scholarly journals Deep Desulfurization of Extensively Hydrodesulfurized Middle Distillate Oil by Rhodococcus sp. Strain ECRD-1

2001 ◽  
Vol 67 (4) ◽  
pp. 1949-1952 ◽  
Author(s):  
M. J. Grossman ◽  
M. K. Lee ◽  
R. C. Prince ◽  
V. Minak-Bernero ◽  
G. N. George ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Middle Distillate ◽  
Deep Desulfurization ◽  
Sulfur Level ◽  
Rhodococcus Sp

ABSTRACT Dibenzothiophene (DBT), and in particular substituted DBTs, are resistant to hydrodesulfurization (HDS) and can persist in fuels even after aggressive HDS treatment. Treatment by Rhodococcussp. strain ECRD-1 of a middle distillate oil whose sulfur content was virtually all substituted DBTs produced extensive desulfurization and a sulfur level of 56 ppm.

Removal of Sulfur from MTBE by Pervaporation Process

2014 ◽  
Vol 521 ◽  
pp. 617-620 ◽  
Author(s):  
Hui Xia Lu ◽  
Shao Feng Bu ◽  
Zhong Ping Wang
Keyword(s):  
Sulfur Content ◽  
Pdms Membrane ◽  
Environmental Legislation ◽  
Membrane Materials ◽  
Operation Temperature ◽  
Adsorption Capacities ◽  
Deep Desulfurization ◽  
Adsorption Amount

With fog and haze increasingly severe pollution and tighter environmental legislation in China. It is urgent for refinery to reduce sulfur content in MTBE and produce cleaner fuels by deep desulfurization technology. The feasibility of pervaporation (PV) process for removal of sulfur from MTBE was investigated in this study. Adsorption capacities of three different membrane materials such as PDMS, naffion membrane with H and Na forms were compared by immersion tests. PDMS membrane showed better adsorption abilities for MTBE and disulfide. In addition, the adsorption of PDMS membrane in pure MTBE and dimethyldisulfide solution were investigated at 308.15K and 313.15K. It was indicated that increasing operation temperature facilitated to increase the adsorption amount and decrease the time for reaching adsorption equilibration. This research has guiding significance for removal of sulfur from MTBE by PV process.

Deep Desulfurization of Diesel Fuel Oxidized with TBHP Coupled with Solvent Extraction Intensified by Ultrasound

2014 ◽  
Vol 910 ◽  
pp. 57-60
Author(s):  
Guo Xian Yu ◽  
Qian Zhong ◽  
Mei Jin ◽  
Jin Huang Wang ◽  
Ping Lu
Keyword(s):  
Solvent Extraction ◽  
Sulfur Content ◽  
Process Parameters ◽  
Diesel Fuel ◽  
Sodium Tungstate ◽  
Oxidative Desulfurization ◽  
Ultrasound Irradiation ◽  
Molar Ratio ◽  
Deep Desulfurization ◽  
Hydrotreated Diesel

Deep desulfurization of a hydrotreated diesel fuel was investigated with TBHP oxidation coupled with solvent extraction intensified by ultrasound. The process parameters for the oxidation desulfurization of diesel fuel, such as the type and dosage of catalyst, co-solvent, ultrasound time, molar ratio of TBHP and sulfur were investigated. The results showed that sulfur content of the hydrotreated diesel fuel was reduced from 140 ppm to 12 ppm with using 1%wt of sodium tungstate as catalyst, 20%wt of methanol as co-solvent during the reaction, reaction temperature at 90°C, ultrasound time for 15 min and TBHP/Sulfur molar ratio of 32, and ultrasound irradiation had the obvious reinforcement in oxidative desulfurization of diesel fuel.

Deep Desulfurization of Diesel Fuel Oxidized with H2O2 Coupled with Solvent Extraction Intensified by Ultrasound

2014 ◽  
Vol 953-954 ◽  
pp. 1135-1138 ◽  
Author(s):  
Guo Xian Yu ◽  
Qian Zhong ◽  
Mei Jin ◽  
Jin Huang Wang ◽  
Ping Lu
Keyword(s):  
Solvent Extraction ◽  
Sulfur Content ◽  
Process Parameters ◽  
Diesel Fuel ◽  
Phosphotungstic Acid ◽  
Oxidative Desulfurization ◽  
Ultrasound Irradiation ◽  
Molar Ratio ◽  
Deep Desulfurization ◽  
Hydrotreated Diesel

Deep desulfurization of a hydrotreated diesel fuel was investigated with H2O2oxidation coupled with solvent extraction intensified by ultrasound. The process parameters for the oxidation desulfurization of diesel fuel, such as the type and dosage of catalyst, co-solvent, ultrasound time, molar ratio of H2O2and sulfur were investigated. The results showed that sulfur content of the hydrotreated diesel fuel was reduced from 140 ppm to 10 ppm with using 2%wt of phosphotungstic acid as catalyst, 20%wt of methanol as co-solvent during the reaction, reaction temperature at 90°C, ultrasound time for 10 min and H2O2/S molar ratio of 16, and ultrasound irradiation had the obvious reinforcement in oxidative desulfurization of diesel fuel.

scholarly journals A numerical analysis as a good tool for a prediction of final sulphur steel ladle content

10.30544/76 ◽  
2015 ◽  
Vol 21 (3) ◽  
pp. 143-154
Author(s):  
Z. Slović ◽  
Lj. Nedeljković ◽  
K. Raić ◽  
S. Dević
Keyword(s):  
Sulfur Content ◽  
Material Balance ◽  
Steel Ladle ◽  
Low Carbon ◽  
Good Tool ◽  
Vacuum Degassing ◽  
Slag Chemistry ◽  
Sulfur Level ◽  
Sulfur Capacity ◽  
Slag Weight

This work presents the industrial results of sulfur level prediction at the end of vacuum degassing (VD) of low carbon Al-Si killed steels. The effect of plant conditions, such as slag chemistry, temperature, oxygen levels of the molten steel, and slag weight on desulphurization was investigated based on the measured results and thermodynamic calculations. The variables which influence steel desulfurization such as the sulfur capacity, the initial sulfur content, and the amount of ladle slag at the end of the VD process are also defined. The desulfurization procedure was numerically analyzed using the results of 31 heats under real plant conditions in which the measured final sulfur content had been reduced to less than of 10 ppm. A method for prediction of the slag amount based on the material balance of sulfur and aluminum is also presented. The values of the sulfur capacity were determined according to the well-known KTH and optical basicity based models. The obtained results of the regression equation show a predictive final sulfur level ability of R=0.911. This was proved as satisfactory.

Removal of Thiophene from Simulated Oil by Catalytic Oxidation Using K2FeO4/ V2O5

2011 ◽  
Vol 183-185 ◽  
pp. 1568-1572
Author(s):  
Yan Xiu Liu ◽  
Hua Song
Keyword(s):  
Reaction Time ◽  
Catalytic Oxidation ◽  
Sulfur Content ◽  
Reaction Temperature ◽  
Temperature Reaction ◽  
Optimal Conditions ◽  
Catalyst Amount ◽  
Deep Desulfurization

Oxidation extraction of thiophene from simulated oil by using K2FeO4as oxidant and methanol as extractant has been investigated. The effects of different catalyst, oxidant amount, catalyst amount, reaction temperature, reaction time, and extraction conditions were studied. This process is capable of decreasing the sulfur content of simulated oil from 100 mg•L-1to 17.8 mg•L-1at the optimal conditions. The results indicate that such a process could be an alternative to common hydrodesulfurization for deep desulfurization.

Biofuels as a Means of Improving the Quality of Petroleum Middle Distillate Fuels

2001 ◽  
Vol 23 (7) ◽  
pp. 649-655 ◽  
Author(s):  
George W. Mushrush ◽  
Douglas G. Mose ◽  
Claudia L. Wray ◽  
Karen T. Sullivan
Keyword(s):  
Middle Distillate ◽  
Middle Distillate Fuels

Influence of technology parameters of free-cutting steel continuous casting on the billet internal structure

2020 ◽  
Vol 76 (2) ◽  
pp. 139-142
Author(s):  
A. T. Kunakbaeva ◽  
A. M. Stolyarov ◽  
M. V. Potapova
Keyword(s):  
Regression Analysis ◽  
Continuous Casting ◽  
Internal Structure ◽  
Sulfur Content ◽  
Manganese Content ◽  
High Quality ◽  
Correlation And Regression Analysis ◽  
Cutting Steel ◽  
Continuously Cast

Free-cutting steel gains specific working properties thanks to the high content of sulfur and phosphorus. These elements, especially sulfur, have a rather high tendency to segregation. Therefore, segregation defects in free-cutting steel continuously cast billets can be significantly developed. The aim of the work was to study the influence of the chemical composition of freecutting steel and casting technological parameters on the quality of the macrostructure of continuously cast billets. A metallographic assessment of the internal structure of cast metal made of free-cutting steel and data processing by application of correlation and regression analysis were the research methods. The array of production data of 43 heats of free-cutting steel of grade A12 was studied. Steel casting on a five-strand radial type continuous casting machine was carried out by various methods of metal pouring from tundish into the molds. Metal of 19 heats was poured with an open stream, and 24 heats – by a closed stream through submerged nozzles with a vertical hole. High-quality billets had a cross-sectional size of 150×150 mm. The macrostructure of high-quality square billets made of free-cutting steel of A12 grade is characterized by the presence of central porosity, axial segregation and peripheral point contamination, the degree of development of which was in the range from 1.5 to 2.0 points, segregation cracks and strips – about 1.0 points. In the course of casting with an open stream, almost all of these defects are more developed comparing with the casting by a closed stream. As a result of correlation and regression analysis, linear dependences of the development degree of segregation cracks and strips both axial and angular on the sulfur content in steel and on the ratio of manganese content to sulfur content were established. The degree of these defects development increases with growing of sulfur content in steel of A12 grade. These defects had especially strong development when sulfur content in steel was of more than 0.10%. To improve the quality of cast metal, it is necessary to have the ratio of the manganese content to the sulfur content in the metal more than eight.

Exemplar Abstract for Rhodococcus sp. None 2015.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Dorothea Taylor ◽  
George M Garrity
Keyword(s):  
Rhodococcus Sp

Exemplar Abstract for Rhodococcus sp. None 2015.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Dorothea Taylor ◽  
George M Garrity
Keyword(s):  
Rhodococcus Sp

Engine Performance with Diesel-Biodiesel Blends Fuel and Emission Characteristics

2020 ◽  
Vol 38 (5A) ◽  
pp. 779-788
Author(s):  
Marwa N. Kareem ◽  
Adel M. Salih
Keyword(s):  
Sulfur Content ◽  
Diesel Fuel ◽  
Engine Performance ◽  
Esterification Reaction ◽  
Biodiesel Fuel ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Biodiesel Blends ◽  
Fuel Blends ◽  
Hc Emissions

In this study, the sunflowers oil was utilized as for producing biodiesel via a chemical operation, which is called trans-esterification reaction. Iraqi diesel fuel suffers from high sulfur content, which makes it one of the worst fuels in the world. This study is an attempt to improve the fuel specifications by reducing the sulfur content of the addition of biodiesel fuel to diesel where this fuel is free of sulfur and has a thermal energy that approaches to diesel.20%, 30% and 50% of Biodiesel fuel were added to the conventional diesel. Performance tests and pollutants of a four-stroke single-cylinder diesel engine were performed. The results indicated that the brake thermal efficiency a decreased by (4%, 16%, and 22%) for the B20, B30 and B50, respectively. The increase in specific fuel consumption was (60%, 33%, and 11%) for the B50, B30, and B20 fuels, respectively for the used fuel blends compared to neat diesel fuel. The engine exhaust gas emissions measures manifested a decreased of CO and HC were CO decreased by (13%), (39%) and (52%), and the HC emissions were lower by (6.3%), (32%), and (46%) for B20, B30 and B50 respectively, compared to diesel fuel. The reduction of exhaust gas temperature was (7%), (14%), and (32%) for B20, B30 and B50 respectively. The NOx emission increased with the increase in biodiesel blends ratio. For B50, the raise was (29.5%) in comparison with diesel fuel while for B30 and B20, the raise in the emissions of NOx was (18%) and...

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