Jan 14, 2021 1. Introduction. 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
desulfurization of petroleum feedstocks. 1 CHAPTER ONE GENERAL INTRODUCTION Dissertation Organization This dissertation contains three papers in the format required for journal publication, describing the research I performed at Iowa State University. Preceding these papers is a
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Jan 29, 1999 Catalyst desulfurization of petroleum residua feedstocks 1986-03-18 Nongbri et al. 208/58 4508615 Multi-stage process for demetalation, desulfurization and dewaxing of petroleum oils 1985-04-02 Oleck et al. 208/89 4500424 Desulfurization catalyst and process 1985-02-19 Simpson et al. 208/216PP 4486297
Oct 08, 2020 Desulfurization of petroleum by Maurice William Ranney, 1975, Noyes Data Corp. edition, in English
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
Mar 01, 2012 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 that can be employed for desulfurization of heavy oils.
An Evaluation of Desulfurization Technologies for Sulfur Removal From Liquid Fuels - Free download as PDF File (.pdf), Text File (.txt) or read online for free. An evaluation of desulfurization technologies for sulfur removal from liquid fuels
Oct 18, 2021 Kuwait City, Oct 18 The National Petroleum Company (KNPC) announced that a fire had occurred in the ARDS Residual Oil Desulfurization Unit at Mina Al-Ahmadi Refinery. The company said in tweets via its Twitter account A fire broke out a short while ago in the ARDS desulfurization unit at the Mina Al-Ahmadi refinery, and the firefighting teams in the refinery
Jul 15, 2021 Straight-run diesel from the Chinese Academy of Petroleum Sciences was performed to real diesel desulfurization. The initial sulfur concentration determined by a sulfur and nitrogen analyzer was to be 10911 ppm and diluted it with n-hexadecane to 25 times (535 ppm) and 50 times (298 ppm).
Several microorganisms were found to desulfurize dibenzothiophene (DBT), a representative of the organic sulfur compounds in petroleum, forming a sulfur-free compound, 2-hydroxybiphenyl. They are promising as biocatalysts in the microbial desulfurization of petroleum because without assimilation of the carbon content, they remove only sulfur ...
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),
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 organic polymers are used.
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.
The technology and costs of crude oil desulfurization are also dis- cussed briefly, as well as processes to desulfurize the petroleum cokes. Hydrocracking is not covered in this report. To comply with the increasingly severe restrictions on allowable sulfur content of the fuel oils for the prevention of sulfur oxides emission in major urban areas of the world, the petroleum refiner
The term deep desulfurization refers to the removal of 90 to nearly 100% 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.
Jan 14, 2021 According to the data, it is speculated that among gasoline, kerosene, and diesel oil samples, the highest sulfur removal is attained in the case of gasoline, followed by diesel oil and kerosene oil. The highest desulfurization yield is also attained in the case of diesel oil by MnO2/MrGO catalysts.
to thermal or chemical treatment using different agents including hydrocarbon. gases, alkali metal compounds, and hydrogen have been proposed for petroleum. coke
In this regard, several new techniques for desulfurization of petroleum have been introduced, including extractive desulfurization, adsorptive desulfurization, desulfurization by polymer membranes, precipitative desulfurization, bio-desulfurization and oxidative desulfurization.
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.
Jun 01, 2019 Desulfurization by molten caustic leaching (MCL) at 400500 C has been investigated in order to reduce the sulfur content of petroleum coke.
Apr 20, 2021 Recently ultra-deep desulfurization of petroleum refinery products has received a prodigious deal of consideration (Shafiq et al., 2020, Shafiq et al., 2021). The effort is not only for stringent environmental legislation regarding transportation fuels but also for meeting the extreme demand of sulfur-free (1 ppm) liquid fuels for fuel cell applications and preventing the
articleosti_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
Jan 01, 1995 Apparatus and method for the desulfurization of petroleum by bacteria. Patent Lizama, H M Scott, T C Scott, C D. A method is described for treating petroleum with anaerobic microorganisms acting as biocatalysts that can remove sulfur atoms from hydrocarbon molecules, under anaerobic conditions, and then convert the sulfur atoms to hydrogen ...
Jan 04, 2016 The removal of sulfur compounds from liquid petroleum gas (LPG) was investigated using a fixed-bed flow sorption system. Copper-modified bentonite adsorbents significantly enhanced the desulfurization of LPG. Several factors that influence desulfurization, including the copper loading, the baking temperature, the v
Oxidative Desulfurization of Petroleum Distillate Fractions using Manganese Dioxide Supported on Magnetic Reduced Graphene Oxide as Catalyst Waqas Ahmad, Atiq Ur Rahman, Imtiaz Ahmad, Muhammad Yaseen, Badrul Mohamed Jan,
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 the Chemical Process Industry.
May 28, 1997 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 1.51 and at a molar ratio of sodium metal to unreacted
Desulfurization reactions were carried out using DBT and petroleum oils at 45C followed by different analytical procedures. RESULTS We report the isolation of a thermophilic bacterium Klebsiella sp. 13T from contaminated soils collected from petroleum refinery.
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 ...
Oxidative Desulfurization of Petroleum Distillate Fractions Using Manganese Dioxide Supported on Magnetic Reduced Graphene Oxide as Catalyst Nanomaterials (Basel) . 2021 Jan 1411(1)203. doi 10.3390/nano11010203.
Abstract A recyclable amphiphilic catalyst, which composed of peroxotungsten anion and quaternary ammonium cation assembled in the interface of the emulsion droplets, shows high selectivity and activity in the oxidation of sulfur-containing molecules to sulfones with hydrogen peroxide in diesel under mild reaction conditions. All the sulfur-containing molecules present in
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 ...
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.
The main hydrotreating reaction is that of desulfurization, but many others take place to a degree proportional to the severity of the operation. Typical reactions for this project are Figure 3. Sulfur forms present in petroleum fractions. The ease of desulfurization is dependent upon the type of compound. Lower-boiling