Hydrothermal upgrading of algae paste in a continuous flow reactor.
Hydrothermal upgrading of algae paste in a continuous flow reactor.
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DOI：
10.1016/j.biortech.2015.04.012
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发表时间：
2015-09
影响因子：
11.4
通讯作者：
Bhavish Patel;K. Hellgardt
中科院分区：
文献类型：
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作者：
Bhavish Patel;K. Hellgardt
本研究展示了一种新型的实验室规模的连续活塞流反应器的实用性，用于在石英衬里的室中快速水热液化（HTL）微藻。反应在300 - 380 °C下进行，停留时间为0.5-4分钟。环己烷被用作助溶剂，以加强萃取和防止焦炭的形成。最高生物原油产率38 wt.%在380 °C和30 s下实现，以及含有高达60 wt.%物质回收。对生物原油的分析表明，HTL后的脱氧和脱氮程度不同，并且取决于反应条件。傅立叶变换红外光谱分析表明，生物原油含有相似的功能部分，在不同的反应条件下观察到的差异很小。相反，模拟蒸馏和尺寸排阻色谱数据显示，更苛刻的条件分别产生具有改善的沸点分布和较低分子量化合物的稍微更好的生物原油，这使用气相色谱-质谱法证实。
This investigation demonstrates the utility of a novel laboratory scale continuous plug flow reactor for fast Hydrothermal Liquefaction (HTL) of microalgae in a quartz lined chamber. Reactions were carried out between 300 and 380 °C and residence times of 0.5–4 min. Cyclohexane was used as a co-solvent to enhance extraction and prevent char formation. Highest biocrude yield of 38 wt.% was achieved at 380 °C and 30 s as well as Water Soluble Fraction containing up to 60 wt.% matter recovered. Analysis of the biocrude showed that the extent of deoxygenation and denitrogenation after HTL varied and is dependent on the reaction conditions, Fourier Transform Infrared Spectroscopy analysis showed that biocrude contains similar functional moieties with only a small difference observed at different reaction conditions. Conversely, the Simulated Distillation and Size Exclusion Chromatography data showed that harsher conditions produced marginally better biocrude with improved boiling point profile and lower molecular weight compounds, respectively which was confirmed using Gas Chromatography–Mass Spectrometry.