Studying the Hydroisomerization of Diesel Fractions with Different Concentrations of Nitrogen-Containing Compounds on Bifunctional Catalysts Based on ZSM-23 and Non-Noble Metals

Bogomolova, T.S.; Smirnova, M. Yu.; Климов, О. В.; Носков, А. С.

doi:10.1134/s2070050423020034

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Commercial feedstock is frequently impaired with nitrogen-and sulfur-containing compounds, which could damage the metallic and acidic active sites of bifunctional catalyst [132]. Nitrogen poisoning is a serious issue in catalysis, especially with zeolite-based catalysts employed in n-hexadecane isomerization.…”

Section: The Effect Of Impurities-containing Feedmentioning

confidence: 99%

Hydroisomerization Catalysts for High-Quality Diesel Fuel Production

Aljajan,

Stytsenko,

Rubtsova

et al. 2023

Catalysts

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Upgrading the properties of diesel fractions is considered one of the crucial processes in the petrochemical industry; and for this purpose in laboratory-scale researching it is studied on the base of the hydroisomerization of n-hexadecane as a main model reaction. Recently, zeolite-based bifunctional catalysts have proven their efficiency due to their remarkable acidity, shape-selectivity and relative resistance to deactivation. In this review, different topological-type zeolite-based catalysts, the mechanism of their catalytic effect in n-C16 isomerization, and the principles of shape-selectivity are reviewed. A comparison of their structural-operational characteristics is made. The impact of some feedstock impurities on the catalyst’s performance and deactivation due to carbonaceous deposits as well as various modern eco-friendly cost-effective synthesis techniques are also discussed.

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Section: The Effect Of Impurities-containing Feedmentioning

confidence: 99%

Hydroisomerization Catalysts for High-Quality Diesel Fuel Production

Aljajan,

Stytsenko,

Rubtsova

et al. 2023

Catalysts

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“…Noble metals such as Pt ,− or Pd are commonly used as the hydrogenation/dehydrogenation component of the bifunctional catalysts. There are attempts to replace platinum metals with cheaper nickel, − phosphides, , and sulfides of transition metals. Non-noble metal catalysts usually have weaker hydrogenation/dehydrogenation activity, resulting in a lower yield of isomers …”

Section: Introductionmentioning

confidence: 99%

Role of Zeolite Acidity and Ni Content in Hexadecane Hydroisomerization over Ni/ZSM-23 Catalyst

Parfenov,

Pirutko,

Yakovlev

et al. 2024

Ind. Eng. Chem. Res.

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In this work, a series of ZSM-23 zeolite samples having different acidity due to various Si/Al ratios (30, 50, and 100) was synthesized using DMFA as a template. Two series of bifunctional Ni/ZSM-23 catalysts were prepared: the first one with different Ni content and the second one with different zeolite acidity. Samples were characterized by a set of physicochemical methods and tested in a hexadecane isomerization reaction. It was shown that an increase in the nickel content from 2 to 5 wt % significantly enhanced hexadecane conversion and iso-C16 yield. The catalyst activity depends almost linearly on the zeolite acidity. The maximum iso-C16 yield of 76 wt % was achieved over Ni/ZSM-23 catalyst with a Si/Al ratio of 50 having moderate acidity. The results demonstrate the prospects for implementing low-cost nickel-containing zeolite catalysts for an industrially important reaction such as the hydroisomerization of middle distillates and heavier petroleum fractions.

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Studying the Hydroisomerization of Diesel Fractions with Different Concentrations of Nitrogen-Containing Compounds on Bifunctional Catalysts Based on ZSM-23 and Non-Noble Metals

Cited by 2 publications

References 14 publications

Hydroisomerization Catalysts for High-Quality Diesel Fuel Production

Hydroisomerization Catalysts for High-Quality Diesel Fuel Production

Role of Zeolite Acidity and Ni Content in Hexadecane Hydroisomerization over Ni/ZSM-23 Catalyst

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