Aboelazayem Omar, Gadalla Mamdouh, Alhajri Ibrahim, Saha Basudeb
Department of Chemical and Environmental Engineering, Faculty of Engineering, University Park, University of Nottingham, Nottingham NG7 2RD, UK.
School of Engineering, London South Bank University, 103 Borough Road, London SE1 0AA, UK.
Renew Energy. 2021 Feb;164:433-443. doi: 10.1016/j.renene.2020.09.058. Epub 2020 Sep 18.
Biodiesel production using supercritical methanolysis has received immense interest over the last few years. It has the ability to convert high acid value feedstock into biodiesel using a single-pot reaction. However, the energy intensive process is the main disadvantage of supercritical biodiesel process. Herein, a conceptual design for the integration of supercritical biodiesel process with organic Rankine cycle (ORC) is presented to recover residual hot streams and to generate electric power. This article provides energy and techno-economic comparative study for three developed scenarios as follows: original process with no energy integration (Scenario 1), energy integrated process (Scenario 2) and advanced energy integrated process with ORC (Scenario 3). The developed integrated biodiesel process with ORC resulted in electric power generation that has not only satisfied the process electric requirement but also provided excess power of 257 kW for 8,000 tonnes/annum biodiesel plant. The techno-economic comparative analysis resulted in favouring the third scenario with 36% increase in the process profitability than the second scenario. Sensitivity analysis has shown that biodiesel price variation has significant effect on the process profitability. In summary, integrating supercritical biodiesel production process with ORC appears to be a promising approach for enhancing the process techno-economic profitability and viability.
在过去几年中，利用超临界甲醇解生产生物柴油受到了广泛关注。它能够通过单釜反应将高酸值原料转化为生物柴油。然而，能源密集型工艺是超临界生物柴油工艺的主要缺点。在此，提出了一种将超临界生物柴油工艺与有机朗肯循环（ORC）集成的概念设计，以回收残余热物流并发电。本文对以下三种已开发的方案进行了能量和技术经济比较研究：无能量集成的原始工艺（方案1）、能量集成工艺（方案2）和带有ORC的先进能量集成工艺（方案3）。所开发的带有ORC的集成生物柴油工艺产生的电能不仅满足了工艺用电需求，而且对于年产8000吨生物柴油的工厂还提供了257千瓦的多余电力。技术经济比较分析结果表明，与第二种方案相比，第三种方案的工艺盈利能力提高了36%，更具优势。敏感性分析表明，生物柴油价格变化对工艺盈利能力有显著影响。总之，将超临界生物柴油生产工艺与ORC集成似乎是提高工艺技术经济盈利能力和可行性的一种有前景的方法。
