A lab-scale adiabatic reactor has been self-made to characterize the coupled properties of heat and reactions during the co-thermal-processing of coal and biomass with steam or steam/O_(2) gasification agents.Results ...A lab-scale adiabatic reactor has been self-made to characterize the coupled properties of heat and reactions during the co-thermal-processing of coal and biomass with steam or steam/O_(2) gasification agents.Results showed that the synergistic effects caused by heat transfer between corncob and coal at different mixing ratios were heavily determined by coal rank and gasification agent.During steam co-processing,the heat transfer from corncob char to adjacent bituminous coal char promoted the water-gas reaction on coal char and contributed to synergistic effects;the heat transfer from anthracite char to adjacent corncob char reduced the kinetic rate of the water-gas reaction on coal char and contributed to inhibitory effects,and the inhibitory effect caused by heat transfer was greater than the promotion effects of biomass mass transfer.The introduction of O_(2) diminished the impact of inter-particle heat transfer and altered the intensity of synergy,decreasing the values of synergy factor of bituminous coal/corncob blends by 17%and increasing the value of synergy factor of anthracite/corncob blends by 142.5%.This study provides sufficient support for the process conditions selection for the production of syngas with specific H_(2)/CO molar ratios and the desired level of gasification performance.展开更多
基金supported by the National Key Research and Development Program of China(2022YFE0208400)the Shanxi Province Key Research and Development Program Project(202202090301002).
文摘A lab-scale adiabatic reactor has been self-made to characterize the coupled properties of heat and reactions during the co-thermal-processing of coal and biomass with steam or steam/O_(2) gasification agents.Results showed that the synergistic effects caused by heat transfer between corncob and coal at different mixing ratios were heavily determined by coal rank and gasification agent.During steam co-processing,the heat transfer from corncob char to adjacent bituminous coal char promoted the water-gas reaction on coal char and contributed to synergistic effects;the heat transfer from anthracite char to adjacent corncob char reduced the kinetic rate of the water-gas reaction on coal char and contributed to inhibitory effects,and the inhibitory effect caused by heat transfer was greater than the promotion effects of biomass mass transfer.The introduction of O_(2) diminished the impact of inter-particle heat transfer and altered the intensity of synergy,decreasing the values of synergy factor of bituminous coal/corncob blends by 17%and increasing the value of synergy factor of anthracite/corncob blends by 142.5%.This study provides sufficient support for the process conditions selection for the production of syngas with specific H_(2)/CO molar ratios and the desired level of gasification performance.
