Determination of Cocombustion Kinetic Parameters for Bituminous Coal and Pinus Sawdust Blends.

9 experiments showed a decreasing trend on the overall activation energy ( E a ) as the biomass proportion was increased to about 30% which was also supported by Chen et al. 10 When the biomass proportion was increased beyond 30%, its effect on E a heavily became dependent on the biomass species under study hence the increasing trend at specific conversion percentages.

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The kinetic parameters were evaluated using the distributed activation energy model (DAEM) due to its ability to evaluate complex parallel chemical mechanisms. The influential homogenous volatile combustion and heterogenous combustion stages produced an increasing trend for activation energy ( E a ) with increased PS (100HC to 70HC30PS) from an average of 61.80–104.34 kJ/mol while the pre-exponential factor increased from 1.31 × 10 5 to 6.52 × 10 8 .

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