@article{article_1715421, title={Production of Hydrogen-Rich Syngas from Mixed Wastes via Gasification Process}, journal={European Journal of Engineering and Applied Sciences}, volume={8}, pages={69–80}, year={2025}, DOI={10.55581/ejeas.1715421}, url={https://izlik.org/JA63SN52ZH}, author={Öngen, Atakan and Yeşilova, Nazlıcan}, keywords={Atıktan enerji, Gazlaştırma, Hidrojen, Sentez Gaz, Sürdürülebilir atık yönetimi}, abstract={This study investigates the relationship between cold gas efficiency and the H₂/CO ratio in the gasification of various biomass-based waste streams, aiming to optimize the energy and chemical performance of the produced syngas. Experiments were conducted using green waste, olive pomace, and sewage sludge under varying operational conditions, including different temperatures, gasifying agents, and flow rates. The calorific value of the resulting syngas ranged between 5 and 14 MJ/kg, while gas conversion efficiencies varied from 28% to 68%. Maximum syngas quality was achieved at higher temperatures and lower gasifying agent flow rates.The H₂/CO ratio reached up to 5 for green waste, 4 for olive pomace, and 6 for sewage sludge, indicating the potential to produce hydrogen-rich syngas from diverse feedstocks. Cold gas efficiencies were recorded as 92%, 62%, and 73%, respectively. These results demonstrate that waste-specific operational optimization can significantly enhance syngas composition and efficiency. This research contributes to the waste-to-energy literature by providing a comparative assessment of mixed waste gasification under different conditions, with a focus on hydrogen-rich syngas production. The innovative aspect lies in the integrated evaluation of both energy efficiency and H₂/CO balance across multiple feedstocks. The syngas produced can be utilized directly in energy systems such as gas turbines and internal combustion engines or serve as an intermediate for chemical synthesis processes, including methanol and ammonia production. The findings offer a promising approach for sustainable waste management and resource recovery through thermochemical conversion.}, number={1}, organization={TÜBİTAK, İSTANBUL UNIVERSITY-CERRAHPAŞA}