The desulfurization yield, with the use of 30% H 2 O 2 solution, of commercial light oil was 75% following 24 h of photo-irradiation and the sulfur content in the light oil was reduced from 0.2 wt% to less than 0.05 wt%. 145 In these studies, 143–145 desulfurization was basically done by photodecomposition of sulfur-containing compounds in ...
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Mitra et al. [9] synthesized V 2 O 5 /Al 2 O 3 and used it as a heterogeneous catalyst with cumene hydroperoxide (CHP) for desulfurization oil at 1 atmosphere. The oxidation process of sulfur compounds is shown in Fig. 10 a. This ODS process was economical due to recycling CHP about 80 %. CHP has the role of oxygen supply for the oxidation process.
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Petroleum coke desulfurization has been experimentally studied in this work using molten caustic leaching method. Several experiments have been carried out using different values of alkali to coke mass ratio, temperature, time and mesh size. In addition, Taguchi L9 design has been applied as a statistical tool to study the effects of alkali to ...
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The use of oxidative methods for petroleum coke desulfurization using oxygen as an oxidant was studied in [8, 9] as a preoxidation step followed by hydrogenation.It was found [] that up to 540°С sulfur compounds do not undergo noticeable transformations, and only prolonged treatment (for 5 h and more) of petroleum coke in a flow of an oxygen-containing …
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ABSTRACT: The survey of literature, consisting the estimation approaches for crude oil desulfurization has been reviwed. The se desulfurization approaches include oxidative …
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Adsorptive desulfurization involves the removal of organic sulfur compounds from petroleum fractions by physicochemical adsorption processes. This is a low temperature and pressure technique and does not need costly hydrogen. The efficiency of adsorptive desulfurization depends mostly on the adsorbent's textural properties.
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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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High-sulfur petroleum coke (HSPC), that is a by-product from slag oil in the coking process of refining, shows versatility values in practical applications and, however, concentrates the majority of organic sulfur. Herein, we design and construct a highly effective CTAB@HPA composites to be explored for the catalytic oxidative desulfurization of HSPC under mild …
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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 …
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Ferric chloride and benzene were examined with many other chemicals to be used as solvents for the sulfur-bearing compounds present in the Egyptian petroleum coke. The best results were obtained when ferric chloride and benzene were used consecutively, and more than 35% degree of desulfurization was obtained in this case.
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The sulfur in petroleum coke is harmful to carbon products, underscoring the importance of desulfurization for high-sulfur petroleum coke. This paper proposes a method combining alkaline catalytic roasting with ultrasonic oxidation for the deep desulfurization of high-sulfur petroleum coke. The results show that the desulfurization rate reaches 88.99% and the …
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Petroleum coke desulfurization methods include conventional roasting, intensified roasting, and the use of additives during the roasting process. Conventional roasting …
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Abstract— Because of the requirement for low sulfur content of fuel oils, it is necessary to develop alternative methods for desulfurization of petroleum fractions. Due to the disadvantages of …
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The desulfurization of petroleum coke under static conditions is a reaction of external diffusion control, while this process under dynamic conditions is a reaction of internal diffusion control ...
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technology which can selectively remove sulfur from petroleum fuels at ambient pressure and room temperature without adsorbing aromatics and olefins present in the fuel [11]. Because CFA can be used as starting material for the synthesis of valuable zeolites, adsorptive desulfurization using zeolites could thus offer an avenue of CFA valorization.
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This article is cited by 11 publications. Jiazhuang Tian, Qiuyun Mao, Zihan You, Qifan Zhong. Investigation of Petroleum Coke Gasification with CO2/H2O Mixtures and S/N Removal Mechanism via ReaxFF MD Simulation.
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The rising demand for transport fuel and strict environmental laws, as well as the increase in the amount of sulfur in crude oil due to improper extraction of oil, has led to more serious efforts and studies to find cost-effective methods of desulfurization [7], [8], [9], [10].The HDS is one of the most widely used and effective methods for removing sulfur from crude oil.
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Sulfur removal by solvent extraction on gas oil A. desulfurization at the higher solvent ratios, albeit at relatively low yields (cf. the results in Table 2). The relative desulfurization effectiveness of the three solvents can be more easily visualized by employing the effectiveness factor, K, defined as K = D/(IO0 -- Y ), where D is the ...
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Desulfurization: Removing the Impurities from Oil Refineries 1. Introduction to Desulfurization. Desulfurization is a crucial process in the refining of crude oil, and it is essential to remove impurities such as sulfur from the oil to produce high-quality fuels that meet regulatory standards.The process of desulfurization has been developed over the years as a result of …
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Due to the most recent environmental requirements, wide desulfurization has become an increasingly important way to obtain ultra-clean fuels for transportation of less than 15 ppmw of sulfur,...
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Fuels obtained through hydrodesulfurization scale back pollutant emissions in automotive vehicles, aircraft, trains, ships, gas or oil burning power plants, residential and industrial furnaces...
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The Catalytic Desulfurization (CDS) process is a key technology in the oil refining industry, which helps to remove sulfur-containing impurities from crude oil, feedstocks, and …
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In order to advance desulfurization technology, a new method for excellent oxidative desulfurization of fuel at room temperature will be of paramount importance. As a novel desulfurization method ...
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Abstract⎯The oxidative desulfurization of crude petroleum from the Maiorskoe field (Orenburg oblast, Rus-sia) with hydrogen peroxide in the presence of organi c and inorganic acids has been studied. A procedure for the recovery of oxidized sulfur-containing compounds from the petroleum by extracting the oxidation prod-
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A number of processes ranging from purely physical such as solvent extraction to thermal or chemical treatment using different agents including hydrocarbon gases, alkali metal compounds, and hydrogen have been proposed for petroleum coke desulfurization. The complexity of the sulfur-carbon bonds in coke, together with the extremely variable nature of the coke itself, …
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Traditionally, petroleum refinery adopts high temperature calcination desulfurization [11], [15], [16], [17], hydrodesulfurization and alkali metal assisted desulfurization for the removal of sulfur from HSPC [18]. Nevertheless, the high cost and high pollution seriously restrict the application of the above methods.
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ation. Desulfurization proceeds due to crude oil properties mainly high boiling range, high fluidity, high sulfur content and nat ure of sulfur content. Keywords: Desulfurization -crude oil Hydrodesulphurization (HDS) Microbe desulfurization Oxidative desulfurization (ODS) 1. INTRODUCTION Crude oil is a complex mixture consists of hydrocarbons as w
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desulfurization of crude oil is urgently needed so that the sulfur contents in petroleum product could be reduced from the root. The desulfurization methods including variations thereon that are discussed include hydro desulfurization, extractive desulfurization, oxidative desulfurization, bio desulfurization and desulfurization
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high-sulfur Egyptian petroleum coke, J. Inst. Fuel, Sept. 1976, pp. 139
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In recent times, catalytic ODS has been identified as one of the most suitable, effective, and sustainable technology for deep desulfurization. The development of new …
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Oxidative desulfurization (ODS) has emerged as a prominent technique for the removal of sulfur compounds from fuels, aiming to comply with stringent environmental …
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The most common oxidants in the processes of oxidative desulfurization of petroleum fractions are hydrogen peroxide and alkylhydroperoxides in combination with catalysts that provide high ...
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The effect of different calcination conditions on the desulfurization rate of high-sulfur petroleum coke was examined. In addition, the effects of iron roasting on petroleum coke were analyzed through a series of characterizations. Finally, the desulfurization mechanism was theoretically validated using density functional theory (DFT) calculations.
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