CLEAN FUELS FROM LOW GRADE COALS FOR THERMAL POWER STATIONS THROUGH BATCH AND SEMICONTINUOUS SOLVENT REFINING TECHNIQUE USING COAL DERIVED SOLVENTS UNDER AMBIENT PRESSURE CONDITIONS AND COMBUSTION (FIRING) CHARACTERISTICS OF SOLVENT REFINED COAL AND OF RESIDUAL COAL
作者:
D.K. Sharma,
R.K. Sharma,
期刊:
Fuel Science and Technology International
(Taylor Available online 1992)
卷期:
Volume 10,
issue 10
页码: 1625-1640
ISSN:0884-3759
年代: 1992
DOI:10.1080/08843759208905365
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Availability of good quality coals is declining. Firing of low grade coals with frequent variation of quality in thermal power stations is problematic and involves environmental pollution hazards. Low grade coals can be refined through solvent extraction. Solvent refined coal obtained through solvent extraction is a clean and high calorific value coal with a uniform quality. This has good flammability characteristics because of its high volatile matter contents and low ash contents. Batch extraction of low grade coal earn Dies obtained from two different thermal cower stations in new Delhi, in anthracene oil (a coal derived solvent) has been reported. Semi-continuous extraction of these coals by successive extraction techniques using anthracene oil (AO) followed by liquid paraffin (LP) solvents haB also been carried out and reported. Kinetic studies of the extraction of coal in AO has been performed. About 35% coal was rendered extractable through semicoatinuous extraction. The residual coals obtained after solvent refining were found to be free flawing and contained sufficient volatile matter for making these suitable for firing in fluidized bed combuators for integrated combined cycle power generation.
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