Abstract Hydrothermal liquefaction of biomass in near-/supercritical water has attracted great attention in recent years. Although this technology seems to be promising for transformation of microalgal biomass, the information on the impact of feedstock and processing variables of continuous hydrothermal liquefaction on the properties of bio-oil provided in previous literature is scarce. Herein, the low-lipid Scenedesmus sp. biomass has been transformed to bio-oils through continuous hydrothermal liquefaction under various process conditions. The influence of temperature and residence time on bio-oil characteristic was discussed based on characterization by FT-IR, GC–MS and gel permeation chromatography. The relative degree of branching of carbon chain of bio-oils components was estimated based on the deconvolution of methyl and methylene FT-IR absorption bands. The presumptive pathways of the reactions have been postulated. Finally, it was found that the parameters of bio-oil may be tailored by adjustment of processing variables, however, possible subsequent/parallel effects must be considered while designing the process.

中文翻译：

---

工艺条件对通过栅藻的连续水热液化获得的生物油的影响。微藻

摘要 近年来，近/超临界水中生物质的水热液化引起了广泛关注。尽管这项技术似乎有望转化微藻生物质，但关于连续水热液化的原料和加工变量对之前文献中生物油特性影响的信息很少。在此，低脂栅藻属。生物质已通过在各种工艺条件下的连续水热液化转化为生物油。基于FT-IR、GC-MS和凝胶渗透色谱表征，讨论了温度和停留时间对生物油特性的影响。基于甲基和亚甲基 FT-IR 吸收带的解卷积估计生物油组分碳链的相对支化度。已经假定了反应的假定途径。最后，发现生物油的参数可以通过调整工艺变量来定制，然而，在设计工艺时必须考虑可能的后续/平行效应。