Catalytic oxidation of glycerol in alkaline medium – Influence of mass transport limitations,The Canadian Journal of Chemical Engineering

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Catalytic oxidation of glycerol in alkaline medium – Influence of mass transport limitations
The Canadian Journal of Chemical Engineering ( IF 1.6 ) Pub Date : 2022-07-28 , DOI: 10.1002/cjce.24576
Ashutosh Namdeo ₁ , Jainesh H. Jhaveri ₂ , S. M. Mahajani ₂ , A. K. Suresh ₂

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Glycerol upgradation via oxidation is characterized by a complex reaction network, further complicated by the heterogeneous (gas/liquid/solid) nature of the reaction. Thus, rates and selectivities could be significantly modified by transport limitations, especially in industrial reactors. In this work, we have studied the reaction on supported Pd and Au catalysts under alkaline conditions, both in the absence and presence of transport resistances, both external and internal. Reaction pathways proposed on the basis of data under kinetic control have been used to rationalize the findings. Interestingly and counterintuitively, the selectivity to C₃ compounds is better under the influence of mass transfer. This behaviour is because of the nature of the reaction, which involves solution-mediated reactions in addition to the metal-catalyzed reactions on the catalyst surface. These findings have important implications for the scale up of this reaction and process design methodology.

中文翻译：

甘油在碱性介质中的催化氧化——传质限制的影响

通过氧化升级甘油的特点是反应网络复杂，反应的多相（气体/液体/固体）性质进一步复杂化。因此，速率和选择性可能会因运输限制而显着改变，尤其是在工业反应器中。在这项工作中，我们研究了在碱性条件下负载型 Pd 和 Au 催化剂上的反应，无论是否存在外部和内部传输阻力。根据动力学控制下的数据提出的反应途径已被用于使研究结果合理化。_{有趣且违反直觉的是，对 C 3}的选择性化合物在传质的影响下更好。这种行为是由于反应的性质，除了催化剂表面的金属催化反应外，还涉及溶液介导的反应。这些发现对于扩大这种反应和工艺设计方法具有重要意义。

更新日期：2022-07-28

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