Condensed and Gaseous Products Chemistry in the Combustion and Gasification of High-Sulfur Coal

摘要

A recently developed computer program, based on geometric programming, is used to calculate condensed and gaseous products chemistry in the combustion or conversion of high-sulfur Illinois No. 6 coal. Under 30% air-excess and 30% air-deficient conditions, product chemistries were calculated as a function of temperature. For the temperature ranges of 1800 to 1100 sup 0 K, condensed phases are saturated with solid silica, and the major ''Na'' and ''Cl'' bearing gaseous species are NaCl and HCl. The concentration of sulfates (under oxidizing conditions) or sulfides (under reducing conditions) in the silica-saturated molten silicate solutions increases progressively with a decrease in temperature. The liquid condensates appear to be more complex than believed, and ''hot corrosion'' by silicates could be important. (ERA citation 13:010763)