Pt-ReOx /TiO2催化剂上羧酸加氢的关键中间体

IF 0.7 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2022-12-16 DOI:10.1134/S2070050422040079

N. V. Makolkin, E. A. Paukshtis, V. V. Kaichev, A. P. Suknev, B. S. Bal’zhinimaev, H. U. Kim, J. Jae

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引用次数: 0

摘要

研究了吸附的乙酸形态在Pt-ReOx /TiO2催化剂上的反应性。通过原位傅立叶红外光谱在200°С下鉴定了三种吸附形式的乙酸:双齿醋酸酯和两种分子吸附形式的乙酸。发现两种形式的分子吸附乙酸的消耗速率常数(分别为0.02和0.029 s-1)与在200°С下测量的催化反应常数(0.034 s-1)的数量级接近。结果表明，这两种形式的分子吸附乙酸是Pt-ReOx /TiO2催化剂上醋酸加氢的关键中间体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Key Intermediates in the Hydrogenation of Carboxylic Acids on the Pt–ReOx/TiO2 Catalyst

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Key Intermediates in the Hydrogenation of Carboxylic Acids on the Pt–ReOx/TiO2 Catalyst

The reactivity of adsorbed acetic acid forms on the Pt–ReO_x/TiO₂ catalyst has been studied. Three adsorbed acetic acid forms were identified by in situ Fourier IR spectroscopy at 200°С: bidentate acetates and two forms of molecularly adsorbed acetic acid. The consumption rate constants two forms of molecularly adsorbed acetic acid (0.02 and 0.029 s^–1, respectively) were found to be close in magnitude to the catalytic reaction constant rate (0.034 s^–1) measured at 200°С. It was concluded that these two forms of molecularly adsorbed acetic acid are key intermediates in acetic acid hydrogenation on the Pt–ReO_x/TiO₂ catalyst.

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来源期刊

Catalysis in Industry ENGINEERING, CHEMICAL-

CiteScore

1.30

自引率

14.30%

发文量

期刊介绍： The journal covers the following topical areas: Analysis of specific industrial catalytic processes: Production and use of catalysts in branches of industry: chemical, petrochemical, oil-refining, pharmaceutical, organic synthesis, fuel-energetic industries, environment protection, biocatalysis; technology of industrial catalytic processes (generalization of practical experience, improvements, and modernization); technology of catalysts production, raw materials and equipment; control of catalysts quality; starting, reduction, passivation, discharge, storage of catalysts; catalytic reactors.Theoretical foundations of industrial catalysis and technologies: Research, studies, and concepts : search for and development of new catalysts and new types of supports, formation of active components, and mechanochemistry in catalysis; comprehensive studies of work-out catalysts and analysis of deactivation mechanisms; studies of the catalytic process at different scale levels (laboratory, pilot plant, industrial); kinetics of industrial and newly developed catalytic processes and development of kinetic models; nonlinear dynamics and nonlinear phenomena in catalysis: multiplicity of stationary states, stepwise changes in regimes, etc. Advances in catalysis: Catalysis and gas chemistry; catalysis and new energy technologies; biocatalysis; nanocatalysis; catalysis and new construction materials.History of the development of industrial catalysis.