通过藻类主要成分（粗多糖、粗蛋白及其二元混合物）的水热液化来理解低脂质藻类的水热液化特性及途径。
Understanding low-lipid algae hydrothermal liquefaction characteristics and pathways through hydrothermal liquefaction of algal major components: crude polysaccharides, crude proteins and their binary mixtures.
作者信息
Yang Wenchao, Li Xianguo, Li Zihui, Tong Chenhong, Feng Lijuan
机构信息
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
College of Chemistry, Jilin University, Changchun 130012, China.
出版信息
Bioresour Technol. 2015 Nov;196:99-108. doi: 10.1016/j.biortech.2015.07.020. Epub 2015 Jul 10.
Crude polysaccharides and proteins extracted from algae were chosen as model materials to investigate the hydrothermal liquefaction (HTL) characteristics and pathways of low-lipid algae. Liquefaction behavior of the two individuals and their binary mixtures with different mass ratios were evaluated under different temperatures. Formation pathways of bio-oil from crude polysaccharides/proteins were proposed. Results showed that polysaccharides had a small contribution to bio-oil (<5%) and approximately 60% distributed in aqueous phase, while proteins played a crucial role on bio-oil formation (maximum 16.29%). Bio-oil from polysaccharides mainly contained cyclic ketones and phenols and from proteins composed of pyrazines, pyrroles and amines. Interaction between polysaccharides and proteins forming polycyclic nitrogenous compounds had a negative effect on bio-oil yield at 220 and 260°C. However, their further decomposition caused increase of bio-oil yield at 300°C. Mixture liquefaction obtained the highest higher heating value (HHV) of bio-oil and energy recovery than polysaccharides/proteins liquefaction at 300°C.
选取从藻类中提取的粗多糖和蛋白质作为模型材料，研究低脂质藻类的水热液化（HTL）特性及途径。在不同温度下评估了这两种物质及其不同质量比二元混合物的液化行为。提出了由粗多糖/蛋白质生成生物油的途径。结果表明，多糖对生物油的贡献较小（<5%），约60%分布在水相中，而蛋白质对生物油的形成起关键作用（最高可达16.29%）。多糖生成的生物油主要含有环酮和酚类，蛋白质生成的生物油由吡嗪、吡咯和胺类组成。在220℃和260℃时，多糖与蛋白质相互作用形成多环含氮化合物对生物油产率有负面影响。然而，在300℃时它们的进一步分解导致生物油产率增加。在300℃下，混合物液化得到的生物油高热值（HHV）和能量回收率最高，高于多糖/蛋白质液化。
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