carbon ratio of the syngas,and the production rates of methanol and steam.The results indicated that the optimal operating conditions for the system were an ER of 0.275,a gasifier temperature of 850 ℃,and a steam-to-biomass ratio of 0.1.Under these conditions,consuming 100 kg/h of rice husk yielded 42.63 kg/h of methanol and 151.82 kg/h of steam,with a cold gas efficiency of 77.78％and a syngas hydrogen-to-carbon ratio of 1.89.When the steam-to-biomass ratio was adjusted to 0.3,the purity of H2 in the gas after decarbonization and condensation reached 82.47％.Therefore,by adjusting the steam-to-biomass ratio,it is possible to achieve a multi-production mode for green methanol and green hydrogen from biomass.