Desulfurization through ODS was proven with model and simulated petroleum feedstocks using oxidants such as hydrogen peroxide, tert-butyl hydroperoxide, and cumene peroxide . The model compounds used in ODS are mostly dibenzothiophene (DBT) …

Hydrodesulfurization. Desulfurization of fuels is commonly achieved by catalytic hydrodesulfurization (HDS), in which the organic sulfur species are converted to H 2 S and the corresponding hydrocarbon, as in the following reaction: R-SH + H 2 → R-H + H 2 S. Here R represents an alkyl group, such as methyl (CH 3 –), or ethyl (C 2 H 5 –). Figure 9.2 shows the type and relative reactivity ...

Desulfurization of petroleum streams containing condensed ring heterocyclic organosulfur compounds ... (HDS) of multiple condensed ring heterocyclic organosulftir compounds found in petroleum and petrochemical streams. HDS is preferably conducted in a mixed bed containing: (a) a Ni-based catalyst on an inorganic refractory support, and (b) a ...

Desulphurization of petroleum fractions by extraction with ionic solutions is an economic, simple and an efficient process. The sulfur contents of the kerosene, diesel oil, heavy residue and commercial furnace oil can be lowered upto 60, 71, 68 and 70 % respectively. The process has advantage of easy handling and use of less expensive reagents ...

Catalyst desulfurization of petroleum residua feedstocks: : Nongbri et al. 208/58: 4508615: Multi-stage process for demetalation, desulfurization and dewaxing of petroleum oils: : Oleck et al. 208/89: 4500424: Desulfurization catalyst and process: : Simpson et al. 208/216PP: 4486297

The term deep desulfurization refers to the removal of 90 to nearly of the sulfur contained in the petroleum fraction. This corresponds to an average product sulfur level of 25 ppm in naphthas, 0.1 wt% in gas oils, and 0.3 wt% in residual fuel oils. These low sulfur contents are dictated by increasingly stringent government regulations.

Petroleum Coke Desulfurization – LEHCO Process Engineering – Louis Herrington LEHCO Process Engineering, L.L.C. is a Chemical Process Consultancy for Petroleum Coke Desulfurization. Louis Herrington, P.E., Richard Crisp, and Associates offering Creative Assistance to …

In this study, oxidative desulfurization (ODS) of modeled and real oil samples was investigated using manganese-dioxide-supported, magnetic-reduced graphene oxide nanocomposite (MnO2/MrGO) as a catalyst in the presence of an H2O2/HCOOH oxidation system. MnO2/MrGO composite was synthesized and characterized by scanning electron microscope (SEM), energy dispersive X-ray …

the deep desulfurization of petroleum refinery end-products, nor has any resear ch work been conducted to investigate the potential of photocatalytic desulfurization technology for the …

microbial desulfurization of petroleum. A theoretical approach was pre­ sented for obtaining cultures capable of removing organically bound sulfur from petroleum fractions of high organic sulfur content. Soil and liquid enrichments were made using soil from a storage area for high sulfur petroleum fractions. The flora was enriched with a ...

Thus, petroleum desulfurization is a challenging task for the refiners under the current environmental regulations. Keeping in view this scenario, worldwide researchers are striving to develop new desulfurization techniques that are cost effective and more efficient than HDS. In this regard, several new techniques for desulfurization of ...

Desulfurization of petroleum coke process can be done in two ways, which are thermal desulfurization and hydrodesulphurization. This study aims to determine the effect of various grain size on sulfur, carbon, and chemical bond which contained by calcined petroleum coke. The raw material use calcined petroleum coke with 0.653% sulfur content.

Desulfurization is usually discussed in terms of sulfur removal from lighter refinery cuts, such as naphtha, distillate, and light vacuum gas oil fractions. The purpose of the present review paper is to provide an overview of the different conversion strategies …

Desulfurization of petroleum coke Download PDF Info Publication number US2716628A. US2716628A US195185A US19518550A US2716628A US 2716628 A US2716628 A US 2716628A US 195185 A US195185 A US 195185A US 19518550 A US19518550 A US 19518550A US 2716628 A US2716628 A US 2716628A Authority US United States Prior art keywords coke zone

(1999). Microbial Desulfurization of Organic Sulfur Compounds in Petroleum. Bioscience, Biotechnology, and Biochemistry: Vol. 63, No. 1, pp. 1-9.

Oxidative desulfurization (ODS) is currently enjoying popularity as a highly efficient and conveniently operating alternative or complementary to hydrodesulfurization (HDS) technique for resilient sulfur compounds removal from petroleum distillate fractions used as transportation fuels [1,2].The process is performed at ambient operating conditions in two steps, i.e., oxidation of sulfur ...

The fourteen contributions that make up the main body of the text cover petroleum desulfurization techniques, hydrodesulfurization for cleaner energy fuels, nanocomposities and hybrid materials for absorptive desulfurization, carbon-based nanomaterials for desulfurization, flue gas desulfurization, and a wide variety of other related subjects.

@article{osti_6242262, title = {Process for demetalation and desulfurization of petroleum oils}, author = {Fischer, R H and Milstein, D and Oleck, S M and Sherry, H S}, abstractNote = {This invention is concerned with removing metal and sulfur contaminants from residual oil fractions by catalytic contact with an improved catalyst comprising the oxides or sulfides of a group VIB metal and an ...

Investigation of the Desulfurization of Petroleum Distillates using Novel Ionic Liquids by Ramogohlo Eunice Sefoka A dissertation submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Masters of Science in Engineering. Johannesburg, 2016

Desulphurization of Petroleum Coke: A Review 1. A number of processes ranging from purely physical such as solvent extraction. to thermal or chemical treatment using different agents including ...

Published January 1969. This report is concerned with technology and costs for the desulfurization of petroleum stocks. Although the hydrodesulfurization of light and middle distillates such as gasoline, naphtha, kerosene, and gas oil is also evaluated, the emphasis here is on sulfur removal from the resid- ual fuel oil where there is a growing concern today because of air pollution.

Desulfurization reactions were carried out using DBT and petroleum oils at 45°C followed by different analytical procedures. RESULTS: We report the isolation of a thermophilic bacterium Klebsiella sp. 13T from contaminated soils collected from petroleum refinery.

What is claimed is: 1. A process for the desulfurization of a sulfur-containing petroleum feed, comprising: contacting said petroleum feed with sodium metal using staged addition at a temperature of from 325° to 400° C. in the presence of an effective molar excess of hydrogen to sodium metal of at least 1.5:1 and at a molar ratio of sodium metal to unreacted sulfur of up to 1:1 to ...

Thermal desulfurization (TDS) of petroleum coke during calcination is a well-known phenomenon which results in an increase in porosity and decrease in bulk density. Rain Carbon presented a paper recently which explored the potential of …

The invention discloses a process for the desulfurization of petroleum products by contacting with acidic organic polymers. Preferably, highly fluorinated and, most preferably, perfluorinated acidic polymers are used.

Alternative Petroleum Technologies, Inc. ("APT") announced that it has further refined its patent-pending and cost-saving Sulfex™ desulfurization processes for distillate fuels, leading to additional reduction in capital and operational expenditure, as well as lower required footprint.

Biocatalytic Desulfurization (BDS) represents an alternative approach to the reduction of sulfur in fossil fuels. The objective is to use bacteria to selectively remove sulfur from petroleum and middle distillate fractions, without the concomitant release of carbon.

Thus, petroleum desulfurization is a challenging task for the refiners under the current environmental regulations. Keeping in view this scenario, worldwide researchers are striving to develop new desulfurization techniques that are cost effective and more efficient than HDS. In this regard, several new techniques for desulfurization of ...

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Alkali desulfurization of petroleum coke is an important technology, can improve the performance of the final products of petroleum coke, while reducing air pollution. This paper studied the conditions for desulfurization of calcined petroleum coke using NaOH solid powders. The experimental results show that, the grain size in the range of experiment did not seem to influence desulphurization.

Results showed that NH 3 -reducing desulfurization could significantly remove sulfur in the coke, and the best operation temperature was approximately 800 °C, at which more than 80% of organic sulfur could be removed. The physical and chemical indicators of petroleum coke …

So, it is urgent to improve this method or find a better way to reduce the sulfur contents in petroleum products. Dry gas desulfurization method. According to the report, the first equipment in China for treating heavy crude oil through dry gas desulfurization method has been used in the No.3 joint oil gathering station at Tahe Oilfield of the ...

number of active sites contributed to the enhanced desulfurization. Thus, our results demonstrate that activated petroleum coke exhibits several favorable properties that make it a promising sorbent for acidic SO 2 in industrial flue gas desulfurization. Keywords: Petroleum coke, Activation, SO 2, Adsorption, Desulfurization 1 INTRODUCTION

They are promising as biocatalysts in the microbial desulfurization of petroleum because without assimilation of the carbon content, they remove only sulfur from the heterocyclic compounds which is refractory to conventional chemical desulfurization. Both enzymological and molecular genetic studies are now in progress for the purpose of ...

Desulfurization. a combination of physicochemical processes that promote the removal of sulfur from molten metal (cast iron, steel). It consists in converting the sulfur dissolved in the metal to sulfides that are either insoluble or poorly soluble in the liquid metal bath (for example, MnS, MgS, CaS, and Na 2S).