Thermal measuring and testing – Thermal gravimetric analysis
Patent
1992-03-09
1993-05-04
Cuchlinski, Jr., William A.
Thermal measuring and testing
Thermal gravimetric analysis
G01N 2500, G01N 500
Patent
active
052075079
ABSTRACT:
A method for continuous thermogravimetric analysis of coal, or other materials rich in carbon, for volatile matter and ash content, including the steps of exposing a coal sample to an atmosphere consisting essentially of about 1 to 5% by volume of oxygen and the remainder being nitrogen and inevitable impurities at a first specified temperature for a first given time, weighing the coal sample to determine a first weight loss during the first given time, the first weight loss corresponding to the amount of volatile matter in the coal sample, burning the coal sample under an oxygen atmosphere having a higher than normal oxygen concentration for a second given time at a temperature sufficient to burn carbon containing materials in the coal sample, and weighing the coal sample to determine a second weight loss during the first given time and the second given time, the second weight loss corresponding to the amount of volatile matter and the amount of ash content in the coal sample.
REFERENCES:
patent: 4388410 (1983-06-01), Arroyo et al.
patent: 4838705 (1989-06-01), Byers, Jr. et al.
Hodgson, A., "A comprehensive thermal analysis apparatus," J. Sci. Instrum., 40(2), pp. 61-65 (Feb. 1963).
Wiedemann, H., "Universal Measuring Instrument for Gravimetric Investigations under Variable Conditions," Mettler Instrument Corporation, Princeton, N.J. (Feb. 1969).
"Thermal Analysis in Corrosive Gas Atmospheres," Mettler Instrument Corporation, Bulletin T-103, Princeton, N.J. (Mar. 1967).
Ishida Yoshihiko
Kimoto Hiroshi
Nakagawa Toshihiko
Saiga Mikindo
Seike Shoji
Cuchlinski Jr. William A.
Gutierrez Diego F. F.
NGK Insulators Ltd.
The Kansai Electric Power Co. Ltd.
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