Hydrodesulfurization of 4,6-dimethyldibenzothiophene over NiMo sulfide catalysts supported on meso-microporous Y zeolite with different mesopore sizes

Zhou, Yasong; Wei, Qiang; Liu, Meifang; Ding, Sijia; Yang, Qi

doi:10.1016/j.apcatb.2018.07.042

Cited by 123 publications

(72 citation statements)

References 62 publications

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“…Their results demonstrated that the uorinated prepared catalysts were 75% more e cient than non-uorinated samples. According to the literature, several methods have been applied for the preparation of HDS catalysts, classi ed as precipitation [22], sequential or co-impregnation [23,24], sol-gel [25], chemical vapor deposition (CVD) [26] and hydrothermal deposition [27]. Although these techniques can produce advanced HDS catalysts, they demonstrated disadvantages such as complicated experimental devices, lengthy preparation time, multitudes of preparation steps, high energy requirement, costly substances and environmental contamination [28,29].…”

Section: Introductionmentioning

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WITHDRAWN: Fabrication of Nimo Nanostructured Catalyst via Ultrasonic-Assisted Combustion Method Used in High Efficiency Thiophene Hydrodesulfurization: Influence of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

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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“…The mesoporous silicates such as MCM-41 and SBA-15 have received great attention in the last decades due to their excellent properties as catalyst support in hydrotreating reactions [30][31][32][33][34][35][36]. These catalysts have reported a high catalytic activity in the HDS of DBT than their counterpart supported on alumina.…”

Section: Hds Catalysts Supported On Mesoporous Silicatesmentioning

confidence: 99%

The Silicon on the Catalysis: Hydrodesulfurization of Petroleum Fractions

Cabrera‐Munguía¹,

Rosales-Marines²,

Rubio-Ríos³

et al. 2019

Silicon Materials

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The use of silicon in hydrodesulfurization (HDS) catalysts has had an impact on some of the fundamental parameters for the performance of the HDS catalyst, such as dispersion of the active phase, the extent of sulfidation, or the level of promotion. Mesoporous silicates such as MCM-41, SBA-15, the modified surface of γ-alumina with silica, or mixed Al 2 O 3-SiO 2 support have showed to affect the metal-support interaction, favoring the so-called type II Co(Ni)-Mo(W)-S structures. The aim of this chapter is to elaborate an analysis on the recent advances in the synthesis design of silicon catalyst support for the hydrodesulfurization of petroleum fractions.

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“…As environmental laws and regulations for transportation fuels becomes stricter, the production of ultralow-sulfur fuels has received increasing attention to improve the fuel quality and to reduce the exhaust emission [1][2][3][4][5]. To achieve these goals, the refractory sulfur compounds, such as DBT and 4,6-DMDBT must be removed from the transportation fuels [6][7][8][9][10], in which 4,6-DMDBT is one of the most challenging species to be removed from the raw oils due to its high steric resistance [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Dendritic micro–mesoporous composites with center-radial pores assembled by TS-1 nanocrystals to enhance hydrodesulfurization activity of dibenzothiophene and 4,6-dimethyldibenzothiophene

Wang

Xiao

Zheng

et al. 2020

Journal of Catalysis

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A novel dendritic composite (TD) with an open center-radial pore structure using TS-1 nanocrystals as microporous precursors were synthesized successfully by a facile method. TS-1 nanocrystals were embedded into the framework of dendritic mesoporous silica nanospheres (DMSNs) to form Si-O-Ti bonds, which was beneficial to generate more S vacancies of MoS2 active phases. NiMo/TD-2 catalyst had a larger surface area and higher metal-support-interaction (MSI), resulting in a higher sulfidation and dispersion degrees of MoS2 active phases over the sulfided NiMo/TD-2 catalyst, which was consequently favored to improve the HDS activity of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). Furthermore, the NiMo/TD-2 catalyst with SiO2/TiO2 molar ratio of 150 exhibited higher hydrodesulfurization (HDS) performances of DBT and 4,6-DMDBT than other NiMo/TD catalysts and the commercial NiMo/Al2O3 catalyst. Moreover, the NiMo/TD-2 catalyst possessed higher Brønsted (B) and lewis (L) acid sites, thus promoted the hydrogenation (HYD) of DBT and the isomerization (ISO) of 4,6-DMDBT.

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Hydrodesulfurization of 4,6-dimethyldibenzothiophene over NiMo sulfide catalysts supported on meso-microporous Y zeolite with different mesopore sizes

Cited by 123 publications

References 62 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 Silicon on the Catalysis: Hydrodesulfurization of Petroleum Fractions

Dendritic micro–mesoporous composites with center-radial pores assembled by TS-1 nanocrystals to enhance hydrodesulfurization activity of dibenzothiophene and 4,6-dimethyldibenzothiophene

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