Saha, Sujan and Sharma, Bijay Kumar and Kumar, Saroj and Sahu, G. (2007) Density measurements of coal samples by different probe gases and their interrelation. Fuel, 86 (10-11). pp. 1594-1600. ISSN 0016-2361

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Abstract

Density is useful in deducing the spatial structure of coals. In this paper, nitrogen has been used instead of the commonly employed helium, for the gas displacement pycnometer based density determination of a number of coals of Indian origin. The results show that the nitrogen-based densities are always higher than the helium-based ones. Also, empirical relationships between the helium-based and nitrogen- based coal densities have been developed by two modeling methods, namely, multi-variable regression and artificial neural networks. Although the two models have fared well, the neural network model exhibits a relatively better prediction accuracy and generalization performance than the regression model. This study thus demonstrates that nitrogen, which is cheaper and easily available, can be used gainfully as the probe gas for estimating the true density of coals.

Item Type:	Article
Uncontrolled Keywords:	Helium-based density; Nitrogen-based density; Empirical relationship
Subjects:	Resource Quality Assessment and Coal Petrology
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	04 Jan 2012 11:43
Last Modified:	04 Jan 2012 11:43
URI:	http://cimfr.csircentral.net/id/eprint/575

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