Structural investigations of Australian coals—I. A characterization of Victorian brown coal lithotypes and their kerogen and humic acid fractions by i.r. spectroscopy |
| |
| Authors: | TV Verheyen RB Johns |
| |
| Institution: | Department of Organic Chemistry, University of Melbourne, Parkville, Victoria, Australia 3052 |
| |
| Abstract: | The functional groups of brown coal lithotypes, their humic acids and kerogens were investigated by elemental analysis and quantitative infrared spectroscopy using absorption coefficients.An inverse relationship is reported between the concentrations of kerogen and humic acids for each lithotype and significant variation in the levels of humic acids with lithotype are attributed to changing higher plant input and depositional environments.The structural implications of observed trends in absorption coefficients and their usefulness as a rapid method of functional group analysis has been investigated. Using this infrared technique, kerogen structures as reflected in functional group analyses were found to exhibit a dependance on lithotype, although no significant variation in the functionality of the humic acid structures was observed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
