Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane

Смоликов, М. Д.; Shkurenok, V. A.; Bikmetova, L. I.; Prosvirin, Igor P.; Gulyaeva, T. I.; Bukhtiyarov, Andrey V.; Paukshtis, E. A.; Bukhtiyarov, V. I.; Лавренов, А. В.

doi:10.1016/j.mcat.2022.112527

Cited by 6 publications

(5 citation statements)

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“… 29 The decrease in acidity of 3% MoO x -Pd/Ce-M may be due to MoO x being a positively charged atomic cluster, which could mask some of the acidic sites of the catalyst and reduce the number of acid centers in the molecular sieve. 13 Fig. 1 in the supporting information † showed the Py-IR spectra of Pd/Ce-MCM-48 and 2% MoO x -Pd/Ce-M catalysts.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…During the activation process of the catalyst, palladium can promote the reduction of surface atoms and also play a certain role in the formation of acidic properties in alkane isomerization catalysts. 13 Introducing other heterogeneous components to improve the microstructure and electronic properties of catalysts is an important means to enhance the performance of the catalysts. In recent years, research results on the functional compounds of molybdenum in petrochemical applications have showed that molybdenum has strong hydrogen activation ability, molybdenum oxide has hydrogenation dehydrogenation activity, and MoO 3 contains both Brønsted acid and Lewis acid.…”

Section: Introductionmentioning

confidence: 99%

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Study on the preparation and n-heptane isomerization performance of MoO_x-Pd/Ce-MCM-48 catalyst

Cui,

Dong,

Jiang

et al. 2024

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the preparation and n-heptane isomerization performance of MoO_x-Pd/Ce-MCM-48 catalyst

Cui,

Dong,

Jiang

et al. 2024

RSC Adv.

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“…In a previous study, 37 we experimentally explored the effect of metal function on the Pd/WZ catalyst on the isomerization of heptane. It was found that both isomerization and cracking take place without the metal component but with lower conversion.…”

Section: Insights On the N-c 7 −Hydrosemerization Mechanism On Pt/wzmentioning

confidence: 99%

“…A catalyst based on Pt/WO 3 /ZrO 2 (Pt/WZ) is used for the hydroisomerization of n -heptane, as in a previous work . The relatively high acidity of this bifunctional catalyst is provided by the presence of both Brønsted acid sites (BAS) and Lewis acid sites (LAS). − …”

Section: Introductionmentioning

confidence: 99%

Prediction of Alkyl Carbenium Ion Concentrations and Octane Number Increase in Heptane Hydroisomerization over a Pt/WO₃/ZrO₂ Catalyst

Sotelo-Boyás,

Smolikov,

Shkurenok

et al. 2023

Ind. Eng. Chem. Res.

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The hydroisomerization of n-heptane is an alternative technological pathway to produce high-quality gasoline that can be improved through the development of suitable catalysts, kinetic modeling, and reactor optimization. In pursuit of this objective, a fundamental kinetic modeling of the hydroisomerization of n-heptane on a Pt/WO 3 /ZrO 2 catalyst was carried out following the single-event kinetics methodology and considering a predominant monofunctional mechanism in which elementary steps on both Brønsted and Lewis acid sites were modeled. The reactions were carried out in a temperature range between 433.15 and 513.15 K at 15 bar. The elementary steps on acid sites were the rate-determining steps, and the rates of reactions were written in terms of the alkyl carbenium ion concentrations, without molecular relumping. Instead, a relumping was made at the carbenium ion level to directly follow the selectivity and conversion of each group of carbenium ion isomers. In this way, the concentrations of reaction intermediates on both Brønsted and Lewis acid sites can be monitored through the reactor without the need to develop and solve complex equations. The desorption of carbenium ions on both sites was found to be by far the fastest step. The simulation of the process showed that it is possible to increase the research octane number by 54.5 units for a recovery fuel of 90.4 vol %. Modeling at the carbenium ion level allows a high predictive capability of the simulator and can subsequently lead to more reliable design and optimization of hydroisomerization reactors.

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Porous Alumina-Supported Tungstated Zirconia Catalysts for Heptane Isomerization

Smolikov,

Shkurenok,

Yablokova

et al. 2024

Catal. Ind.

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Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane

Cited by 6 publications

References 83 publications

Study on the preparation and n-heptane isomerization performance of MoO_x-Pd/Ce-MCM-48 catalyst

Study on the preparation and n-heptane isomerization performance of MoO_x-Pd/Ce-MCM-48 catalyst

Prediction of Alkyl Carbenium Ion Concentrations and Octane Number Increase in Heptane Hydroisomerization over a Pt/WO₃/ZrO₂ Catalyst

Porous Alumina-Supported Tungstated Zirconia Catalysts for Heptane Isomerization

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Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane

Cited by 6 publications

References 83 publications

Study on the preparation and n-heptane isomerization performance of MoOx-Pd/Ce-MCM-48 catalyst

Study on the preparation and n-heptane isomerization performance of MoOx-Pd/Ce-MCM-48 catalyst

Prediction of Alkyl Carbenium Ion Concentrations and Octane Number Increase in Heptane Hydroisomerization over a Pt/WO3/ZrO2 Catalyst

Porous Alumina-Supported Tungstated Zirconia Catalysts for Heptane Isomerization

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Study on the preparation and n-heptane isomerization performance of MoO_x-Pd/Ce-MCM-48 catalyst

Study on the preparation and n-heptane isomerization performance of MoO_x-Pd/Ce-MCM-48 catalyst

Prediction of Alkyl Carbenium Ion Concentrations and Octane Number Increase in Heptane Hydroisomerization over a Pt/WO₃/ZrO₂ Catalyst