生物质加压热解：加压条件优化和热解产物分析。
Gas-pressurized torrefaction of biomass wastes: The optimization of pressurization condition and the pyrolysis of torrefied biomass.
机构信息
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
出版信息
Bioresour Technol. 2021 Jan;319:124216. doi: 10.1016/j.biortech.2020.124216. Epub 2020 Oct 6.
A novel gas-pressurized (GP) torrefaction with high oxygen removal efficiency at mild temperature was proposed in our previous work. However, the optimal condition of the GP torrefaction and subsequent pyrolysis of the torrefied biomass were not clear. In this work, the effect of pressure on the GP torrefaction and pyrolysis product properties of the torrefied biomass were studied in detail. The results show that the pressure increasing from 1.7 MPa to 5.0 MPa just slightly contributed to further oxygen removal, and 1.7 MPa was thus selected as the optimum pressure. The GP torrefaction significantly improved the product property of biomass pyrolysis compared to the conventional torrefaction (AP torrefaction). The acids content in bio-oil was reduced from 15-20% to less than 5%, and the calorific value of biogas increased to as high as 16.57-19.31 MJ/Nm. Furthermore, an overall conversion mechanism of combined GP torrefaction and subsequent pyrolysis of biomass was proposed.
在我们之前的工作中，提出了一种新型的高气固比（GP）温和条件下脱除氧气效率高的热解方法。然而，GP 热解的最佳条件和随后的热解生物质的热解产物特性并不明确。在这项工作中，详细研究了压力对 GP 热解和热解产物特性的影响。结果表明，压力从 1.7 MPa 增加到 5.0 MPa 仅略微有助于进一步脱除氧气，因此选择 1.7 MPa 作为最佳压力。与传统热解（AP 热解）相比，GP 热解显著改善了生物质热解的产物特性。生物油中的酸含量从 15-20%降低到 5%以下，沼气的热值高达 16.57-19.31 MJ/Nm。此外，提出了一种生物质联合 GP 热解和随后热解的整体转化机制。
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