Hot-gas cleanup—sulfur recovery technical, environmental, and economic issues

Gangwal, S.K.; Gupta, Rupali; McMichael, W.J.

doi:10.1016/0890-4332(95)90028-4

Cited by 26 publications

(25 citation statements)

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“…Thus, the gaseous products obtained from the low temperature steam gasification were not found to contain tars, higher hydrocarbons, phenolic liquors, and other oils that create problems in hot gas clean-up (Gangwal et al, 1995;Park et al, 2006). These studies resulted in the development of an integrated stepwise process of coal conversion to obtain value-added fuels and chemical feedstocks from coal (Sharma and Singh, 1993).…”

Section: Beneficial Effects Of Organo-refining and Steam Pyrolysismentioning

confidence: 97%

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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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Section: Beneficial Effects Of Organo-refining and Steam Pyrolysismentioning

confidence: 97%

“…In the IGCC configuration, a large quantity of fly ash in the effluent gas must be purified at a high cost to protect gas turbines from erosion. The problems are aggravated as even hot gas clean-up systems are still in the development stage (Gangwal et al, 1995;Park et al, 2006;U.S. Dept.…”

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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“…Petcoke has become a preferred fuel for the gasification for the integrated gasification combined cycle power generation (U.S. Department of Energy [DoE], 2006). It may be preferred over coal for gasification because of its low ash content (2-10%); however, the sulfur content in petcoke may require hot gas cleanup systems in the gasifiers, which are under development (Gangwal et al, 1995;Park et al, 2006). Petcoke has become a valuable product for the production of needle coke, carbon electrodes, carbon products, reductant, sulfur products, etc.…”

Section: Introductionmentioning

confidence: 99%

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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“…In the future, zinc-based sorbents will likely clean sulfur from gases fed to turbines in combined-cycle coal gasification units [8][9][10][11][12][13][14]. Zinc-based sorbents are used in guard beds to protect Fischer-Tropsch catalysts.…”

Section: Introductionmentioning

confidence: 99%

Rate phenomena in the reaction of hydrogen sulfide with a zinc oxide‐based sorbent

Palmer

Gutiérrez

Gidas

et al. 2010

Env Prog and Sustain Energy

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A zinc oxide-based sorbent was prepared by spraying drying a slurry containing 65% zinc oxide, 18% peptized alumina, and 17% perlite. The spray dried solids were dry sieved, wet sieved, dried at 1508C for 1 h, and subsequently calcined at 6358C for 1 h to produce the sorbent. The rate of sorption of hydrogen sulfide was measured as a function of time with a Cahn VersaTherm TM thermogravimetric analyzer. Sorption rate is reported as a function of hydrogen sulfide partial pressure, temperature, and external particle size. Sorption rate can be described by a hydrogen sulfide mass-transport model for agglomerated particles. This agglomerate kinetics model satisfactory explains rate phenomena observed in this system.

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Hot-gas cleanup—sulfur recovery technical, environmental, and economic issues

Cited by 26 publications

References 1 publication

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

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

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

Rate phenomena in the reaction of hydrogen sulfide with a zinc oxide‐based sorbent

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