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 ...Web

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 …Web

Extractive desulfurization of fuel oil using alkylimidazole and its mixture with dialkylphosphate ionic liquids. Industrial & engineering chemistry research, 46 ...Web

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 ...Web

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 wWeb

One of the favorable approaches in the desulfurization of diesel oil, and the focus of the studies at present, is oxidative desulfurization . This is due to its high efficiency, high selectivity, cost-effectiveness, operation om moderate conditions, usually at low temperature (less than 100 °C) and atmospheric pressure, and its high ...Web

Upgrading of Syrian petroleum coke by pre-oxidation. Hassan Al-haj Ibrahim. Engineering, Chemistry. 2011. Solvent extraction offers a simple but generally ineffective approach to the desulphurization of high-sulphur petroleum coke where the organic sulphur compounds present may be selectively dissolved.…. Expand.Web

The desulfurization of four petroleum distillates i.e. kerosene, light gas oil (LGO), heavy gas oil (HGO) and light cycle oil (LCO), with sulfur content 0.206–1.272% …Web

Introduction. The crude liquid fuels contain various thiophenics including thiophene (Th), benzothiophene (BT), dibenzothiophene (DBT) and their derivatives resulting in hazardous SO x emission harming the environment and catalyst poisoning to rust refinery equipment in the petroleum industry. Accordingly, numerous nations have …Web

Activity up to 100 μM/g dry cell weights is needed to meet the current demand for desulfurization. The present review describes the desulfurization capability of various microorganisms acting on ...Web

Abstract. Desulfurization by molten caustic leaching (MCL) at 400–500 °C has been investigated in order to reduce the sulfur content of petroleum coke. Effective parameters on desulfurization of petroleum coke, other than temperature, include alkali to feed (petroleum coke) mass ratio, time and mesh size in the ranges of 0.5–1.5, 1–3 h ...Web

In order to study the desulfurization of diesel oils obtained from an oil refinery, resting cells studies by Pseudomonas aeruginosa were carried out which showed a decrease of about 30% and 70.54% ...Web

Reliance on crude oil remains high while the transition to green and renewable sources of fuel is still slow. Developing and strengthening strategies for reducing sulfur emissions from crude oil is therefore imperative and makes it possible to sustainably meet stringent regulatory sulfur level legislations in end-user liquid fuels (mostly less than …Web

The results showed that vacuum was more favorable for the pyrolysis of organic sulfur in petroleum coke at high temperatures (>1400 °C) compared with argon. Vacuum-assisted alkali roasting desulfurization can reduced the sulfur content of petroleum coke to 0.18%, and the desulfurization rate can reached 98.54% at 1600 °C.Web

The extractive desulfurization has been found to be one of the most effective way for desulfurization of the liquid fuels. The major aspects which affects the desulfurization are the temperature, oil-IL/DES mass ratio, extraction time, initial S Content, mutual solubilities, multiple cycles and regeneration of the used solvents in the …Web

Direct application of high-sulfur fuels and ores can cause environmental pollution (such as air pollution and acid rain) and, in serious cases, endanger human health and contribute to property damage. In the background of preserving the environment, microbial desulfurization technologies for high-sulfur fuels and ores are rapidly …Web

One of the common industrial desulfurization approaches in petroleum refineries is hydro-desulfurization (HDS), nevertheless HDS technique is expensive, needs high temperatures and pressures, and ...Web

desulfurization capacity obtained was in the order: CS-ACA > PUPW-ACA > PC-ACA > AT-ACA. Under the optimal conditions of 30 C and 30 min contact time, the desulfurization rate of 0.5 g PUPW-ACA can reach about 98%. The HHV of non-condensable gas generated during the experiment was calculated, and the HHV of the pyrolysis oil was …Web

Desulfurization of fuels is a critical process in oil refining due to the destructive effects of sulfur compounds on human health and the environment. Naphtha is an important middle …Web

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 …Web

The accepted method for reducing the sulfur that is contained in petroleum derived fuels is catalytic hydrodesulfurization (HDS), which removes sulfur from the fuel …Web

The results showed that vacuum was more favorable for the pyrolysis of organic sulfur in petroleum coke at high temperatures (>1400 °C) compared with argon. Vacuum-assisted alkali roasting desulfurization can reduced the sulfur content of petroleum coke to 0.18%, and the desulfurization rate can reached 98.54% at 1600 °C.Web

To reduce the environmental impact of petroleum energy, the desulfurization of fuels is necessary. Metal– organic frameworks (MOFs), an emerging …Web

The approach with the best chance of leading to a breakthrough in desulfurization of heavy oil is autoxidation followed by …Web

Studies on the Desulfurization of Petroleum Coke by Organorefining and Other Chemical and Biochemical Techniques Under Milder Ambient Pressure Conditions. Abstract Petroleum coke (petcoke) is an inexpensive potential fuel. However, its use has been limited because of the low volatile content and high sulfur contents.Web

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 …Web

Several breakthroughs have been achieved in the development of an efficient catalyst for deep aerobic desulfurization techniques to address the sulfur-free …Web

Desulfurization of undiluted OB oil was performed with 1 ml of OB oil per liter of culture, which provided approximately 20 mg of organic sulfur (final concentration, 20 ppm). To minimize the degradation by ECRD-1 of alkanes present in the OB oil, desulfurization experiments were also performed with OB oil diluted in decane. ...Web

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 …Web

More research progress in the applications of various desulfurization technologies of fuel oil in the last ten years is represented in Fig. 2. The published data were generated from the web of science using the search keyword "desulfurization of fuel oil". Download : Download high-res image (170KB) Download : Download full-size image; Fig. 2.Web

oil desulfurization specifically. Sulfur in crude oil Sulfur is the most abundant element in petroleum after carbon and hydrogen. The average sulfur content varies from 0.03 to 7.89 mass% in crude oil (Mehran et al. 2007). The sulfur compounds can …Web

It illustrates all the possible processes to lower the sulfur contents in petroleum and its fractions to decrease emissions of sulfur oxides. This book introduces you to desulfurization concepts, including …Web