Algal biorefinery to value-added products by using combined processes based on thermochemical conversion: A review
Algal biorefinery to value-added products by using combined processes based on thermochemical conversion: A review
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通过使用基于热化学转化的组合工艺将藻类生物精炼成增值产品：综述
DOI：
10.1016/j.algal.2020.101819
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发表时间：
2020-05
期刊：
影响因子：
--
通讯作者：
Zhou Wenguang
中科院分区：
文献类型：
--
作者：
Fan Liangliang;Zhang Haili;Li Jingjing;Wang Yunpu;Leng Lijian;Li Jun;Yao Yanhong;Lu Qian;Yuan Wenqiao;Zhou Wenguang
热化学过程，包括气化、液化和热解，是很有前途的藻类转化技术。气化是将藻类生物质转化为燃料气体的有效途径，而液化和热解则分别有利于生产低分子量生物油和高能量密度生物原油。为了了解藻类成分（蛋白质、脂质和碳水化合物）在热化学转化过程中的作用，本文从藻类成分及其模式化合物的热化学转化方面综述了生物燃料的特性。藻类成分的特征指纹各不相同。因此，总藻类生物量的热化学转化导致生物燃料的异质性。氮化合物的不利生产也导致了资源和能量的损失，这是藻类生物炼制的关键瓶颈。因此，本文将讨论一些组合过程。藻类生物质的水热液化和水热气化的结合显示了改善燃料气体生产的应用潜力。脂质提取结合热化学渣油转化有助于提高总油收率。蛋白质提取结合热化学残留物转化降低了生物油中含氮化合物污染的风险，提高了增值蛋白质衍生产品的回收率。应进一步探索热化学转化前的蛋白质和脂质提取，以最大限度地利用藻类生物质的多种增值产品。
Thermochemical processes, including gasification, liquefaction, and pyrolysis, are promising technologies for algal conversion. Gasification is effective to convert algal biomass into fuel gases while liquefaction and pyrolysis are favorable for the production of bio-oil with low molecular weight and biocrude with high energy density, respectively. To understand the role of algal components (proteins, lipids, and carbohydrates) on thermochemical conversion processes, this paper reviews the properties of biofuels from the thermochemical conversion of algal components and their model compounds. The characteristic fingerprints of algal components differ from one another. Consequently, the thermochemical conversion of the total algal biomass results in heterogeneity of the biofuels. The unfavorable nitrogenous compound production also leads to resource and energy losses, which are the critical bottleneck of algal biorefinery. As such, this review tackles some combined processes. The combination of the hydrothermal liquefaction of algal biomass and the hydrothermal gasification of an aqueous fraction shows potential for applications that improve fuel gas production. Lipid extraction combined with thermochemical residue conversion contributes to an increase in total oil yield. Protein extraction combined with thermochemical residue conversion decreases the risk of nitrogenous compound contamination in bio-oil and increases the recovery of value-added protein-derived products. Protein and lipid extraction before thermochemical conversion should be further explored to maximize the exploitation of multiple value-added products from algal biomass.
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15.1
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