Thermochemical liquefaction (TCL) of microalgae Haematococcus pluvialis over diverse metal-supported montmorillonite catalysts at lower temperature was studied. This study aimed to investigate the liquefaction conditions for producing high quality biocrude from microalgae with high selectivity. Metal-supported montmorillonite catalysts, which are cheap, efficient and could be prepared conveniently, are firstly reported to produce biocrude from microalgae. Using Fe/montmorillonite as catalyst and methanol as solvent, the liquefaction of Haematococcus pluvialis could obtain a maximal biocrude yield of 68.9% and the highest selectivity of 99.4% at low temperature (200 °C). The methanol-ethanol co-solvents were also applied to liquefaction of microalgae. The co-solvents exhibited a good synergistic effect and helped for liquefaction of microalgae. Meanwhile, Fe/montmorillonite catalyst could promote cracking reactions of non-volatile tarry residue and change the composition of biocrude. Gas chromatography-mass spectrometry (GC-MS) analysis demonstrated that major compounds in biocrude were esters, and the contents of fatty acids and N-containing compounds in biocrude were decreased significantly by adding Fe/montmorillonite.

研究了在低温下，多种金属负载的蒙脱石催化剂对微藻类血球菌的热化学液化（TCL）。这项研究旨在调查液化条件，以高选择性从微藻生产高质量的生物原油。廉价，高效且可方便地制备的金属负载蒙脱土催化剂首先被报道可从微藻类生产生物原油。以铁/蒙脱土为催化剂，甲醇为溶剂，雨生红球菌液化在低温（200°C）下可获得最高68.9％的生物粗品收率和99.4％的最高选择性。甲醇-乙醇助溶剂也用于微藻的液化。助溶剂表现出良好的协同作用，有助于微藻液化。同时，Fe /蒙脱土催化剂可促进非挥发性焦油渣的裂解反应，并改变生物原油的组成。气相色谱-质谱（GC-MS）分析表明，在生物质原油主要化合物是酯，以及脂肪酸和内容Ñ含在生物质原油化合物通过添加Fe /蒙脱土显著下降。