Chiang Mai Journal of Science

     Biomass presents a promising alternative to fossil fuels, and its potential can be further enhanced through co-pyrolysis with plastics or polymers. This study investigates the feasibility of co-pyrolyzing corncob, sawdust, and low-density polyethylene (LDPE) for bio-oil production. Characterization of the feedstocks using ASTM standard revealed significant hemicellulose content in corncob (28.58%) and sawdust (25.32%), indicating their potential for yielding lighter bio-oil components. Proximate analysis using ASTM standard indicated volatile matter contents of 76.11±0.23% for corncob and 71.24±0.54% for sawdust, while LDPE exhibited a higher calorific value of 41.23 MJ/kg compared to 8.10 MJ/kg for corncob and 26.20 MJ/kg for sawdust. FTIR analysis identified notable C=O carbonyls, C=C alkenes and aromatic content in corncob and sawdust, suggesting their suitability for bio-oil production. Thermogravimetric analysis revealed significant weight loss for corncob and sawdust between 200°C and 400°C, corresponding to hemicellulose and cellulose decomposition, whereas LDPE degradation commenced at 400°C. Differential thermal analysis curves confirmed endothermic peaks for both biomass resources and LDPE, indicating thermal stability. These findings underscore the potential of co-pyrolysis in enhancing bio-oil yield and quality, thereby contributing to waste reduction and sustainable energy solutions.