Dynamics of Silicon Sorption on the NiMo/Al2O3 Guard Bed Catalyst During Hydrotreating of Diesel

IF 1.3 4区工程技术 Q3 CHEMISTRY, ORGANIC Petroleum Chemistry Pub Date : 2024-01-10 DOI:10.1134/s0965544123090037

I. S. Golubev, P. P. Dik, R. V. Petrov, I. A. Mik, N. V. Bessonova, S. I. Reshetnikov, A. S. Noskov

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Abstract

The dynamics of the silicon sorption on the NiMo/Al₂O₃ guard-bed catalyst containing ~2.0 wt % Ni and ~6.0 wt % Mo during hydrotreating of diesel was studied. The catalyst bed was divided into five equal sections separated by perforated metal partitions permeable to the feed. Four series of experiments were performed; their time was varied in the range 48–200 h, and the temperature was 340°C. A diesel fraction containing ~1.0 wt % sulfur, 130 ppm nitrogen, and 200 ppm silicon introduced in the form of decamethylcyclopentasiloxane was used as the feed. The specific surface area of all the spent samples was 170–190 m²/g, the pore volume was 0.35– 0.43 cm³/g, and the average pore diameter was 8–9 nm. The sorption on a catalyst grain 2.5 mm in diameter is diffusion-controlled. The effective mass transfer coefficient and the catalyst capacity under the experimental conditions (5 wt %) were estimated using the equation describing the sorption process.

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柴油加氢处理过程中 NiMo/Al2O3 吸附床催化剂上硅吸附的动态变化

摘要研究了在柴油加氢处理过程中，含 ~2.0 wt % Ni 和 ~6.0 wt % Mo 的 NiMo/Al2O3 保护床催化剂上硅吸附的动态。催化剂床层被分成五个相等的部分，并由可渗透进料的穿孔金属隔板隔开。共进行了四个系列的实验；实验时间在 48 至 200 小时之间变化，实验温度为 340°C。进料采用了含硫约 1.0 wt %、氮 130 ppm 和硅 200 ppm 的柴油馏分，其形式为十甲基环五硅氧烷。所有废样品的比表面积为 170-190 m2/g，孔体积为 0.35- 0.43 cm3/g，平均孔直径为 8-9 nm。直径为 2.5 毫米的催化剂颗粒上的吸附是扩散控制的。利用描述吸附过程的方程估算了实验条件（5 wt %）下的有效传质系数和催化剂容量。

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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.