Hydrocracking of vacuum residue using NiWS( x ) dispersed catalysts

Hur, Young Gul; Lee, Dae Won; Lee, Kwan Young

doi:10.1016/j.fuel.2016.08.027

Cited by 33 publications

(15 citation statements)

References 48 publications

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“…This section describes the structure-activity relationship of promoted and un-promoted bulk MoS 2 catalysts derived from the decomposition of precursors such as thio-salts [128][129][130], an alkyl group-containing salts [131][132][133][134] and oxythiosalts [135,136], and others. Various factors associated with the catalyst performance and their effect on HDS activity and selective path (hydrogenation (HYD) or direct desulfurization (DDS)) have been reported in the literature, these include, the effect of carbon, promoter effect, transition metal sulfides, catalyst activation temperature, use of activation gas, and synthesis methods.…”

Section: Decomposition Of Thiosaltsmentioning

confidence: 99%

“…The major drawbacks of the unsupported catalysts are typically low surface areas, lower dispersion of slabs and longer slab lengths. Therefore, in order to overcome these problems and improve the catalytic performance further, some research groups utilized organic surfactants [136] and alkyl containing precursors [131][132][133][134] (as the alkyl group acts as an internal template) that can improve the dispersion of the metal sulfide slabs and higher surface areas during the synthesis of catalysts. In that sense, Acuña et al synthesized tri-metallic catalysts (CoMoW) with various carbon chain lengths from C 1 to C 3 .…”

Section: Decomposition Of Thiosaltsmentioning

confidence: 99%

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Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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The literature from the past few years dealing with hydrodesulfurization catalysts to deeply remove the sulfur-containing compounds in fuels is reviewed in this communication. We focus on the typical transition metal sulfides (TMS) Ni/Co-promoted Mo, W-based bi- and tri-metallic catalysts for selective removal of sulfur from typical refractory compounds. This review is separated into three very specific topics of the catalysts to produce ultra-low sulfur diesel. The first issue is the supported catalysts; the second, the self-supported or unsupported catalysts and finally, a brief discussion about the theoretical studies. We also inspect some details about the effect of support, the use of organic and inorganic additives and aspects related to the preparation of unsupported catalysts. We discuss some hot topics and details of the unsupported catalyst preparation that could influence the sulfur removal capacity of specific systems. Parameters such as surface acidity, dispersion, morphological changes of the active phases, and the promotion effect are the common factors discussed in the vast majority of present-day research. We conclude from this review that hydrodesulfurization performance of TMS catalysts supported or unsupported may be improved by using new methodologies, both experimental and theoretical, to fulfill the societal needs of ultra-low sulfur fuels, which more stringent future regulations will require.

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Section: Decomposition Of Thiosaltsmentioning

confidence: 99%

Section: Decomposition Of Thiosaltsmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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“…Sulfides of metals, e.g., MoS 2 and WS 2 , have been used as the active phase in hydrocracking catalyst. NiMo and CoMo sulfides were identified to exhibit superior HDS activity [13,14].…”

Section: State Of Active Phasementioning

confidence: 99%

Catalysts for Hydroprocessing of Heavy Oils and Petroleum Residues

Tye¹

2019

Processing of Heavy Crude Oils - Challenges and Opportunities

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With the increasing demand of petroleum-derived products due to the world population and development, upgrading of crude oil with heavier quality and petroleum residues is unavoidable. Hydroprocessing is a preferable process for heavy oil upgrading. The process is operated with the presence of a catalyst, and catalysis plays an important role in the process. An overview regarding the catalyst design such as the catalyst active metal, active phase, support properties, and catalyst structure for heavy oil hydroprocessing is provided. There also include some recent advancements related to catalytic hydroprocessing of heavy oils and residue processes. Further catalyst performance improvement will likely come from catalyst optimization and better catalyst deactivation resistance resulting from metal poisoning and coke formation.

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“…However, there has been a growing interest in other, less conventional, methods of improving HDC as a process [17]. An overview of recent HDC studies can be found in Table S1 [18][19][20][21][22][23][24]. Additional reviews on HDC of heavy oils can be found elsewhere [17,[25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Hydrocracking of Athabasca Vacuum Residue Using Ni-Mo-Supported Drill Cuttings

2019

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Ni-Mo supported drill cuttings were used to catalyze the hydrocracking (HDC) of Athabasca vacuum residue (AVR) in an autoclave. Drill cuttings are a common waste product that are, depending on their origin, plentiful in acidic sites. The catalyst was prepared using the wet impregnation method. HDC was carried out at both low and high H2 pressure at 400 °C. Control thermal cracking (TC) and HDC runs with and without raw drill cuttings were performed to better examine the role of the supported drill cuttings catalyst. The quality in terms of viscosity and °API gravity, and the yield of various fractions making up the product oil were used to gauge the performance of the catalyst. Similar temperature and energy profiles between TC and HDC suggested strong overlap between the two different reactions, despite H2 presence. Nevertheless, supported drill cuttings runs at high H2 pressures promoted H2 consumption to a strong extent. Consequently, the liquid yield was the highest (~75 wt.%) and the coke yield was negligible. High temperature simulated distillation results revealed a residue conversion of ~55% for both low and high pressure HDC catalytic runs. The product oil quality with respect to viscosity and °API gravity was also found to be comparable between the low and high pressure HDC catalytic runs. Accordingly, no trade-off between liquid yield and quality was incurred at high H2 pressure. Effectively the supported drill cuttings drastically reduced coke formation, while maximizing the yield of the desired liquid product.

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Hydrocracking of vacuum residue using NiWS( x ) dispersed catalysts

Cited by 33 publications

References 48 publications

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Catalysts for Hydroprocessing of Heavy Oils and Petroleum Residues

Hydrocracking of Athabasca Vacuum Residue Using Ni-Mo-Supported Drill Cuttings

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