Climate change is an important issue facing the world today and carbon reduction has become the focus of attention for all countries. Alternative bio-fuels are an important means to achieve carbon emission reduction. The production of jet fuel precursors from biomass by hydrothermal liquefaction (HTL) has received a lot of attention due to its mild conditions and environmental friendliness. Lignocellulosic biomass and algal biomass are considered as the second and the third generation biomasses as promising raw materials for alternative fuel preparation. Among them, lignocellulosic biomass has been extensively studied due to its wide range of sources and can be divided into one-step HTL and stepwise HTL according to the process method. Algal biomass has been extensively studied experimentally due to its short growth cycle and the fact that it can sequester large amounts of carbon without taking up arable land. In this paper, the feedstock composition of different biomasses is reviewed for the HTL of biomass. A detailed review of the process characteristics, reaction pathways and influencing factors for the HTL production of jet fuel precursors from lignocellulosic biomass and algal biomass is also presented. Theoretical references are provided for further process optimization and bio-crude quality upgrading.

中文翻译：

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用于喷气燃料前体的生物质水热液化：综述

气候变化是当今世界面临的重要问题，碳减排已成为各国关注的焦点。替代生物燃料是实现碳减排的重要手段。利用生物质水热液化（HTL）生产航空燃油前体由于其条件温和、环境友好而受到广泛关注。木质纤维素生物质和藻类生物质被认为是第二代和第三代生物质，是有前途的替代燃料制备原料。其中，木质纤维素生物质因其来源广泛而受到广泛研究，根据加工方法可分为一步式HTL和逐步式HTL。藻类生物质由于其生长周期短并且可以在不占用耕地的情况下封存大量碳，因此已被广泛地进行了实验研究。本文针对生物质的HTL，对不同生物质的原料组成进行了综述。还详细回顾了利用木质纤维素生物质和藻类生物质 HTL 生产喷气燃料前体的工艺特征、反应途径和影响因素。为进一步工艺优化和生物原油质量升级提供理论参考。