Quantitative X-ray diffraction analysis and its application to various coals

Progress in coal pyrolysis

TG-FTIR analysis of biomass pyrolysis

Combustion of an Illinois No. 6 coal char simulated using an atomistic char representation and the ReaxFF reactive force field

Synergies in co-pyrolysis of Thai lignite and corncob

This paper describes the most recent improvements in the apparatus and presents its application in characterizing the Argonne premium coal samples. The TG-FTIR apparatus for pyrolysis, oxidation of pyrolysis products, and oxidation of the sample is described. To analyze coal, a sequence of drying, pyrolysis, and combustion is employed to obtain proximate analysis, volatile composition, volatile kinetics, and relative char reactivity. Pyrolysis results are presented for the eight Argonne coals, several demineralized coals, and two oxidized samples of Pittsburgh Seam coal. A kinetic analysis was applied to species evolution data collected at several different heating rates. There is a systematic variation in rate with rank

Analysis of the argonne premium coal samples by thermogravimetric fourier transform infrared spectroscopy

For the characterization of hydrocarbons, thermogravimetric (TG) analysis techniques have proved very useful. However, TG analysis by itself does not identify the decomposition products. When TG analysis is coupled with evolved product analysis by FT-IR, a wealth of information regarding the composition of pyrolysis and oxidation products is obtained. The application of TG-FTIR to coal and petroleum source rock has been described in two recent publications. The most difficult to analyze effluents are the heavy decomposition products which condense at room temperature. These condensates such as tars from coal, asphaltenes and pre-asphaltenes from petroleum or coal derived liquids, and oligomers from polymers are invariably the major evolved products from most hydrocarbons. Their amount and composition are important in predicting the behavior of the hydrocarbon in an upgrading or conversion application. A recently designed apparatus, the Bomem TG/Plus, which combines a DEUPONT 951 TGA with a multi-pass gas cell and a MICHELSON FT-IR provides a standard TG analysis while simultaneously monitoring these condensible products as well as gases. The purpose of this paper is to describe the application of the TG/PLUS for the analysis of heavy hydrocarbons.

M. Baillargeon

Papers

Analysis of the argonne premium coal samples by thermogravimetric fourier transform infrared spectroscopy

Characterization of petroleum feedstocks by TG-FTIR