Use of Gas Chromatography/Matrix Isolation Infrared Spectroscopy (GC/MI-IR) And Supercritical Fluid Chromatography (SPC) for Waste Characterization.

摘要

The main objectives of this project are: (1) apply advanced instrumentation, GC/MI-IR, supercritical fluid extraction (SFE), and SFC, for characterization of organic compounds present in coal waste products; (2) optimize conditions for SFE of coal and coal waste samples. The data from these techniques and from analysis by gas chromatography/mass spectrometry (GC/MS) is expected to aid in the identification of isomeric and high molecular weight compounds found in coal waste materials. Wastes produced by processing of coal and other fossil fuels are generally treated, chemically or biologically, before disposal. A knowledge of the chemical composition of wastes generated from these processes is required to aid in the design of innovative techniques for obtaining material suitable for safe and economical disposal. In order to characterize compounds, which could not be identified using GC/MS alone, we have applied SFE, SFC, and GC/MI-IR. GC/MI-IR was used for identifying several isomers and SFC was used to fractionate complex mixtures. More recently, we have employed SFE for directly coupled extraction of a coal sample followed by capillary SFC analysis.