Effects of Heating Rate and AAEM on the Production of NH_3 and HCN during Pyrolysis of Shengli Brown Coal

摘要

This study is to examine the effects of heating rate and AAEM (alkali and alkaline earth metallic species) on thegeneration of NH_3 and HCN during the pyrolysis of Shengli brown coals at two different temperatures of 773 and 1073 K. All theexperiments were conducted in a fixed-bed/fluidised-bed quartz reactor. The results show that high heating rate and hightemperature have substantially promoted the formation of both NH3 and HCN. By comparing the results from raw coal andacid-washed coal, it was found that reduction in AAEM (mainly Na and Ca in this case) could lead to less production of NH3, butmore formation of HCN.