Examination onto the mechanism of the heterogeneously catalyzed partial oxidation of acrolein to acrylic acid on heteropolyacids - structure, function and dynamics of the catalyst

杂多酸非均相催化丙烯醛部分氧化成丙烯酸的机理研究——催化剂的结构、功能和动力学

• 批准号: 243501655
• 负责人: Professorin Dr. Barbara Albert
• 金额: --
• 依托单位: Rektorat
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/243501655?language=en
• 关键词: Examination; onto; mechanism; heterogeneously; catalyzed

The heterogeneously catalyzed partial oxidation of acrolein to acrylic acid on Mo/V/W-mixed oxides was examined in the working group of Prof. Vogel via transient kinetic methods (e.g., TPReaction, SSITKA) as well as kinetic simulations. The understanding about the reaction kinetics and the mechanism could be extended by this approach considerably, e.g., in [Jekewitz2012]. In the partial oxidation of methacrolein, however, heteropolyacids are applied in technical processes (e.g., H2Cs2 [Mo11PVOx]). Unfortunately, for this heterogeneous catalyzed reaction knowledge gaps are still existing, about the understanding of the kinetics and the catalytic mechanism. Based on the well-known catalytic mechanism of the partial oxidation of acrolein on Mo/V/W-mixed oxides the mechanism of the partial oxidation of acrolein on heteropolyacids should be cleared up. Therefore, transient kinetic methods and structural chemical investigations should be applied in order to gain more detailed in situ information about the dynamics, structure and function of the heteropolyacids. If one succeeds in understanding the differences between the mechanisms on mixed oxides and heteropolyacids, this could lead to the improvement of the industrially applied process (methacrolein to methacrylic acid on heteropolyacids).

Vogel教授的工作组通过瞬态动力学方法（例如，TPReaction，SSITKA）以及动力学模拟。通过这种方法可以大大扩展对反应动力学和机理的理解，例如，在[Jekewitz 2012]中。然而，在异丁烯醛的部分氧化中，杂多酸应用于技术方法（例如，H2Cs2 [Mo11PVOx]）。不幸的是，对于这种多相催化反应的知识差距仍然存在，关于动力学和催化机理的理解。基于丙烯醛在Mo/V/W复合氧化物上部分氧化的催化机理，对丙烯醛在杂多酸上部分氧化的机理进行了进一步的研究。因此，瞬态动力学方法和结构化学调查应适用于以获得更详细的动力学，结构和功能的杂多酸的原位信息。如果人们成功地理解了混合氧化物和杂多酸的机理之间的差异，这可能会导致工业应用过程的改进（在杂多酸上从甲基丙烯醛到甲基丙烯酸）。