Hydrodeoxygenation of Sunflower Oil on Pt/WOx-Al2O3 Catalyst

IF 0.7 Q4 ENGINEERING, CHEMICAL Catalysis in Industry Pub Date : 2024-05-27 DOI:10.1134/S2070050424700090

A. A. Nepomnyashchii, V. L. Yurpalov, E. A. Buluchevskiy, V. A. Drozdov, T. I. Gulyaeva, R. M. Mironenko, A. V. Lavrenov

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Abstract

The authors study the effect of the tungsten oxide in the supports of 0.5% Pt/WO_x-Al₂O₃ catalysts on their acidity, deposited platinum dispersity, and catalytic properties in the hydrodeoxygenation of sunflower oil. It is shown that the of Brønsted acid sites on its surface grows, and the dispersity of deposited platinum in the ready catalyst is reduced when the content of the modifier is increased. The studied samples ensure complete sunflower oil conversion in a hydrogen atmosphere at a liquid weight hourly space velocity (WHSV) of 1 h⁻¹, a temperature of 380°C, and a total pressure of 4 MPa the composition of the support. A nearly stoichiometric yield of C₅₊ products at a level of 82–86 wt % is attained. The acidic properties of the 0.5% Pt/WO_x-Al₂O₃ system determine the possibility for synthesizing the components of diesels with high contents of iso-alkanes as a result of sunflower oil hydrodeoxygenation. Using a catalyst with a nominal tungsten content of 15 wt % WO₃ brings the content of iso-paraffins up to 74% with complete conversion of the initial feedstock for no less than 24 h.

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葵花籽油在 Pt/WOx-Al2O3 催化剂上的加氢脱氧反应

摘要作者研究了 0.5% Pt/WOx-Al2O3 催化剂载体中的氧化钨对其酸度、沉积铂分散度以及葵花籽油加氢脱氧催化性能的影响。结果表明，当改性剂的含量增加时，其表面的布氏酸位点增加，沉积在成品催化剂中的铂的分散度降低。所研究的样品可确保在氢气环境中，在液体重量时空速度（WHSV）为 1 h-1、温度为 380°C、总压强为 4 MPa 的条件下实现葵花籽油的完全转化。C5+ 产物的产量几乎达到了 82-86 wt %。0.5% Pt/WOx-Al2O3 系统的酸性特性决定了合成葵花籽油加氢脱氧过程中异构烷烃含量较高的柴油组分的可能性。使用标称钨含量为 15 wt % WO3 的催化剂，可使异链烷烃的含量达到 74%，初始原料的完全转化时间不低于 24 小时。

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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.