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Feasibility of Using Ultrasound-assisted Process for Sulfur and Ash Removal from Coal by B. Ambedkar; T.N. Chintala; R. Nagarajan; S. Jayanti is a Engineering article available to read on EtoBox.

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The present work investigates utilization of ultrasound in reagent-based coal de-ashing and desulfurization. The coal under study was received from Girald mine, Rajasthan, India. Three different ultrasonic frequencies (25 kHz, Dual (58/192 kHz) and 430 kHz) and three reagents (HCl, HNO 3 and H 2 O 2 ) were used. The study employed a Taguchi fractional-factorial L 27 DOE. Experimental data were used to derive an empirical model for the prediction of total sulfur removal. The model incorporates cavitational intensity, reagent concentration, sonication time, coal particle size and coal concentration as key parameters. Effects of above factors on reagent-based ultrasonic coal-desulfurization are presented here. An optimum set of process parameters are identified and validated. Larger-scale trial with high-ash and high-sulfur coals is strongly recommended.

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Author

B. Ambedkar; T.N. Chintala; R. Nagarajan; S. Jayanti

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0255-2701)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)