Abstract
In a series of studies on coal cleaning, the present study was carried out to clarify the release behavior of boron during pyrolysis and gasification and to find an optimum condition for controlled release with some additives. Dependency of boron release on temperature was characterized by two parts, low ( < 1173 K ) and high ( > 1173 K ) temperature range in pyrolysis of coals. Appreciable release of boron was not observed during gasification except for Ebenezer coal. The addition of SiO_2 and CaO was very effective for suppressing the boron release at the pyrolysis below 1173 K and gasification. Al_2O_3 was also effective for the release control of boron in the pyrolysis at 1473 K.
