Akademik Veri Yönetim Sistemi
CHEMICAL ENGINEERING RESEARCH & DESIGN, cilt.220, ss.392-411, 2025 (SCI-Expanded, Scopus)
Day by day, hydrogen has become a critical component in achieving a sustainable economy and energy utilization worldwide due to its widespread usage as an energy carrier. In this work, therefore, steam gasification of walnut shells (WS), sunflower seed shells (SFS), carbon blacks of automobiles (ATCB) and trucks (TTCB) tyres, and waste polyetyhlene (PE) was investigated via a thermodynamic equilibrium model to produce hydrogen-rich syngas. Suitable gasification temperatures and steam/fuel ratios were obtained for each fuel with a sensitivity analysis. Besides model validation study was carried out for H-2/CO ratio and syngas compositions with optimal parameters using a ChemCAD simulation model. In view of these studies, the results indicated that WS and SFS could be preferred to produced hydrogen-rich syngas instead of ATCB, TTCB and, PE owing to possible biomass's chemical structure (>700 degrees C). In addition, the carbon black of the truck tyres can be used specifically to produce methane-rich syngas (600 degrees C-S=0.7). Furthermore, syngas quality was specified with lower heating value (LHVsyngas) values of produced syngas. Lower gasification temperatures and steam/fuel ratios enhance to obtain higher LHVsyngas values. The maximum LHVsyngas was obtained as 24.6 MJ/Nm(3) at 800 degrees C and S= 0.5 for TTCB. The minimum relative error percentage (RE%) was obtained from PE simulation results. RE% of SFS for H-2/CO ratio was determined as 0.56 %. These results submitted to be valuable for gasification processes to serve as a quick guide to suitable conditions.