| 摘要 |
A process to irreversibly dry and passivate lignitic coal, sub-bituminous coal, bituminous coal, or coal char by heating the coal material in the presence of a gas comprised of less than about five volume percent of oxygen (an inert environment) until the coal material has a moisture content of from about 0.01 to about 20 weight percent, heating the partially dried coal material to 100 to about 600 degrees Fahrenheit, charging the heated partially dried coal material to a fluidized bed reactor; feeding air into the fluidized bed reactor; contacting the heated partially dried coal material with the air while maintaining the heated partially dried coal material at a temperature of from about 450 to about 650 degrees Fahrenheit; and, thereafter, removing water from the heated partially dried coal material until no more than about 1 weight percent of water remains in the heated partially dried coal material.
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