应变特异性参数对微藻水热液化的影响。
Influence of strain-specific parameters on hydrothermal liquefaction of microalgae.
机构信息
Department of Biosystems Engineering, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
出版信息
Bioresour Technol. 2013 Oct;146:463-471. doi: 10.1016/j.biortech.2013.07.123. Epub 2013 Jul 31.
Algae are an interesting feedstock for producing biofuel via hydrothermal liquefaction (HTL), due to their high water content. In this study, algae slurries (5-7 wt% daf) from different species were liquefied at 250 and 375 °C in batch autoclaves during 5 min. The aim was to analyze the influence of strain-specific parameters (cell structure, biochemical composition and growth environment) on the HTL process. Results show big variations in the biocrude oil yield within species at 250 °C (from 17.6 to 44.8 wt%). At 375 °C, these differences become less significant (from 45.6 to 58.1 wt%). An appropriate characterization of feedstock appeared to be critical to interpret the results. If a high conversion of microalgae-to-biocrude is pursued, near critical conditions are required, with Scenedesmus almeriensis (freshwater) and Nannochloropsis gaditana (marine) leading to the biocrude oils with lower nitrogen content from each growth environment.
藻类是一种很有趣的原料，可以通过水热液化（HTL）来生产生物燃料，因为它们的含水量很高。在这项研究中，不同种类的藻类泥浆（5-7wt%干重）在 250 和 375°C 的间歇式高压釜中进行了 5 分钟的液化。目的是分析菌株特异性参数（细胞结构、生化组成和生长环境）对 HTL 过程的影响。结果表明，在 250°C 时，不同物种的生物粗油产率存在很大差异（从 17.6 到 44.8wt%）。在 375°C 时，这些差异变得不那么显著（从 45.6 到 58.1wt%）。对原料进行适当的表征似乎对于解释结果至关重要。如果追求微藻到生物粗油的高转化率，则需要接近临界条件，来自每种生长环境的 Scenedesmus almeriensis（淡水）和 Nannochloropsis gaditana（海洋）导致生物粗油的含氮量较低。
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