Purpose of Review

Many of the highly populated and industrialized countries are paying more attention to green fuels. The conventional methods for biodiesel purification processes result in a large quantity of polluted water, leading to serious environmental concerns. To overcome the challenges in the existing process, addressing the membrane technology is a viable solution to direct further research toward sustainable membrane-based green production.

Recent Findings

The developing membrane technology is an alternative method for eliminating wastewater during biodiesel production from conventional processes. This paper provides a comprehensive review of recent development applications of the catalytic membrane and membrane materials for high-quality biodiesel production. Both polymeric and ceramic membranes result in optimum performance of more than 90% effective conversion and purification. The catalytic membrane reactor integrates chemical reaction and product separation concurrently in a single device system to produce high-quality biodiesel. Glycerol purification of 99% was achieved in the potential membrane distillation process.

Summary

This review critically summarizes biodiesel production and purification using membrane techniques and membrane reactors. Membrane material and separation efficiency were discussed in a short view. Besides, the significance of catalytic membrane reactor is outlined. Glycerol separation and purification by removal of water and other residual impurities were potentially achieved using membrane technology. Apart from applications of the membrane, the novel attempt of a combined description of influencing factors and limitations of the membrane during biodiesel production was revealed. Therefore, membrane applications in high-grade biodiesel and value-added byproduct production are the predominant green technological approach for next-generation biofuels.

Graphical abstract

中文翻译：

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膜在生物燃料工业中用于高质量生物柴油和副产物（甘油）的重要性

审查目的

许多人口稠密和工业化国家越来越重视绿色燃料。用于生物柴油纯化过程的常规方法导致大量的污水，导致严重的环境问题。为了克服现有过程中的挑战，解决膜技术是将进一步的研究转向可持续的基于膜的绿色生产的可行解决方案。

最近的发现

显影膜技术是在常规工艺生产生物柴油过程中消除废水的另一种方法。本文全面概述了催化膜和膜材料在高质量生物柴油生产中的最新开发应用。聚合物膜和陶瓷膜均可实现超过90％的有效转化和纯化效果。催化膜反应器将化学反应和产物分离同时集成在一个装置系统中，以生产高质量的生物柴油。在潜在的膜蒸馏过程中，甘油的纯度达到了99％。

概括

该评论批判性地总结了使用膜技术和膜反应器的生物柴油生产和纯化。简短讨论了膜材料和分离效率。此外，概述了催化膜反应器的意义。通过使用膜技术，可以通过去除水和其他残留杂质来分离和纯化甘油。除了膜的应用以外，还揭示了结合描述生物柴油生产过程中膜的影响因素和局限性的新尝试。因此，膜在高级生物柴油和增值副产品生产中的应用是下一代生物燃料的主要绿色技术方法。

图形概要