An oil palm trunk (OPT) and empty fruit bunch (EFB) used in this experiment was supplied by Malaysian Palm Oil Board (MPOB). The feed stocks were first milled and sieved into smaller particle size of <0.30 mm. The characterizations of both OPT and EFB samples were performed in order to obtain its ultimate, proximate and high heating value (HHV). The ultimate analysis was carried out using elemental analyzer which determines the content of C, H, N and S in the feedstock. The proximate analysis was conducted using thermogravimetric analyzer (TGA) to analyze volatile matter (VM), fixed carbon (FC), moisture content and ash content in both investigated biomass samples. The higher heating value of OPT and EFB was determined using bomb calorimeter. Experimental procedures TGA was carried out in the presence of nitrogen (N2) at the flowing rate of 150 ml/min. EFB and OPT samples between 0.5 and 1.0 g was pyrolyzed to a maximum temperature of 700°C. The sample was first heated to 110°C and kept at that temperature for 30 minutes to remove any moisture. After that, the samples were individually heated at heating rates of 50°C/min and 80°C/min until 700°C.
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