Ethylene Conversion to Propylene over a NiO–MoO3/Al2O3 Catalyst: Effect of Conditions and Kinetics of the Process

IF 1.3 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2025-07-31 DOI:10.1134/S2070050425700199

T. R. Karpova, A. V. Lavrenov, M. A. Moiseenko, O. V. Potapenko, V. A. Koveza, E. A. Buluchevskii, A. B. Arbuzov, A. V. Vasilevich

引用次数: 0

Abstract

The effect of the conditions of ethylene conversion to propylene on the product yield and the activity and stability of a NiO–MoO₃/Al₂O₃ catalyst has been studied. Tests in a flow reactor with a fixed catalyst bed at temperatures of 100–250°C, near-atmospheric pressure, and an ethylene weight hourly space velocity of 0.25–2 h⁻¹ have been conducted. It has been found that the maximum propylene yield of 57 wt % is achieved at 150°C and 0.25 h⁻¹. The ethylene conversion reaches 89%. A kinetic model of the process to describe the formation of the main reaction products has been proposed. It has been shown that, during ethylene conversion, carbon deposits are formed on the surface of the catalysts; when the temperature and contact time are increased, the amount of deposits grows, and the oxidation state of molybdenum atoms changes from +6 to +4/+5.

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NiO-MoO3 /Al2O3催化剂上乙烯转化丙烯：工艺条件和动力学的影响

研究了乙烯制丙烯的工艺条件对产物收率及NiO-MoO3 /Al2O3催化剂的活性和稳定性的影响。试验在固定催化剂床的流动反应器中进行，温度为100-250°C，近大气压，乙烯重量每小时空速为0.25-2 h−1。在150°C和0.25 h - 1条件下，丙烯收率可达57 wt %。乙烯转化率达89%。提出了描述主要反应产物形成过程的动力学模型。结果表明，在乙烯转化过程中，催化剂表面会形成碳沉积；随着温度和接触时间的增加，沉积量增加，钼原子的氧化态由+6变为+4/+5。

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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.