Optimization Study of H2/CO Ratio in the Steam Gasification of PKS using Coal Bottom ash for fuel Production through Response Surface Methodology

H₂ and CO are the most critical components within the product gas obtained from the gasification of biomass. The composition of H₂ and CO is of significant importance as their ratio defines the utilization of the syngas. Application of syngas can include power generation, chemical products such as methanol, NH₃, and FT diesel. The objective of this study to optimize the parametric conditions for H₂/CO ratio in the gasification of PKS in TGA-MS set up using coal bottom ash as a catalyst and CaO as adsorbent. The experiments were designed using RSM and the effect of parameters such as temperature from (650-750 °C), particle size (0.5-1.0 mm), CaO/biomass ratio (0.5-2.0), and CBA wt % (0.02-0.10). The study demonstrates that the H₂/CO ratio is mostly influenced factor followed by the temperature and particle size, whereas the CaO/biomass ratio and CBA wt% are third and fourth influencing factors on H₂/CO ratio. The maximum H₂/CO ratio of 1.47 at optimum temperature of 715 °C, Particle size of 0.65 mm, CaO/biomass ratio of 1.45, and CBA wt % of 0.09%. H₂/CO ratio is important for its conversion into many products, such as methane, methanol, and FT diesel.