School of Mechanical Engineering,Beijing Institute of Technology

气化过程是煤基制氢系统的核心过程之一,通过立式管式炉研究了煤与生物质的共热解行为,并提出了一种基于煤与生物质互补气化技术的新型制氢系统。煤与生物质共热解的协同作用促进了热解气生成,提高了气化效率。燃烧能量品位较低的生物质为气化反应供热,提高了气化和燃烧反应间的品位匹配程度。此外,互补气化技术使用碳中性生物质燃料能够大幅降低碳排放。使用AspenPlus软件对新型和参考系统进行仿真,从热力学、碳排放和经济可行性3个方面评估新型和参考系统的性能。结果表明:生物质掺混比为0.25时,热解过程协同作用最显著,新型系统能量和㶲效率分别为76.82%和64.56%,均高于参考系统。新型系统的碳排放量为1.12t/h,相对传统水煤浆制氢系统能够大幅降低碳排放。新型系统在全生命周期内的动态回收周期、净现值和制氢成本分别为3.41a、269535.58k$和1.37$/kg,具有良好经济效益和应用前景。

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 oncomplementary gasification technology of coal and biomass was proposed. The synergistic effect of coal and biomass co-pyrolysispromotes pyrolysis gas generation and improves the gasification efficiency. Biomass with lower combustion energy grade supplies heat forthe gasification reaction, which improves the grade matching between gasification and combustion reactions. In addition, the use ofcarbon-neutral biomass fuels for complementary gasification technologies can significantly reduce carbon emissions. In this research,thenovel and reference systems were simulated using Aspen Plus software to evaluate the performance of the novel and reference systems interms of thermodynamics,carbon emission and economic feasibility. The results showed that the synergistic effect of the pyrolysis processwas most significant at a biomass blending ratio of 0.25,and the energy and yield efficiencies of the novel system were higher than that ofthe reference system at 76.82% and 64.56%,respectively. The carbon emission of the novel system is 1.12 t/h,which can significantlyreduce the carbon emission relative to the conventional coal-water slurry hydrogen generation system. The DPP, NPV and cost ofhydrogen production of the novel system during the whole life cycle are 3.41 years,269535.58 k$ and 1.37 $/kg,respectively,which havegood economic benefits and application prospects.

国家自然科学基金资助项目(52122601);中山市科技计划资助项目(2020AG019)

张钟,李胜.基于煤与生物质互补气化技术的新型制氢系统的技术经济与环境评估[J].洁净煤技术,2024,30(12):105−117.

ZHANG Zhong,LI Sheng. Techno-economic and environmental assessment of a novel hydrogen production system based on complementary coal and biomass gasification technology[J].Clean Coal Technology,2024,30(12):105−117.