Pyrite Desulfurization by Wet Oxidation in Alkaline Solutions

Chuang, K.C.; Chen, M.-C.; Greer, Raymond T.; Markuszewski, R.; Sun, Yi; Wheelock, T.D.

doi:10.1080/00986448008912550

Cited by 24 publications

(6 citation statements)

References 1 publication

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“…The reduction in particle size with reaction was not considered in the rate equation. Chuang et al (1980) have studied the reaction between dissolved oxygen and pyritic sulfur under alkaline conditions and have reported that the ratecontrolling step is the diffusion of oxygen through the product FeaOg layer. However, the above study was performed using pure pyrite, and the particle sizes are much larger than those encountered in coal samples of practical interest.…”

Section: Chowdhury Andmentioning

confidence: 99%

Wet Air Oxidation

Mishra¹,

Mahajani²,

Joshi³

1995

Ind. Eng. Chem. Res.

711

482

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Section: Chowdhury Andmentioning

confidence: 99%

Wet Air Oxidation

Mishra¹,

Mahajani²,

Joshi³

1995

Ind. Eng. Chem. Res.

711

482

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“…Using a promoted oxydesulphurisation process, experimental results of the various coals investigated have shown that 95% pyritic sulphur and up to 40% organic sulphur was removed [26,27]. Other major processes for coal desulphurization are on their way towards commercialization [28][29][30][31]. Joshi and Shah [32] investigated the kinetics of organic sulphur removal.…”

Section: Introductionmentioning

confidence: 99%

High Pressure Oxydesulphurisation of Coal—Effect of Oxidizing Agent, Solvent, Shear and Agitator Configuration

et al. 2016

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Abstract:The ambient temperature high pressure oxydesulphurisation technique was investigated to reduce the sulphur content. Prince of Wales coal was chosen for this study. The focus of the study was to investigate the reduction of both pyritic and organic sulphur while changing the KMnO 4 /Coal ratio, agitation speed, agitator configuration, and shear. The effect of different concentrations of acetone as a solvent and effect of particle size on the sulphur removal was also studied by a series of experimental runs at ambient temperature. Heating value recovery was found to be increased with the decreased KMnO 4 /Coal ratio and with decreased acetone concentration. It was found that sulphur removal was enhanced with the increase in shear using a turbine impeller. The effect of particle size was more significant on the pyritic sulphur removal as compared to the organic sulphur removal while heating value recovery was found to increase with decreased desulphurization tome for both, under atmospheric and high pressure.

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“…A majority of these processes involved treating coal, most often in an aqueous mediiini, with oxidizing agents or alkalies [4- eniploying oxidants ranging from strong oxidants (HNO:, and H 2 0 Z ) to metal ions (Fe+:', Ag+) arid gaseous species (air, O y , SO,, NO,, Cl,, etc.) has heen extensively studied [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%