Mechanistic Study on the Selective Oxidation of Acrolein to Acrylic Acid concerning the Role of Water,ChemCatChem

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Mechanistic Study on the Selective Oxidation of Acrolein to Acrylic Acid concerning the Role of Water
ChemCatChem ( IF 3.8 ) Pub Date : 2020-05-18 , DOI: 10.1002/cctc.201902348
Stefan Knoche ₁ , Maurice Heid ₁ , Niklas Gora ₁ , Dominik Ohlig ₁ , Alfons Drochner ₁ , Bastian Etzold ₁ , Herbert Vogel ₁

Affiliation

The activity of Mo/V/W mixed oxide catalyst in the gas phase oxidation of acrolein to acrylic acid is tremendously influenced by addition of fed water. This effect of water is investigated and connected to the catalytic mechanism by several stationary kinetic measurements and transient response methods, such as temperature‐programmed reduction, oxidation and desorption experiments, special concentration‐programmed methods as well as H₂¹⁸O‐SSITKA and D₂O‐SSITKA experiments. Furthermore, kinetic modeling, based on results of H₂¹⁸O‐SSITKA experiments in a wide temperature and feed water content range gives access to kinetic parameters of single reaction steps in the catalytic mechanism. The developed mechanism is not only able to describe conversion and selectivities, inclusively the effect of water, but also describes the ¹⁸O‐degree of labeling of all reaction components quantitatively.

中文翻译：

关于水作用的丙烯醛选择性氧化为丙烯酸的机理研究

Mo / V / W混合氧化物催化剂在丙烯醛气相氧化成丙烯酸中的活性受到进料水的添加的极大影响。通过多种静态动力学测量和瞬态响应方法（例如程序升温还原，氧化和解吸实验，特殊的程序升温方法以及H ₂¹⁸ O-SSITKA和D ）研究了水的这种作用并将其与催化机理联系起来_2个O‐SSITKA实验。此外，基于H ₂^18的结果进行动力学建模在较宽的温度和给水含量范围内进行O‐SSITKA实验，可以在催化机理中访问单个反应步骤的动力学参数。发达的机制不仅能够描述转化率和选择性，包括水的影响，而且能够定量描述所有反应组分的¹⁸ O-度标记。

更新日期：2020-07-06

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