Energy and Resources Research Institute, School of Process, Environmental and Materials Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
Bioresour Technol. 2011 Apr;102(7):4841-8. doi: 10.1016/j.biortech.2010.12.113. Epub 2011 Jan 5.
Hydrothermal processing of high lipid feedstock such as microalgae is an alternative method of oil extraction which has obvious benefits for high moisture containing biomass. A range of microalgae and lipids extracted from terrestrial oil seed have been processed at 350 °C, at pressures of 150-200 bar in water. Hydrothermal liquefaction is shown to convert the triglycerides to fatty acids and alkanes in the presence of certain heterogeneous catalysts. This investigation has compared the composition of lipids and free fatty acids from solvent extraction to those from hydrothermal processing. The initial decomposition products include free fatty acids and glycerol, and the potential for de-oxygenation using heterogeneous catalysts has been investigated. The results indicate that the bio-crude yields from the liquefaction of microalgae were increased slightly with the use of heterogeneous catalysts but the higher heating value (HHV) and the level of de-oxygenation increased, by up to 10%.
热水解处理高脂肪原料（如微藻）是一种提取油脂的替代方法，对高含水量的生物质具有明显的优势。一系列微藻和陆地油籽提取的脂质在 350°C、150-200 巴的压力下在水中进行了处理。在某些多相催化剂的存在下，热水解液化被证明可以将三酰基甘油转化为脂肪酸和烷烃。本研究比较了溶剂萃取和热水解处理得到的脂质和游离脂肪酸的组成。初始分解产物包括游离脂肪酸和甘油，并且研究了使用多相催化剂脱氧的潜力。结果表明，使用多相催化剂略微提高了微藻液化的生物粗油收率，但高位热值（HHV）和脱氧程度提高了 10%。
