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A typical proximate analysis includes the moisture, ash, volatile matter, and fixed carbon contents.
The water and ash content, volatile matter and fixed carbon contained in the briquette samples were also determined.
The proximate analysis has been carried out as per ISI specifications (BIS 2003) to determine the contents of moisture, ash, volatile matter and fixed carbon.
With proximate analysis, the substances of moisture, ash, volatile matter and fixed carbon in the coal content are determined as weight percent.
While the moisture percentage ranged between 7 and 13 %, ash ranged from 3.50 to 18.86 %, and volatile matter and fixed carbon ranged between 51 78 % and 18 39 %, respectively.
The volatile matter and fixed carbon contents significance were that they provided a measure of the ease which the biomass could be gasified and oxidized in the combustion process.
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The combustion process of these fuels includes three stages, which were evaporation of water, combustion of the volatile matters and fixed carbon respectively.
Sensitivity analysis shows that, nitrogen (dry), carbon (dry), hydrogen (dry), Btu (dry), volatile matter (dry) and fixed carbon (dry) have positive effects and moisture, oxygen (dry), ash (dry) and total sulfur (dry) have negative effects on FSI.
moisture (M), ash (A), volatile matter (VM) and fixed carbon (FC) are presented in Table 1.
Among coal properties, volatile matter, ash content and fixed carbon have significant effect, followed by moisture content.
Most of the heat value of a coal comes from its volatile matter, excluding moisture, and fixed carbon content.
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