THERMAL ANALYSIS OF MIXING OF LOW GRADE COAL AND HIGH GRADE COAL BLENDS FROM PAKISTAN

University of the Punjab Conference Portal, 6th Symposium on Engineering Sciences

Saad Aziz

Last modified: 2016-12-01

Abstract

In this work thermal analysis of low and high grade coal blends has been performed. The high grade coal from Dukki + low grade coal from Chirag and Sinjidi were mixed separately in different ratios i.e high grade coal composition 20 wt %, 30 wt%, 40 wt % and 50 wt % and then blended in a sigma blender through stokepile method. The proximate analysis of these coal blend samples has been performed and comparison of their properties was made. The proximate analysis has been done according to ASTM standards i.e ASTM standard D3173-03 for moisture, ASTM standard D3174-04 for ash and ASTM standard D3175-02 for volatile matter and fixed carbon. Gross Calorific values of pure coals and their blends have been determined according to ASTM standard D5865-04 by using bomb calorimeter. It has been observed that the mixing of 50 wt% Dukki coal with 50 wt% Chirag and 50 wt% Sinjidi coal separately can provide optimum heating value as compared to other blends because of higher concentration of Dukki coal. Blending with chiragh coal is more favorable as compared to sinjidi because of its low heating value and higher ash and moisture content.

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