Fundamental Study of Coal Pyrolysis III. Functional Group and Pyrolysis products

The functional group contents of 18 rank Chinese coals were studied by the chemical analysis and the FTIR spectrum's anaysis. The results show that: the functional groups in coal are the function of coal rank, and the yields of CO 2, H 2O and CO are related to the content of carboxyl, hydroxyl and other oxygen containing groups such as ether groups in coal, and Tar and CH 4 are related to the aliphatic CH, the char yields to the aromatic CH. It's suspected that the coal pyrolysis is the functional groups decomposition.