Akademik Veri Yönetim Sistemi
International Communications in Heat and Mass Transfer, cilt.175, sa.P2, 2026 (SCI-Expanded, Scopus)
The gasification process, involving interrelated physical and chemical phenomena, produces a gas fuel converted from solid materials. Key mechanisms include multiphase flow, convective, conductive, and radiative heat transfers, a series of sequential mass transfer steps, drying, pyrolysis, gasification, and combustion, all interacting nonlinearly, further complicating the system. Due to the harsh conditions under which gasification occurs, collecting experimental data remains a significant challenge. Moreover, the process involves a large number of parameters and is both costly and time-consuming to investigate experimentally.Notably, the performance of horizontal column fluidized bed gasifiers has infrequently been examined using identical solid particles as both bed and fuel materials. Besides, design parameters such as pipe length, diameter, and solid feed inlet radius have seldom been optimized in conjunction with key process variables to enhance overall system performance. Hence, a comprehensive, accurate, and simplified three-dimensional Computational Fluid Dynamics (CFD) model has been developed to address these gaps. This model is targeted to simulate, analyze, and optimize the nonlinear, complex, multiphase, and multiscale nature of the gasification process. The primary objective of this study was to enhance heat and mass transport parameters while simultaneously increasing syngas yield, leading to maximizing specific synthetic gas yield relative to the reactor volume.The Response Surface Methodology (RSM) focused on two key variables: CO mass fraction and gasifier volume. Temperature, pressure, and velocity distributions were visualized, while syngas compositions (H2, CH4, CO, CO2) were computed for both coal and poultry manure feedstock.When compared to a vertical reactor under identical conditions, the horizontal column configuration demonstrates higher efficiency and lower pollutant emissions. It also means higher convective heat and mass transfer performance. Specifically, the CO mass transfer was increased from 0.32 to 0.35. The design of this fluidized-bed gasifier delivers significantly higher cold gas efficiency—typically around 70–80% versus 40–60% for vertical bed designs—while providing better temperature control and the ability to reduce hazardous emissions by 10%.