Effects of the Zeolite SiO2/Al2O3 Ratio on the Physicochemical Properties and Catalytic Performance of NiMoS Catalysts in Triglyceride Hydroprocessing

IF 1.1 4区工程技术 Q3 CHEMISTRY, ORGANIC

Petroleum Chemistry Pub Date : 2026-08-06 DOI:10.1134/S0965544126600839

Nikolai A. Vinogradov, Elizaveta A. Ardakova, Argam V. Akopyan, Renat R. Zakirov, Dmitriy A. Sladkovskiy, Aleksey A. Pimerzin, Anna V. Vutolkina

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Abstract

A series of NiMo-based sulfide catalysts supported on USY–Al₂O₃ with varying SiO₂/Al₂O₃ molar ratios were synthesized via incipient wetness impregnation. The raw materials, supports, and final catalysts were comprehensively characterized using low-temperature nitrogen adsorption, energy-dispersive X-ray fluorescence (ED-XRF), Fourier-transform infrared spectroscopy of adsorbed pyridine (FTIR-Py), and transmission electron microscopy (TEM). The catalytic performance of the synthesized samples was evaluated in the hydrotreating and hydroisomerization of a triglyceride feedstock. The tests were carried out in a fixed-bed flow-through reactor at 280–340°C and 4 MPa, with a feed liquid hourly space velocity (LHSV) of 1.0–2.0 h^–1 and a H₂/feedstock volumetric ratio of 600 nL/L. The incorporation of zeolite did not impair hydrodeoxygenation performance, while the yield of isomeric products increased with rising SiO₂/Al₂O₃ ratio in the USY zeolite.

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沸石SiO2/Al2O3配比对NiMoS催化剂在甘油三酯加氢过程中理化性质及催化性能的影响

采用初湿浸渍法制备了不同SiO2/Al2O3摩尔比的USY-Al2O3负载镍基硫化物催化剂。采用低温氮吸附、能量色散x射线荧光（ED-XRF）、吸附吡啶的傅里叶变换红外光谱（FTIR-Py）和透射电子显微镜（TEM）对原料、载体和最终催化剂进行了全面表征。对合成的样品在甘油三酯原料加氢处理和加氢异构化反应中的催化性能进行了评价。试验在固定床流式反应器中进行，温度为280 ~ 340℃，压力为4 MPa，进料液时空速（LHSV）为1.0 ~ 2.0 h-1， H2/进料体积比为600 nL/L。沸石的掺入对加氢脱氧性能没有影响，但随着USY沸石中SiO2/Al2O3比例的增加，异构体产物的产率增加。

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来源期刊

Petroleum Chemistry 工程技术-工程：化工

CiteScore

2.50

自引率

21.40%

发文量

102

审稿时长

6-12 weeks

期刊介绍： Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.