2.1 Materials preparation and characterization 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 particlesize 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.
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