应用TG-FTIR联用研究催化剂对煤热解的影响

The catalytic effects of alkali, alkaline earth and transition metals on pyrolysis of a lignite and a bituminous coal were investigated using TG-FTIR. The results indicate that the orders of catalytic effect on the pyrolysis of lignite and bituminous coals are Ni>Fe～Ca>K and Ca～Fe>Ni>K, respectively. The maximal increments of conversion for the lignite and the bituminous coal are 10.1% and 6.4% respectively with catalysts loaded. The CH4 yield of the bituminous coal is larger than that of the lignite. The increase in yield of CO2, H2O, CH4 and CO is dependent on the catalysts, which are closely related to temperature region and coal ranks.