4.6 Article

Techno-economic and Environmental Analysis of Algae Biodiesel Production via Lipid Extraction Using Alternative Solvents

期刊

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 61, 期 49, 页码 18030-18044

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.2c03016

关键词

-

向作者/读者索取更多资源

This study analyzes the techno-economic and environmental impacts of using alternative solvents for lipid extraction in algae biodiesel production and identifies limonene and ETBE as promising substitutes. It highlights the need for further efforts to improve the economic viability and environmental performance of algae biodiesel production.
Lipid extraction and biodiesel production from algae biomass rely on volatile organic solvents obtained from fossil resources such as hexane, whose use involves high energy consumption for recovery and negative environmental impacts due to their volatile and hazardous nature. This study presents a techno-economic and environmental analysis of using alternative lipid extraction solvents in algae biodiesel production in an effort to understand how they may affect the performance of the process. Lipid recovery (LR), minimum biodiesel selling price (MBSP), solvent intensity (SI), energy intensity (EI), and water consumption (WC) are considered here as performance indicators at process and downstream processing levels. The studied solvents are limonene, ethyl tert-butyl ether (ETBE), and cydohexane, which were screened in a previous study by the authors, and hexane for reference. The assessment is carried out using data sourced from the literature (upstream processing), while downstream processing data is generated in this study using the COnductor-like Screening MOdel for Real Solvents (COSMO-RS) method and process simulation tools in the absence of experimental data for the solvents. The results indicate that while there is no single candidate solvent that outperforms hexane in every criteria considered here, ETBE and limonene are promising alternative solvents for lipid extraction and should be explored further. For example, ETBE presented the highest LR (95.5%) and lowest MBSP (8.58 $/US gal), while limonene has a SI that is 35% lower than hexane. In terms of EI and WC, ETBE is the best performing solvent after hexane with a 4% difference. The MBSP of ETBE is still around 33 times the selling price of fossil diesel, and further efforts to improving the economic viability of algae biodiesel production are still needed. Besides from decreasing algae biomass costs (upstream processing), other improvement opportunities worth exploring in downstream processing includes alternative cell disruption technologies, as this is the most energy intensive stage in lipid extraction. While the use of biobased and less hazardous solvents can help improve the environmental performance of downstream processing in algae biodiesel production, it is recommended that their environmental impacts are quantified on a life cycle basis, i.e., solvent production and disposal.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据