Role of Interstitial Solid Solutions in the Formation of the Active Component of Supported Palladium Catalysts for the Selective Hydrogenation of Acetylene to Ethylene

IF 0.7 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2023-09-04 DOI:10.1134/S207005042303008X

D. A. Shlyapin, D. V. Glyzdova, T. N. Afonasenko, V. L. Temerev, A. V. Lavrenov

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Abstract

The concepts of the effect of the adsorption of the reaction medium components on the selective hydrogenation of acetylene to ethylene under the action of supported palladium catalysts have been discussed. The role of interstitial solid solutions of carbon and hydrogen in palladium, which are formed upon contact of the catalyst with the reaction medium, in the occurrence of mass transfer processes between the surface and the subsurface layer of the active component has been shown. The ratio of activation barriers to ethylene desorption/adsorption processes, which determines the acetylene hydrogenation selectivity, can vary depending on the structure of palladium nanoparticles and the electronic state of Pd. In addition, changes in the electronic state affect the energy of the activated desorption of ethylene from palladium particles, and their structural features determine the energy of the activated adsorption and subsequent hydrogenation of ethylene to ethane.

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间隙固溶体在乙炔选择性加氢制乙烯负载型钯催化剂活性组分形成中的作用

讨论了负载型钯催化剂作用下反应介质组分的吸附对乙炔选择性加氢制乙烯的影响。钯中碳和氢的间隙固溶体是催化剂与反应介质接触后形成的，在活性组分的表面和亚表面层之间发生传质过程中发挥了作用。决定乙炔加氢选择性的活性障碍与乙烯脱附/吸附过程的比值取决于钯纳米粒子的结构和钯的电子态。此外，电子态的变化会影响钯粒子对乙烯的活性解吸能，而钯粒子的结构特征决定了活性吸附和随后乙烯加氢制乙烷的能量。

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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.