Techno-economic and environmental assessment of a novel hydrogen production system based on complementary coal and biomass gasification technology
Gasification technology is one of the core processes in coal-based hydrogen production systems,and in this research,the co-pyrolysis behavior of coal and biomass was investigated through a vertical tube furnace,and a novel hydrogen production system based on complementary gasification technology of coal and biomass was proposed.The synergistic effect of coal and biomass co-pyrolysis promotes pyrolysis gas generation and improves the gasification efficiency.Biomass with lower combustion energy grade supplies heat for the gasification reaction,which improves the grade matching between gasification and combustion reactions.In addition,the use of carbon-neutral biomass fuels for complementary gasification technologies can significantly reduce carbon emissions.In this research,the novel and reference systems were simulated using Aspen Plus software to evaluate the performance of the novel and reference systems in terms of thermodynamics,carbon emission and economic feasibility.The results showed that the synergistic effect of the pyrolysis process was most significant at a biomass blending ratio of 0.25,and the energy and yield efficiencies of the novel system were higher than that of the reference system at 76.82％and 64.56％,respectively.The carbon emission of the novel system is 1.12 t/h,which can significantly reduce the carbon emission relative to the conventional coal-water slurry hydrogen generation system.The DPP,NPV and cost of hydrogen production of the novel system during the whole life cycle are 3.41 years,269 535.58×103 $ and 1.37 $/kg,respectively,which have good economic benefits and application prospects.
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维普
