RELEASE BEHAVIOR OF Pb and Cd DURING COAL GASIFICATION

摘要

From the study it indicates the occurrence modes of elements Cd and Pb in YM coal were different. Pb was mostly associated with mineral matter in various forms. A large part of the Cd was associated with pyrite, bound to organic matter and in the residues. Cd, and Pb in forms of ion exchangeable, carbonates and Fe-Mn oxides were unstable during gasification over the temperature range studied. During coal gasification, the volatility of Pb and Cd varied with gasification temperature significantly.