Feasibility of using ultrasound-assisted process for sulfur and ash removal from coal

被引：49

作者：

Ambedkar, B. ^{[1
]}

Chintala, T. N. ^{[1
]}

Nagarajan, R. ^{[1
]}

Jayanti, S. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Particle Sci Lab, Madras 600036, Tamil Nadu, India

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2011年 / 50卷 / 03期

关键词：

Ultrasonic coal-wash; Acoustic cavitation; Acoustic streaming; Micro-streaming; Micro-jets; De-sulfurization; 2 TURKISH LIGNITES; PROCESS PARAMETERS; SUPERCRITICAL DESULFURIZATION; SUBBITUMINOUS COAL; POWER ULTRASOUND; RANK COAL; ACID; DEMINERALIZATION; HYDROXIDE;

D O I：

10.1016/j.cep.2011.02.008

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The present work investigates utilization of ultrasound in reagent-based coal de-ashing and de-sulfurization. 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, HNO3 and H2O2) 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. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：236 / 246

页数：11

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