Two microalgae species (marine Nannochloropsis gaditana, and freshwater Scenedesmus almeriensis) were subjected to pyrolysis followed by a catalytic hydrotreatment of the liquid products with the objective to obtain liquid products enriched in hydrocarbons. Pre-dried microalgae were pyrolyzed in a mechanically stirred fluidized bed reactor (380 and 480 degrees C) with fractional condensation. The heavy phase pyrolysis oils were hydrotreated (350 degrees C and 15 MPa of H-2 pressure for 4 h) using a NiMo on alumina catalyst. The pyrolysis liquids after pyrolysis and those after catalytic hydrotreatment were analyzed in detail using GC-MS, GC x GC-MS, and 2D HSQC NMR. The liquid products are enriched in aromatics and aliphatic hydrocarbons and, as such have a considerably lower oxygen content (1.6-4.2% w/w) compared to the microalgae feeds (25-30% w/w). The overall carbon yield for the liquid products was between 15.6 and 19.1% w/w based on the initial carbon content of the algae feedstock.

中文翻译：

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微藻（Nannochloropsis gaditana 和 Scenedesmus almeriensis）碳氢化合物的两步快速热解-催化加氢处理工艺的实验研究

两种微藻物种（海洋 Nannochloropsis gaditana 和淡水 Scenedesmus almeriensis）经过热解，然后对液体产品进行催化加氢处理，目的是获得富含碳氢化合物的液体产品。预干燥的微藻在机械搅拌流化床反应器（380 和 480 摄氏度）中进行热解，并进行分级冷凝。使用氧化铝上的 NiMo 催化剂对重相热解油进行加氢处理（350 摄氏度和 15 MPa 的 H-2 压力，持续 4 小时）。使用 GC-MS、GC x GC-MS 和 2D HSQC NMR 详细分析了热解后的热解液和催化加氢处理后的热解液。液体产品富含芳烃和脂肪烃，因此具有相当低的氧含量 (1.6-4. 2% w/w) 与微藻饲料 (25-30% w/w) 相比。基于藻类原料的初始碳含量，液体产品的总碳产率在 15.6 至 19.1% w/w 之间。