The study on gasification reactivity of fly ashfrom fluidized bed gasifier

摘要

A study on the gasification reactivity of two dinds of fly ashes (Shenfu and Dongshan coal fly ash) from fluidized bed gasifier and Shenfu char from laboratory is reported.The reactivity of fly ash is higher than that of char from laboratory in the C+CO_2 system,but is lower in the C+H_2O,and C+CO_2+H_2O reaction area was studied in microstructure scale.In addition,the gasification kinetics of two fly ashes with CO_2,H_2O and their mixture was studied.From the derived rate equations,the reaction condition and particle residence time for increasing carbon conversion of fly ash were inferred.