developed by incorporating the crucial effects of the pyrolysis fraction (fp) and CRF. Experiments were performed using a twostage hot-rod reactor to determine the kinetic parameters for the tar cracking reaction. The model matched the scope of evidence (Chee [58], Senelwa [57], Manurung & Beenakers [10]) more efficiently than did the model by Giltrap et al. [11]. The effects of the parameters suchasthe lengthof thegasification zone(L), initialgas temperature (Tg), air flowrate (Wa), and mole fraction of O2 in primary air ðXO2Þ on product compositions were analyzed using a validated model. The optimum gasification zone length based on conditions in the model was 0.7 m. The high initial gas temperatures in the gasifier led to the formation of CO and increased tar conversion and consequently, higher LHV. The gasifier should be operated at an optimum temperature based on the operating parameters because preheating to a higher temperature does not enable the gasifier to operate at its maximum efficiency. The CO mole fraction increased and H2 mole fraction decreased with a slight increase in the mole fraction of O2 in primary air, whereas a small increase in the primary air flowrate predicted a substantial decreaseintheCOmolefractionandaslightincreaseintheH2mole fraction. The increase in the primary air flowrate increased the tar yield by reducing the residence time, whereas the increase in the mole fraction of O2 in primary air predicted a decrease in tar yield. To maximize the CO composition and tar conversion, the initial gas temperature (Tg) is more crucial. The least sensitive parameter was