Gasification of powdered coal in filtration regime with a super adiabatic heating

A new method is proposed for gasification of a powdered coal in filtration regime with superadiabatic heating. The fuel is supplied suspended with the flow of oxidant gas, whereas the gas flow filters through a porous bed of large particles making a heat recovery medium. Owing to the heat exchange between countercurrent solid and gas flows part of the heat is recuperated and transferred from the products to the reaction zone. The heat accumulation in a relatively narrow combustion zone can result in the temperature within the combustion front substantially higher than the adiabatic temperature calculated for the initial temperature of the reactants being that ambient and the heat of the reaction is evenly distributed over the products. (paper)