Application of subcritical and supercritical fluids in coal extraction and analysis
Coal is used to generate electricity and produce high-value chemicals through coal gasification, liquefaction, and coke. During combustion sulfur is released, which leads to acid rain formation. Mineral matter present in coal is undesirable because it causes technological problems such as corrosion of equipment and reduction of overall rate of combustion of coal. Also, after combustion, the minera