Comparison of alumina supports and catalytic activity of CoMoP/γ-Al2O3 hydrotreating catalysts obtained using flash calcination of gibbsite and precipitation method

Stolyarova, E. A.; Данилевич, В. В.; Климов, О. В.; Gerasimov, Evgeny Yu.; Ушаков, В. А.; Chetyrin, I.A.; Lushchikova, A.E.; Сайко, А.В.; Кондрашев, Д. О.; Kleimenov, A. V.; Носков, А. С.

doi:10.1016/j.cattod.2019.09.019

Cited by 16 publications

(7 citation statements)

References 55 publications

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“…Values of BET specific area for alumina catalyst agree with reported by other authors [32] . The BET area value decreases when the calcination temperature increases [33] .…”

Section: Resultssupporting

confidence: 90%

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al₂O₃ and CeZrO₂ Catalysts Using RSM[1] Method

et al. 2022

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Catalytic performance of catalysts is influenced by process conditions. In this work the influence of temperature, residence time and C2H5OH feed concentration was investigated in ethanol dehydration reaction using the response surface methodology (RSM) for γ‐Al2O3 and CeZrO2 catalysts. The γ‐Al2O3 was prepared using calcination method and CeZrO2 precipitation method. The process indicators (conversion, yield, selectivity) were modeled through the RSM method, and the equations obtained showed a good fit to the experimental data. The optimization results indicate different optimum conditions for each catalyst. For γ‐Al2O3 at 420 °C, 23.5 % of ethanol concentration and 0.65 gs/L, 0.6 molethylene/molethanol is obtained and total conversion. For CeZrO2 at 495 °C, 59 % ethanol concentration and 300 gs/L, 0.38 molethylene/molethanol is obtained and total ethanol conversion. Catalyst characterization was performed using, XRD (x‐ray diffraction), BET (Brunauer‐Emmett‐Teller surface area analysis), TPR (Temperature‐programmed reduction) and TPD (Temperature‐programmed desorption).

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“…Values of BET specific area for alumina catalyst agree with reported by other authors [32] . The BET area value decreases when the calcination temperature increases [33] .…”

Section: Resultssupporting

confidence: 90%

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al₂O₃ and CeZrO₂ Catalysts Using RSM[1] Method

et al. 2022

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“…The obtained product, due to rapid decomposition, is usually very porous and of developed surface. [50][51][52][53][54] The provision of these qualities is essential since they significantly contribute to catalyst high productivity (by provision of large area of interphase contact and accessibility of active sites). There are reports of successful application of flash calcination in manufacturing catalysts based on hydroxycarbonate precursors.…”

Section: Introductionmentioning

confidence: 99%

On the Effect of Flash Calcination Method on the Characteristics of Cobalt Catalysts for Ammonia Synthesis Process

et al. 2021

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The influence of precursor calcination method on the properties of the cerium and barium promoted cobalt catalysts for ammonia synthesis was investigated. Three methods of cobaltcerium hydroxycarbonates mixture heat treatment were studied -flash, static and semi-static calcination processes, differing in duration as well as heat and mass transfer conditions. Their effect on catalyst structural parameters, morphology, crystal structure and activity was determined. It was proven that compared to other heat treatment methods flash calcination of CoCe hydroxycarbonate precursor resulted with a catalyst of superior structural parameters and the highest activity in ammonia synthesis. However, the incomplete precursor transformation and insufficient active and promoter phases crystallization during this process were indicated. In order to improve surface activity and optimise properties of the catalyst it was stated that modification of flash calcination conditions is required.

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“…A new active phase on the surface of the catalyst may be formed via the interaction of the support with the catalyst. The following characteristics need to be considered when choosing hydroprocessing support materials: mechanical and thermal stability, surface area, acidity, and porosity [34,35] . The composition and distribution of Brønsted acid and Lewis acid sites are also important [36,37] .…”

Section: Roles Of Mineral Materials As Support Materials In Hydroproc...mentioning

confidence: 99%

“…Hydrated aluminosilicates (zeolites), such as NaY, SAPO-11 (34), USY, and ZSM, are gaining more attention as supports due to their good balance of Bronsted and Lewis acid sites, good crystalline structure and controlled porosity, high thermal and mechanical resistance, ease of dispersing active phases optimally, and large surface area [65] . Much attention towards them has increased due to their high isomerization and cracking activities [34,66] . They play an important role in the morphology of the active phase [66] .…”

Section: Zeolite Supportsmentioning

confidence: 99%

Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

Majodina,

Poswayo,

Dembaremba

et al. 2023

Miner Miner Mater

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Mineral materials play a pivotal in heterogeneous catalysts as active, support, or promoter components, with the oil refinery industry being one of the biggest beneficiaries. While conventional hydroprocessing catalysts have historically met the industry’s needs, the growing need to accommodate unique feedstocks, meet the increasing demand for environmentally acceptable products, obtain better product specifications, enhance selectivity for reactions to increase ratios for certain product cuts, and use more cost-effective and abundant mineral materials, has recently motivated for fresh considerations in the development of hydroprocessing catalysts. Based on periodic trends, noble metals possess the most desirable qualities, but their relative abundance in the Earth’s crust is too low to meet industry needs. They are costly and highly sensitive to sulfur poisoning. Mo and W lie in the sweet spot, but it is anticipated that they cannot meet the increasing demand. Investigations of electronic interactions of more economical and abundant metals, such as Nb, V, and Fe, with other elements and support materials have yielded a better understanding of synergistic effects that help to access noble metal-like qualities. This work contrasts conventional hydroprocessing catalysts and recently improved catalysts, detailing the chemistry considerations behind the selection of mineral materials used in the catalysts. It also explores how further manipulation of these mineral materials and synthesis approaches is driving toward more desirable properties. The work brings to the attention of the readers the challenges and opportunities for the further improvement of hydroprocessing catalysts to ensure environmental sustainability while meeting the industry’s growing needs.

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Comparison of alumina supports and catalytic activity of CoMoP/γ-Al2O3 hydrotreating catalysts obtained using flash calcination of gibbsite and precipitation method

Cited by 16 publications

References 55 publications

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al₂O₃ and CeZrO₂ Catalysts Using RSM[1] Method

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al₂O₃ and CeZrO₂ Catalysts Using RSM[1] Method

On the Effect of Flash Calcination Method on the Characteristics of Cobalt Catalysts for Ammonia Synthesis Process

Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

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Comparison of alumina supports and catalytic activity of CoMoP/γ-Al2O3 hydrotreating catalysts obtained using flash calcination of gibbsite and precipitation method

Cited by 16 publications

References 55 publications

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al2O3 and CeZrO2 Catalysts Using RSM[1] Method

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al2O3 and CeZrO2 Catalysts Using RSM[1] Method

On the Effect of Flash Calcination Method on the Characteristics of Cobalt Catalysts for Ammonia Synthesis Process

Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

Contact Info

Product

Resources

About

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al₂O₃ and CeZrO₂ Catalysts Using RSM[1] Method

Modeling and Optimization of Ethanol to Ethylene Production over γ‐Al₂O₃ and CeZrO₂ Catalysts Using RSM[1] Method