Removal of refractory organic sulfur compounds in fossil fuels using MOF sorbents

2013 ◽  
Vol 12 (3) ◽  
pp. 296-304
Keyword(s):  
Adsorption Capacity ◽  
Fossil Fuels ◽  
Activated Carbons ◽  
Metal Organic Framework ◽  
Sulfur Removal ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Invasive Approach ◽  
Organic Sulfur Compounds ◽  
Desulfurization Activity

The stringent new regulations to lower sulfur content in fossil fuels require new economic and efficient methods for desulfurization of recalcitrant organic sulfur. Hydrodesulfurization of such compounds is very costly and requires high operating temperature and pressure. Adsorption is a non-invasive approach that can specifically remove sulfur from refractory hydrocarbons under mild conditions and it can be potentially used in industrial desulfurization. Intensive research has been conducted in materials development to increase their desulfurization activity; however, even the highest activity obtained is still insufficient to fulfil the industrial requirements. To improve the adsorption capacity and sorbent regeneration, more work is needed in areas such as increasing specific desulfurization activity, hydrocarbon phase tolerance, sulfur removal at higher temperature, and development of new porous substrates for desulfurization of a broader range of sulfur compounds. This work comprehensively describes the adsorption of organo-sulfur compounds present in liquid fuels on metal-organic framework (MOF) compounds. It has been demonstrated that the extent of dibenzothiophene (DBT) adsorption at temperatures close to ambient (304 K) is much higher on MOF systems than on the benchmarked Y-type zeolite and activated carbons. In addition, the DBT adsorption capacity depends strongly on the MOF type as illustrated by the much higher extent of adsorption observed on the Cu-(C300) and Al-containing (A100) MOF systems than on the Fe-containing (F300) MOF counterpart.

scholarly journals Desulfurization of Dibenzothiophene and Diesel Oils by a Newly Isolated Gordona Strain, CYKS1

1998 ◽  
Vol 64 (6) ◽  
pp. 2327-2331 ◽  
Author(s):  
Sung-Keun Rhee ◽  
Je Hwan Chang ◽  
Yong Keun Chang ◽  
Ho Nam Chang
Keyword(s):  
Fossil Fuels ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Sulfur Source ◽  
Resting Cells ◽  
Organic Sulfur Compounds ◽  
4S Pathway ◽  
Light Gas Oil ◽  
Good Potential ◽  
Early Growth Phase

ABSTRACT A dibenzothiophene (DBT)-desulfurizing bacterial strain was isolated and identified as Gordona strain CYKS1. Strain CYKS1 was found to transform DBT to 2-hydroxybiphenyl via the 4S pathway and to be able to also use organic sulfur compounds other than DBT as a sole sulfur source. Its desulfurization activity was susceptible to sulfate repression. Active resting cells for desulfurization could be prepared only in the early growth phase. When two types of diesel oils, middle distillate unit feed (MDUF) and light gas oil (LGO) containing various organic sulfur compounds including DBT, were treated with resting cells of strain CYKS1 for 12 h, the total sulfur content significantly decreased, from 0.15% (wt/wt) to 0.06% (wt/wt) for MDUF and from 0.3% (wt/wt) to 0.25% (wt/wt) for LGO. The newly isolated strain CYKS1 is considered to have good potential for application in the biodesulfurization of fossil fuels.

Biodesulfurization of refractory organic sulfur compounds in fossil fuels

2007 ◽  
Vol 25 (6) ◽  
pp. 570-596 ◽  
Author(s):  
Mehran Soleimani ◽  
Amarjeet Bassi ◽  
Argyrios Margaritis
Keyword(s):  
Fossil Fuels ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds

scholarly journals Pollution status of volatile organic sulfur compounds causing odor in Xi River and factors influencing spatial distribution

2020 ◽  
Vol 20 (4) ◽  
pp. 1264-1270
Author(s):  
Xiang Tu ◽  
Shaohua Chen ◽  
Siyu Wang ◽  
Haiqing Liao ◽  
Xuejiao Deng
Keyword(s):  
Spatial Distribution ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Industrial Emissions ◽  
Diethyl Sulfide ◽  
Organic Sulfur Compounds ◽  
Factors Influencing ◽  
Pollution Status ◽  
Volatile Organic ◽  
Volatile Organic Sulfur Compounds

Abstract This study investigated the pollution status of volatile organic sulfur compounds (VOSCs) and the factors influencing their spatial distribution in the Xi River in Shenyang, China. A method for simultaneous determination of 14 VOSCs that cause odor in water samples was developed by using purge and trap coupled with gas chromatography and a flame photometric detector. The results indicated that each target compound could be identified from 15 sampling sites, and the total concentration of 14 VOSCs ranged from 2.575 to 52.981 μg L−1. Dimethyl sulfide (DMS) was the most important contaminant with an average concentration of 4.029 μg L−1, a detection rate of 93.33% and a variation coefficient of 0.72. The VOSCs were primarily distributed in suburban and rural sections, and the suburban section was the worst in regard to pollution by VOSCs. Dimethyl trisulfide was primarily distributed in urban and suburban sections of the Xi River due to industrial emissions. Ethanethiol, DMS, and ethyl methyl sulfide, which are typical by-products of microbial anaerobic decomposition from domestic wastewater, were found in abundance in the suburban section. Diethyl sulfide, diethyl disulfide, methyl propyl disulfide, and 1-propyl disulfide representing agricultural nonpoint source pollution were mostly distributed in the rural section.

ORGANIC SULFUR COMPOUNDS III. CONDENSATIONS INVOLVING o-NITROBENZENESULFENYL CHLORIDE

1966 ◽  
Vol 44 (17) ◽  
pp. 2105-2109 ◽  
Author(s):  
R. T. Coutts ◽  
K. W. Hindmarsh ◽  
N. J. Pound
Keyword(s):  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds

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