Opportunities and Emerging Challenges of the Heterogeneous Metal-Based Catalysts for Vegetable Oil Epoxidation
Opportunities and Emerging Challenges of the Heterogeneous Metal-Based Catalysts for Vegetable Oil Epoxidation
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DOI：
10.1021/acssuschemeng.2c00617
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Wenjuan Yan;Zhenyang Wang;Chen Luo;Xingfan Xia;Zhifei Liu;Yuming Zhao;Feng Du;Xin Jin
中科院分区：
文献类型：
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作者：
Wenjuan Yan;Zhenyang Wang;Chen Luo;Xingfan Xia;Zhifei Liu;Yuming Zhao;Feng Du;Xin Jin
由食用或非食用植物油制得的环氧化植物油因其具有良好的生物降解性、可再生性、无毒性和环境友好性而受到广泛关注。它在化学工业中具有广泛的应用，例如，生物润滑剂、聚氨酯、交联聚合物、涂料和生物柴油。目前，工业上通过使用原位形成的过羧酸的均相环氧化方法来生产。然而，这种方法对环氧化物的选择性差，并对反应器造成严重腐蚀。高效且可回收的多相金属基材料由于在不存在任何腐蚀性酸的情况下具有良好的活性和选择性而成为植物油环氧化的有希望的替代品。因此，开发高活性、高选择性、高稳定性的多相催化剂用于植物油及其衍生物的环氧化反应已成为学术界和工业界的一项重要任务。本文从催化剂的制备、形貌、重复使用性、结构与功能的关系以及反应机理等方面对近五年来催化剂的研究进展进行了综述。本文还对溶剂、氧化剂、反应器类型、操作条件以及反应动力学等因素对植物油环氧化反应的影响进行了综述和讨论，以期为植物油环氧化反应的进一步研究提供指导。
Epoxidized vegetable oils obtained from either edible or nonedible vegetable oil have drawn extensive attention ascribing to the inherent nature of good biodegradability, renewableness, nontoxicity, and environmental friendliness. It has a broad application in the chemical industry, e.g., biolubricants, polyurethane, cross-linked polymers, coatings, and biodiesel. Currently, it is produced industrially by a homogeneous epoxidation process using in situ formed peracarboxylic acid. However, this method gives poor selectivity toward epoxides and causes severe corrosion to reactors. Efficient and recyclable heterogeneous metal-based materials have become promising alternatives for vegetable oil epoxidation due to the good activity and selectivity in the absence of any corrosive acids. Hence, the development of highly active, selective, and stable heterogeneous catalysts for the epoxidation of vegetable oils and their derivatives has becoming a major task for both academic and industrial communities. In this work, we have reviewed and summarized the most recent progress of catalysts development in the aspects of catalysts preparation, morphology, reusability, structure–function relationship, and reaction mechanism in the past five years. The effects of solvent, oxidant, type of reactor, and operating conditions as well as the reaction kinetics will also be reviewed and discussed to provide guidance for the future study of vegetable oil epoxidation.