Performance of Zr- and P-modified USY-based catalyst in hydrocracking of vacuum gas oil

Cui, Qingyan; Wei, Qiang; Yu, Guanglin; Zhu, Liqiang

doi:10.1016/j.fuproc.2012.09.010

Cited by 53 publications

(39 citation statements)

References 31 publications

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“…In addition, the amount of hydrogen consumed at rst temperature peak for NMA (EG), NMA (G) and NMA (U) samples were around 5%, 7% and 21% less than NMA (CA) sample, respectively. This result indicated the formation of well-dispersed metal active phases in the NMA (CA) [61]. It should be noted that, the NMA (U) nanocatalyst showed a peak at a higher temperature, followed by 0.621 mmol g − 1 hydrogen consumption, indicating the strong interaction of deposited metal to the alumina support.…”

Section: Tpr Analysismentioning

confidence: 74%

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WITHDRAWN: Fabrication of Nimo Nanostructured Catalyst via Ultrasonic-Assisted Combustion Method Used in High Efficiency Thiophene Hydrodesulfurization: Influence of Organic Compound Type

Hamidi¹,

Khoshbin²,

Karimzadeh³

2020

Preprint

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Alumina supported NiMo nanocatalysts were synthesized through ultrasonic-assisted combustion method with various organic additives, including citric acid, ethylene glycol, glycine and urea using in hydrodesulfurization of thiophene at atmospheric pressure. The samples were characterized by XRD, TGA, FESEM, EDX, BET-BJH and TPR analyses. The results indicated that the type of organic compound has a noticeable effect on phase structure, surface morphology and reducibility potential as a consequence of different amount of heat and gaseous products released during combustion reaction. Our method showed that a relatively homogeneous distribution of the active material over the support can be achieved. Using citric acid as an organic additive, led to synthesis of nanocatalyst in which more than 90% of particles are less than 70 nm. The sample synthesized by citric acid exhibited the highest activity in hydrodesulfurization reaction due to its significant properties such as high surface area, considerable surface hole and weakened metal-support interaction compared with other organic additives. In addition, activity assessment of the prepared catalyst by ethylene glycol and glycine demonstrated that 100% abatement of thiophene can be achieved at 105 °C and 30 min.

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Section: Tpr Analysismentioning

confidence: 74%

“…The reduction peaks at 700-1000 °C can be assigned to subsequent reduction of octahedral Mo species which have strong interaction with support and the reduction of tetrahedrally coordinated Mo oxide. Besides, the reduction peak located at 600-700 °C has been attributed to the reduction of Ni 2+ on the surface of the alumina [61,62].…”

Section: Tpr Analysismentioning

confidence: 99%

WITHDRAWN: Fabrication of Nimo Nanostructured Catalyst via Ultrasonic-Assisted Combustion Method Used in High Efficiency Thiophene Hydrodesulfurization: Influence of Organic Compound Type

Hamidi¹,

Khoshbin²,

Karimzadeh³

2020

Preprint

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“…Reducing the crystal size in the nanoscale range (<100 nm) makes considerable differs in the physicochemical properties of the zeolite, especially in the external surface area, the micropore volume, and the fraction of acid sites dispersed on the external surface of the crystals [2]. Y-zeolite is used as a part of the hydrocracking catalyst, because of its high acid strength, controlled density of acid sites, high hydrogen-transfer ability, and superior performance in the hydrocracking process compared to other supports [3][4][5]. Beta-zeolite with large pore has also shown as a part of hydrocracking catalysts [6], but zeolite has a high selectivity to gases that cause restricting the commercial application of this compound.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst

Hadi¹,

Aghabozorg²,

Bozorgzadeh³

et al. 2018

Bull. Chem. React. Eng. Catal.

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In this paper, three different kinds of aluminum sources (sodium aluminate, aluminum sulfate and aluminum isopropylate) were used for preparing of nano beta-zeolite. The as synthesized zeolites were mixed with the as prepared amorphous silica-alumina to produce the supports for hydrocracking catalyst. The prepared supports were used for preparation of NiMo/silica alumina-nano beta-zeolite by impregnation method. The influence of the aluminum source for preparation of beta-zeolite on the performance of the prepared catalysts has been studied. The samples were thoroughly characterized by X-Ray diffraction method (XRD), field emission-scanning electron microscopy (FE-SEM), N2 adsorption-desorption isotherms (BET), temperature programmed desorption (TPD) and temperature programmed reduction (TPR) methods. The catalysts performance was evaluated by vacuum gas oil (VGO) hydrocracking at 390 oC in a fixed bed reactor. The XRD patterns showed that the beta-zeolite samples obtained from the present methods were pure and highly crystalline and the crystal size of the prepared zeolites were in nanometer scale. Crystallite size of nano beta-zeolite synthesized by aluminum isopropylate [Al(iPrO)3] was smaller than those of prepared by the other aluminum sources. The catalyst containing this zeolite with higher surface area (231 m2/g) and more available acid sites (1.66 mmol NH3/g) possessed higher activity and selectivity to gas oil (71.9 %). Copyright © 2018 BCREC Group. All rights reservedReceived: 25th April 2018; Revised:22nd July 2018; Accepted: 29th July 2018How to Cite: Hadi, M., Aghabozorg, H.R., Bozorgzadeh, H.R., Ghasemi, M.R. (2018). The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (3): 543-552 (doi:10.9767/bcrec.13.3.2570.543-552)Permalink/DOI: https://doi.org/10.9767/bcrec.13.3.2570.543-552

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“…There are relatively few systematic studies about such structure-performance relations concerning hydrocracking of real feedstocks with the purpose of producing middle distillates [6,7]. Recent research has focused on the development of improved USY-based catalysts with high activity towards middle distillates [8][9][10][11][12][13], driven by the increased diesel demand in many countries [14].…”

Section: Introductionmentioning

confidence: 99%

Influence of steam-calcination and acid leaching treatment on the VGO hydrocracking performance of faujasite zeolite

Agudelo

Hensen

Giraldo

et al. 2015

Fuel Processing Technology

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Performance of Zr- and P-modified USY-based catalyst in hydrocracking of vacuum gas oil

Cited by 53 publications

References 31 publications

WITHDRAWN: Fabrication of Nimo Nanostructured Catalyst via Ultrasonic-Assisted Combustion Method Used in High Efficiency Thiophene Hydrodesulfurization: Influence of Organic Compound Type

WITHDRAWN: Fabrication of Nimo Nanostructured Catalyst via Ultrasonic-Assisted Combustion Method Used in High Efficiency Thiophene Hydrodesulfurization: Influence of Organic Compound Type

The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst

Influence of steam-calcination and acid leaching treatment on the VGO hydrocracking performance of faujasite zeolite

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