Ethylenediamine-Assisted Solvent Extraction of Coal in <i>N</i>-Methyl-2-pyrrolidone:  Synergistic Effect of Ethylenediamine on Extraction of Coal in <i>N</i>-Methyl-2-pyrrolidone

Pande, Shailaja; Sharma, D. K.

doi:10.1021/ef0001742

Cited by 43 publications

(40 citation statements)

References 48 publications

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“…Research work in the authors' laboratory had been extended on organorefining of coals and lignites to obtain superclean coal having ultra low ash contents (less than 1%; Pande and Sharma, 2002). Research was also performed on the organodesulfurization of coals and lignites (Das and Sharma, 2001).…”

Section: Resultsmentioning

confidence: 99%

“…Solvent extraction of coal resulted in the removal of organic sulfur from coals and lignites and, in fact, Bhatia (2007) reported the use of an organorefining technique using NMP containing a small amount of EDA; that is, an e, N solvent system to remove organic sulfur from coal. Since e, N solvent system was found to be a potential solvent for not only organorefining (Pande and Sharma, 2002) but also for the organodesulfurization of coals and lignites, in the present work the use of this potential solvent system was also extended on the organodesulfurization of petcoke.…”

Section: Resultsmentioning

confidence: 99%

“…The petcoke-to-solvent ratio was kept at 1:17 (wt/vol; Pande and Sharma, 2002). In the NMP containing a small amount of EDA (e, N) system, a petcoke-to-EDA ratio of 1:1 (wt/vol) and petcoke-to-NMP ratio 1:17 (wt/vol) was used (Pande and Sharma, 2002). The mixtures in the flask were refluxed for different time intervals (2 to 24 hr) and then filtered.…”

Section: Solvent Extraction (Organorefining) Of Petcokementioning

confidence: 99%

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Studies on the Desulfurization of Petroleum Coke by Organorefining and Other Chemical and Biochemical Techniques Under Milder Ambient Pressure Conditions

Agarwal

Sharma

2011

Petroleum Science and Technology

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Petroleum coke (petcoke) is an inexpensive potential fuel. However, its use has been limited because of the low volatile content and high sulfur contents. Moreover, research work has been extended for reducing the sulfur contents in petcoke. However, there is still no commercially established process of desulfurization of petcoke. Studies have been extended on the desulfurization of two petcoke samples. Interesting results were obtained by employing the techniques such as organorefining; that is, solvent extraction using N-methyl-2-pyrrolidone containing small amounts of ethylenediamine, morpholine, ethylenediamine, and other solvents. Acids and alkalis were also used for the desulfurization of petcoke. Biodesulfurization using Pantoea agglomerans D23W3 and Acidithiobacillus ferrooxidans showed interesting results. The present work also resulted in the development of some integrated processes of desulfurization of petcoke.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Solvent Extraction (Organorefining) Of Petcokementioning

confidence: 99%

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Studies on the Desulfurization of Petroleum Coke by Organorefining and Other Chemical and Biochemical Techniques Under Milder Ambient Pressure Conditions

Agarwal

Sharma

2011

Petroleum Science and Technology

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“…Dosodia et al subjected to chemical cleaning using aqueous NaOH treatment followed by H 2 SO 4 leaching using the procedure reported by Sharma and Gihar (27). Organo-refining of Pasang coal was performed using N-methyl-2-pyrrolidone (NMP) containing a small amount of ethylenediamine following the procedure reported by Pande and Sharma (28) and super clean coal (SCC) was recovered by precipitation and washing. All the coal samples were carbonized at 1000uC.…”

Section: Methodsmentioning

confidence: 99%

Development of Catalyst Free Carbon Nanotubes from Coal and Waste Plastics

Dosodia

Lal

Singh

et al. 2009

Fullerenes, Nanotubes and Carbon Nanostructures

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DC-Arc technique has been used to synthesize carbon nanotubes from super clean coal, chemically cleaned coal, original coal and waste plastics instead of using high purity graphite in the presence of metal catalysts. The results obtained are compared in terms of yield, purity and type of carbon nanotubes produced from different types of raw material used. In the present study different types of raw materials have been prepared i.e. chemically cleaned coal and super clean coal, and the carbon nanotubes have been synthesized by DC Arc discharge method. Taking in account the present need of utilizing coal as a cheaper raw material for bulk production of carbon nanotubes and utilization of waste plastics (which itself is a potential environmental threat) for production of such an advance material the present work was undertaken. Since the process does not involve presence of any kind of metal catalyst, it avoids the cost intensive process of removal of these metal particles. The residual coal obtained after refining has major fuel potential and can be utilized for various purposes.

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“…Both the techniques of refining coal (i.e., inorgano-leaching) (Sharma and Gihar, 1991;Sharma and Singh, 1995a;Nabeel et al, 2009) using alkali-acid or acid alone as well as organo-refining (Sharma and Mishra, 1989;Mishra and Sharma, 1990;Sharma and Singh, 1996;Pande and Sharma, 2002) using common coal-derived and industrial organic solvents have been studied extensively by the research groups of the author.…”

Section: Introductionmentioning

confidence: 99%

The Steam Gasification of Coal under Milder Low Temperature Conditions—Nonisothermal Kinetics Studies for Reactor Design

Sharma

Singh

Mathew

2010

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Advanced systems of power generation, such as integrated gasification combined cycle power generation, are being demonstrated as the next generation of clean coal technology. It is important commercially to exploit the coal in such a way that premium and added value chemicals are recovered from coal before subjecting this to destructive gasification to yield the smallest molecules, such as H 2 and CO, from coal macromolecules (C 20 -C 240 ). In the present studies, original Talcher coal was subjected to organo-refining using coal-derived solvents, such as anthracene oil and liquid paraffin. The residual coal obtained from organo-refining was pyrolyzed in steam atmosphere. The kinetics of the low temperature steam gasification of the original coal, residual coal, and their chars was studied. These studies would help in designing the reactor for the steam gasification of coals, residual coals, and chars, thereof. These pretreatments beneficially disrupt the structure of coal by exposing more active sites on the surface, by exposing more mineral matter, and by affording sufficient residual volatile matter in treated coals/chars to render these reactive for the steam gasification.

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Ethylenediamine-Assisted Solvent Extraction of Coal in N-Methyl-2-pyrrolidone: Synergistic Effect of Ethylenediamine on Extraction of Coal in N-Methyl-2-pyrrolidone

Cited by 43 publications

References 48 publications

Studies on the Desulfurization of Petroleum Coke by Organorefining and Other Chemical and Biochemical Techniques Under Milder Ambient Pressure Conditions

Studies on the Desulfurization of Petroleum Coke by Organorefining and Other Chemical and Biochemical Techniques Under Milder Ambient Pressure Conditions

Development of Catalyst Free Carbon Nanotubes from Coal and Waste Plastics

The Steam Gasification of Coal under Milder Low Temperature Conditions—Nonisothermal Kinetics Studies for Reactor Design

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