A COMPARISON OF DRIFT AND KBR PELLET METHODOLOGIES FOR THE QUANTITATIVE-ANALYSIS OF FUNCTIONAL-GROUPS IN COAL BY INFRARED-SPECTROSCOPY

Citation
M. Sobkowiak et P. Painter, A COMPARISON OF DRIFT AND KBR PELLET METHODOLOGIES FOR THE QUANTITATIVE-ANALYSIS OF FUNCTIONAL-GROUPS IN COAL BY INFRARED-SPECTROSCOPY, Energy & fuels, 9(2), 1995, pp. 359-363
Citations number
27
Categorie Soggetti
Engineering, Chemical","Energy & Fuels
Journal title
ISSN journal
08870624
Volume
9
Issue
2
Year of publication
1995
Pages
359 - 363
Database
ISI
SICI code
0887-0624(1995)9:2<359:ACODAK>2.0.ZU;2-V
Abstract
A set of pyridine soluble coal extracts, previously characterized by F ourier transform infrared spectroscopy using the KBr pellet technique, are now characterized using diffuse reflectance. The ratios of the ar omatic to aliphatic CH band areas are plotted against the ratio's of t he aromatic to aliphatic CH contents determined by proton NMR, thus al lowing the determination of the ratio of average absorption coefficien ts. This quantity varies with coal origin but also differs from that o btained using KBr pellets. This latter procedure produces superior cor relations and is to be preferred for accurate quantitative work.