Optimization Of Independent Factors Influencing The Combustion Characteristics Of Carbonized Rice Husk Briquettes In A Fixed-Bed Reactor Under Oxy-Fuel Conditions

Abstract

This research aimed to optimize the independent variables affecting the combustion characteristics of carbonized rice husk briquettes during fixed bed combustion in an oxy-fuel condition. The optimization of oxy-fuel mass flux, binder ratio, and oxy-fuel ratio () was conducted in relation to average flame propagation speed, average burning rates, average thickness of the reaction zone, peak flame temperature, and ignition time through the use of response surface methodology (RSM). A total of seventeen distinct experiments were carried out utilizing combinations of oxy-fuel mass flow rates and ratios of binder and oxy fuel (oxygen to carbon dioxide) at three levels established by the Box Behnken Design method, a technique employed in response surface methodology (RSM). The ratio of oxy-fuel and the mass flow rate had the greatest effect on the combustion characteristics for all fuel samples. The optimal values for oxy-fuel mass flux, binder ratio, and oxy-fuel ratio were found to be 0.108 ,4.8 wt%, and 29.4% , respectively. The ignition time was measured at 243 seconds, with the reaction zone thickness averaging 254 mm and a peak optimal flame temperature of 1246°C. The maximum flame propagation speed and burning rate were determined to be 0.3169 mm/s and 0.046  respectively.