Deep catalytic desulphurization of heavy gas oil at mild operating conditions using self-functionalized nanoparticles as a novel catalyst

Sayed, Hussien A. El; Naggar, Ahmed M.A. El; Heakal, Bassem H.; Ahmed, Nour El-Din; Said, Sameh M.; Abdel‐Rahman, Adel A.‐H.

doi:10.1016/j.fuel.2017.07.038

Cited by 16 publications

(16 citation statements)

References 13 publications

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“…These peaks are indicative of the nanopowder of cobalt hydroxide. 15 Additional peaks appeared in the XRD patterns of both catalysts, which may be attributed to the presence of different phases, as previously stated. Mostly, these peaks are assigned to two phases: specifically, face-centered cubic (fcc) and hexagonal close packed (hcp).…”

Section: Resultssupporting

confidence: 71%

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New Approach for Catalytic Production of Ultralow-Sulfur Diesel Fuels Using Binary Composed Catalysts Consisting of Cobalt Nanoparticles

Naggar

Sayed

Salem

et al. 2020

Ind. Eng. Chem. Res.

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The global trend is orientated toward the production of diesel fuels composed of as low as 50 ppm (0.05 g/L) or even less sulfur compounds. As a result, the current study is orientated toward the generation of a diesel fuel with reduced sulfur content via the catalytic route. This research work introduces novel approaches in the catalytic desulfurization field through providing new perspectives. A special attention has been paid throughout this research toward the usage of advanced catalytic compositions in the sulfur removal application. Unlike the commonly known catalysts for the desulfurization processes that are basically metal oxides of different structures, catalysts with mixed structures are introduced in this study. Two novel cobalt catalysts based on metallic (zero-valent) and hydroxide structures were utilized to catalytically remove sulfur from the feedstock of the diesel fuel. The two catalysts were synthesized by the electroless deposition technique using two different reducers. The effect of these reducing agents on both the structure of the catalysts and their subsequent performance in the designated process was investigated. The diesel fuel manufactured in this study contains low content of sulfur; in addition to this, ultralow catalytic operational conditions had been other advances that have been concluded at the end of this work. Particularly, a temperature of 100 °C, liquid hour space velocity equals 1, and hydrogen-to-feed ratio of 100:1 were applied during the currently presented sulfur removal process. At these nonsevere conditions, approximately 90% of the sulfur compounds in original feedstock (10 000 ppm equivalent to 10 g/L) were eliminated at the generated diesel fraction in this research study. This sulfur removal rate was then elevated to reach 99.5% through an adsorption step using the spent catalyst, which had been acquired at the optimum conditions of the catalytic sulfur compounds’ removal process. Thus, the ultimate diesel fuel containing 50 ppm sulfur compounds was obtained by the presented treatment processes.

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Section: Resultssupporting

confidence: 71%

“…These components may be molecules of the reducing agents that could be strongly adsorbed onto the catalyst during the preparation procedure. 15 The full XRD data of both catalysts 1 and 2 including 2θ of the peaks, peak intensities, Co phases, and the line broadening at the full width at half-maximum (FWHM) intensity are given in Table 2.…”

Section: Resultsmentioning

confidence: 99%

New Approach for Catalytic Production of Ultralow-Sulfur Diesel Fuels Using Binary Composed Catalysts Consisting of Cobalt Nanoparticles

Naggar

Sayed

Salem

et al. 2020

Ind. Eng. Chem. Res.

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“… 1 The refining industry pays a lot of attention to separating these compounds from crude oil due to their adverse effects on the quality of the refined products and the negative impact on the environment, economy, and ecosystem. 2 The presence of nitrogen compounds in crude oil reduces the efficiency of the hydrodesulfurization (HDS) process via competitive adsorption of the catalyst. In addition, it also reduces the stability of the fuels, making it a challenge for safe storage and transportation.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Extraction of Sulfur and Nitrogen Compounds from Model Diesel Fuel Using Neoteric Green Solvents

et al. 2021

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Removal of nitrogen and sulfur compounds from diesel fuel is essential to comply with the increasing stringent regulations. The extraction capability of two deep eutectic solvents, namely, tetrabutylphosphoniumbromide/ethylene glycol, TBPBr/EG, with molar ratio 1:2, and tetrabutylammoniumbromide/ethylene glycol, TBABr/EG, with molar ratio 1:2, in simultaneously extracting basic nitrogen, nonbasic nitrogen, and sulfur compounds represented by pyridine, indoline, and dibenzothiophene (DBT) from n -hexadecane, was investigated. Two pseudo-ternary phase diagrams of (TBPBr/EG + (pyridine + indoline + DBT) + n -hexadecane) and (TBABr/EG + (pyridine + indoline + DBT) + n -hexadecane) were predicted via a conductor-like screening model for real solvents (COSMO-RS) and experimentally validated at 298.15 K and 1 atm. Both solvents showed zero cross-contamination, indicating the suitability of all solvents as extraction solvents. The tie lines obtained for both COSMO-RS and experiments were in agreement and had root-mean-square deviation (RMSD) values of less than 5% for both systems. Selectivity and distribution ratio calculated indicates the suitability of both solvents in extracting sulfur and nitrogen compounds from hexadecane. Two new parameters, namely, extraction efficiency, α, and extraction affinity, β, were introduced to ease the performance comparison of both solvents. TBPBr/EG shows a slightly better performance than TBABr/EG. Other than that, the presence of multiple solutes shows low effects on the performance of these solvents.

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“…Many studies have aimed at exploring highly dispersed metal catalysts. Several methods, such as deposition–precipitation, − equilibrium deposition filtration, − and chemical vapor deposition, and sonochemical, , have been developed. However, the well dispersed metal catalyst has a major drawback.…”

Section: Introductionmentioning

confidence: 99%

High Metal–Acid Balance and Selective Hydrogenation Activity Catalysts for Hydrocracking of 1-Methylnaphthalene to Benzene, Toluene, and Xylene

Chen

Yuan

et al. 2020

Ind. Eng. Chem. Res.

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Hydrocracking of 1-methylnaphthalene to benzene (B), toluene (T), and xylene (X) was performed over a series of bi-functional catalysts (W/Beta) at 420 °C and 6 MPa. The reaction results and kinetic study indicated that metal–acid balance (metal–acid interaction and metal–acid ratio) and metal dispersion had a great impact on the cracking, hydrogenation, and selective hydrogenation activity, which directly determine the BTX yield. An inappropriate metal–acid ratio would lead to producing plenty of intermediates or by-products, and poor metal dispersion would result in low hydrogenation activity. However, good metal dispersion usually accompanies the strong metal–acid interaction, which reduces the sulfidation of metal. In this work, a new tungsten precursor, W-complex, was used to prepare the catalysts with good dispersion of metal oxides and high hydrogenation activity. The external surface acidity of zeolite was modified to regulate the metal–acid interaction by forming a layer of SiO2 on acid sites through chemical liquid deposition.

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Deep catalytic desulphurization of heavy gas oil at mild operating conditions using self-functionalized nanoparticles as a novel catalyst

Cited by 16 publications

References 13 publications

New Approach for Catalytic Production of Ultralow-Sulfur Diesel Fuels Using Binary Composed Catalysts Consisting of Cobalt Nanoparticles

New Approach for Catalytic Production of Ultralow-Sulfur Diesel Fuels Using Binary Composed Catalysts Consisting of Cobalt Nanoparticles

Simultaneous Extraction of Sulfur and Nitrogen Compounds from Model Diesel Fuel Using Neoteric Green Solvents

High Metal–Acid Balance and Selective Hydrogenation Activity Catalysts for Hydrocracking of 1-Methylnaphthalene to Benzene, Toluene, and Xylene

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