Characterization of Water Vapor-assisted Co-pyrolysis of Coal and Biomass in a Rotary Furnace to Produce High Calorific Value Combustible Gas
Co-pyrolysis of coal and biomass,as an important technological pathway to realize the effi-cient and clean utilization of these two carbon-containing resources,is of great significance to achieve the goal of carbon neutrality.This study aims to explore the effects of different conditions on the co-py-rolysis of coal and biomass to produce high calorific components of the gas(H2,CH4,CO)under the as-sistance of water vapor.The effects of temperature and mixing ratio on the gas production and calorific value of H2,CH4,and CO during the co-pyrolysis of lignite and corn stover and water vapor-assisted co-pyrolysis were investigated by means of a large-scale rotary furnace,and verified by an Aspen Plus model.The experimental and simulation results showed that there was an obvious synergistic effect be-tween straw and lignite,and 80％of straw blending ratio and 600 ℃ temperature were the optimal condi-tions for gas production without water vapor,and the calorific value of the gas was more than 3 000 J/L.The co-pyrolysis temperature needed to be raised appropriately under the conditions of water vapor par-ticipation,and the water vapor promoted the generation of high calorific components of the gas,such as H2,CH4,and CO,and the blending ratio of 80％of straw and the 800 ℃ co-pyrolysis temperature were the optimal conditions for the production of gas,and the temperature of the gas was the optimal con-dition.The 80％straw blending ratio and 800 ℃ co-pyrolysis temperature were the best conditions for gas production,and the calorific value of the gas was doubled to 5 639 J/L.The results showed that the gas was produced under the condition of water vapor participation.
coalbiomassrotary furnaceco-pyrolysis/gasificationaspen pluscombustible gas
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