New approach to active sites analysis of molybdenum-containing catalysts for hydrodesulfurization and hydrodenitrogenation based on inverse problem, fractal and site-type analyses

Nagai, Masatoshi; Nguyen, Thanh Tung; Adachi, Yasutaka; Kobayashi, Kentaro

doi:10.1016/j.cattod.2015.09.051

Cited by 12 publications

(6 citation statements)

References 56 publications

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“…Under such conditions, one of the promising alternative to HDS is the oxidative desulfurization (ODS) process, which has been studied intensively. In comparison to HDS, the operating conditions of ODS are more moderate (with atmospheric pressure and temperature lower than 100 °C), and no hydrogen is necessary, whereby S-containing compounds are oxidized to sulfones and sulfoxides, which are eliminated in the subsequent extraction process. − Previous studies showed that the combination of oxidative desulfurization (ODS) and extractive desulfurization (EDS) [extractive–oxidative desulfurization (EODS)] makes desulfurization more efficient than ODS and EDS. − …”

Section: Introductionmentioning

confidence: 99%

Desulfurization of Fuel by Extraction and Catalytic Oxidation Using a Vanadium Substituted Dawson-Type Emulsion Catalyst

Banisharif

Dehghani

Capel-Sanchez

et al. 2017

Ind. Eng. Chem. Res.

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A vanadium-substituted Dawson-type polyoxometalate [cetronium] 11 P 2 W 13 V 5 O 62 was fabricated to use in the extractive−catalytic oxidative desulfurization (ECODS) of fuels using hydrogen peroxide and ionic liquids (ILs), ethylene glycol, and a deep eutectic solvent. Taguchi robust was utilized to investigate the effects of operation parameters including H 2 O 2 dosage, type of solvent, solvent-to-oil volume ratio, temperature, and contact time. The results demonstrated that the highest level of desulfurization could be achieved using a volume ratio of IL to oil = 1:6, O/(S + N) mole ratio = 4, and temperature = 70 °C after 45 min. The combination of the extraction and catalytic oxidation process showed that the step-by-step system (extraction in series with ECODS) was much better than the one-pot system (ECODS in one pot), which can remove 90% sulfur from 500 ppmw fuel and 87% sulfur from 1500 ppmw fuel under optimized conditions. The best system could also be reused 7 times in a 500 ppmw model fuel desulfurization and 4 times in a 1500 ppmw model fuel desulfurization.

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Section: Introductionmentioning

confidence: 99%

Desulfurization of Fuel by Extraction and Catalytic Oxidation Using a Vanadium Substituted Dawson-Type Emulsion Catalyst

Banisharif

Dehghani

Capel-Sanchez

et al. 2017

Ind. Eng. Chem. Res.

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“…4 It is showed that the combination of ODS and extraction gets desulfurization more efficient. 5 Our previous works show the sulfur content of diesel can be reduced to be lower than 50 ppm. 6,7 Due to a short reaction time, at ambient conditions and high efficiency, ODS combined with extraction has been regarded as the most promising to obtain ultra clean fuels.…”

Section: Introductionmentioning

confidence: 97%

Deep oxidative desulfurization catalyzed by (NH₄)_xH_4−xPMo₁₁VO₄₀(x = 1, 2, 3, 4) using O₂as an oxidant

Liao

Geng

et al. 2017

RSC Adv.

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“…However, recently transition metal nitrides and carbides (especially molybdenum and tungsten carbides and nitrides) have attracted increasing attention of researchers due to their promising potential as catalysts for use in commercial hydroprocessing and other reactions. For example, in addition to HDN and HDS [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], their activity has been extensively studied in other processes, i.e., hydrogenolysis, isomerization, aromatization, hydrogenation/dehydrogenation [24][25][26][27][28][29], hydrodechlorination [30,31], water gas shift (WGS) and steam reforming [32][33][34][35], hydrodeoxygenation (HDO) of bio-oils [36][37][38][39][40][41], methanation reaction and hydrogen production [42,43], as well as ring-opening [44].…”

Section: Introductionmentioning

confidence: 99%

On Catalytic Behavior of Bulk Mo2C in the Hydrodenitrogenation of Indole over a Wide Range of Conversion Thereof

et al. 2020

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The catalytic activity of bulk molybdenum carbide (Mo2C) in the hydrodenitrogenation (HDN) of indole was studied. The catalyst was synthesized using a temperature-programmed reaction of the respective oxide precursor (MoO3) with the carburizing gas mixture of 10 vol.\% CH4/H2. The resultant material was characterized using X-ray diffraction, CO chemisorption, and nitrogen adsorption. The catalytic activity was studied in the HDN of indole over a wide range of conversion thereof and in the presence of a low amount of sulfur (50 ppm), which was used to simulate the processing of real petroleum intermediates. The molybdenum carbide has shown high activity under the tested operating conditions. Apparently, the bulk molybdenum carbide turned out to be selective towards the formation of aromatic products such as ethylbenzene, toluene, and benzene. The main products of HDN were ethylbenzene and ethylcyclohexane. After 99% conversion of indole HDN was reached (i.e., lack of N-containing compounds in the products was observed), the hydrogenation of ethylbenzene to ethylcyclohexane took place. Thus, the catalytic behavior of bulk molybdenum carbide for the HDN of indole is completely different compared to previously studied sulfide-based systems.

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New approach to active sites analysis of molybdenum-containing catalysts for hydrodesulfurization and hydrodenitrogenation based on inverse problem, fractal and site-type analyses

Cited by 12 publications

References 56 publications

Desulfurization of Fuel by Extraction and Catalytic Oxidation Using a Vanadium Substituted Dawson-Type Emulsion Catalyst

Desulfurization of Fuel by Extraction and Catalytic Oxidation Using a Vanadium Substituted Dawson-Type Emulsion Catalyst

Deep oxidative desulfurization catalyzed by (NH₄)_xH_4−xPMo₁₁VO₄₀(x = 1, 2, 3, 4) using O₂as an oxidant

On Catalytic Behavior of Bulk Mo2C in the Hydrodenitrogenation of Indole over a Wide Range of Conversion Thereof

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New approach to active sites analysis of molybdenum-containing catalysts for hydrodesulfurization and hydrodenitrogenation based on inverse problem, fractal and site-type analyses

Cited by 12 publications

References 56 publications

Desulfurization of Fuel by Extraction and Catalytic Oxidation Using a Vanadium Substituted Dawson-Type Emulsion Catalyst

Desulfurization of Fuel by Extraction and Catalytic Oxidation Using a Vanadium Substituted Dawson-Type Emulsion Catalyst

Deep oxidative desulfurization catalyzed by (NH4)xH4−xPMo11VO40(x = 1, 2, 3, 4) using O2as an oxidant

On Catalytic Behavior of Bulk Mo2C in the Hydrodenitrogenation of Indole over a Wide Range of Conversion Thereof

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Deep oxidative desulfurization catalyzed by (NH₄)_xH_4−xPMo₁₁VO₄₀(x = 1, 2, 3, 4) using O₂as an oxidant