Thermogravimetry-Photoionization Mass Spectrometry of Different Rank Coals

摘要

Volatile matter evolved during pyrolysis of 20 different rank coals was studied by thermogravimetry-photoionization mass spectrometry (TG-PI-MS). The compostion of the TGA effluent revealed several signficant trends with coal rank. First, the relative intensities of peaks due to compounds containing oxygen such as C_nH_2nO (n=2,3, or 4), phenols, and dihydroxybenzenes decreased with increasing coals rank. Also, the relative intensities of peaks due to armoatic compounds such as naphthalenes, pehnanthrenes, and pyrenes increased with increasing coal rank.