Desulfurization of High Sulfur Coal Leached with H2O2 and NaOH by Microwave Irradiation

Zhang, Pengqi; Zhang, Shengfu; Shao, Lixiong; Bing, Mingcheng; Qiu, Shuxing; Zhang, Qingyun

doi:10.1007/978-3-319-51091-0_24

“…Generally the results indicate that the Sulfur removal increases with decrease in the particle size of the coal, whereas the use of HNO3 as leaching solvent gives much better results in terms of Sulfur reduction compared to the NaOH solvent. The NaOH when treated with H2S2 gave much better results (54% Sulfur reduction) in a previous work [18]. The trend of increase in the Sulfur reduction with decrease in coal size may give better results when the particle size of the coal will be reduced to higher mesh number.…”

Section: Methodsmentioning

confidence: 60%

Desulfurization of Mach Coal of Balochistan by Leaching Method

Mushtaq¹,

Ullah²,

Khan³

et al. 2021

Journal of Applied and Emerging Sciences

0

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Coal desulfurization prior to usage is frequently subjected to preprocessing to achieve clean fuel and reduce environmental impacts. In this study, desulfurization of Mach coal of Balochistan was investigated with different leaching solvents. The solvents used are NaOH and HNO3. Effects of particle size and solvent weight% on sulfur removal were studied, whereas the leaching temperature and the agitation time were kept constant. Desulfurization experiments were carried out for 12 samples of different composition based on different particle size and solvent weight%. Significant reduction in Sulfur was attained when the coal particle size of 10 Mesh was used. The results indicated that Sulfur reduction was highest of 44.88% when HNO3 was used as compare to NaOH which gave maximum Sulfur reduction of 24.72%. Sulfur recovery was found to increase with increasing solvent concentration. Decreased desulfurization was observed with larger coal particle size of 6 Mesh. Leaching process using variable solvent concentration was found effective and could be inexpensive for desulfurization of coal.

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“…Generally the results indicate that the Sulfur removal increases with decrease in the particle size of the coal, whereas the use of HNO3 as leaching solvent gives much better results in terms of Sulfur reduction compared to the NaOH solvent. The NaOH when treated with H2S2 gave much better results (54% Sulfur reduction) in a previous work [18]. The trend of increase in the Sulfur reduction with decrease in coal size may give better results when the particle size of the coal will be reduced to higher mesh number.…”

Section: Methodsmentioning

confidence: 60%

Desulfurization of Mach Coal of Balochistan by Leaching Method

Mushtaq¹,

Ullah²,

Khan³

et al. 2021

Journal of Applied and Emerging Sciences

0

View full text Add to dashboard Cite

Coal desulfurization prior to usage is frequently subjected to preprocessing to achieve clean fuel and reduce environmental impacts. In this study, desulfurization of Mach coal of Balochistan was investigated with different leaching solvents. The solvents used are NaOH and HNO3. Effects of particle size and solvent weight% on sulfur removal were studied, whereas the leaching temperature and the agitation time were kept constant. Desulfurization experiments were carried out for 12 samples of different composition based on different particle size and solvent weight%. Significant reduction in Sulfur was attained when the coal particle size of 10 Mesh was used. The results indicated that Sulfur reduction was highest of 44.88% when HNO3 was used as compare to NaOH which gave maximum Sulfur reduction of 24.72%. Sulfur recovery was found to increase with increasing solvent concentration. Decreased desulfurization was observed with larger coal particle size of 6 Mesh. Leaching process using variable solvent concentration was found effective and could be inexpensive for desulfurization of coal.

show abstract