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Relationships Between Heating Value and Lignin, Fixed Carbon, and Volatile Material Contents of Shells from Biomass Products

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The higher heating value (HHV) at a constant pressure measures the enthalpy change of combustion with water condensed. The HHVs of 7 species of biomass shells were correlated with their lignin, fixed carbon, and volatile material contents. There was a highly significant correlation between the HHV of the fruit shells and the lignin, fixed carbon, and volatile material contents. The HHVs (MJ/kg) of the biomass shells as a function of lignin (LC), fixed carbon (FCC), and volatile material (VMC) contents were calculated using the following equations:

HHV = 0.0864 (LC) + 16.6922, (2)

HHV = −0.066 (FCC)2 + 0.5866 (FCC) + 8.752, (3)

HHV = −0.0066 (VMC)2 + 0.7371 (VMC) + 1.2305 (4)

for Equations (2)-(4), which in square of the correlation coefficients (r2) were 0.9734, 0.8281, and 0.8281, respectively.
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Keywords: agricultural biomass; calculation; heating value; relationships

Document Type: Research Article

Affiliations: P. K. 216, Trabzon, Turkey

Publication date: July 1, 2003

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