Microalgal biomass processing by continuous hydrothermal liquefaction (HTL) has recently received much interest and can be used to convert microalgal biomass to biocrude oil and drop‐in fuels. This review focuses on the conversion of microalgae biomass to energy production through continuous HTL processes. In addition, processes for upgrading feedstocks and biocrude are also discussed. The feed of the biomass slurry is treated according to size and moisture regulations. Following separation of the gaseous, liquid, and solid phases, the determination of elemental, physical, and chemical fragments, yield of energy, and other properties of the various products is carried out. Homogeneous or heterogeneous catalysts improve the biocrude yield and quality as does higher moisture content. The high percentage of N₂ and O₂ in the feedstock results in lower quality products. This may be resolved through pre‐processing of the biomass, controlling of HTL processes conditions, and post‐upgrading processing of the HTL products. The promising potential of microalgae biomass for biocrude and drop‐in fuels may have an important contribution to the world's renewable energy sources through HTL in the near future.

中文翻译：

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连续水热液化用于从微藻原料生产生物燃料和生物原油

最近，通过连续水热液化（HTL）处理微藻生物质受到了广泛的关注，可用于将微藻生物质转化为生物原油和直接燃料。本文的重点是通过连续的HTL工艺将微藻类生物质转化为能源生产。另外，还讨论了提质原料和生物粗提物的方法。根据尺寸和水分规定处理生物质浆料的进料。在分离气相，液相和固相之后，进行元素，物理和化学碎片，能量产率以及各种产物的其他性质的测定。均相或非均相催化剂与较高的水分含量一样，可以提高生物粗品的产率和质量。高比例的N ₂原料中的O ₂和O ₂导致产品质量降低。这可以通过生物质的预处理，HTL工艺条件的控制以及HTL产品的升级后处理来解决。在不久的将来，微藻生物质用于生物原油和直接燃料的潜力巨大，这可能通过HTL对世界可再生能源做出重要贡献。