Akademik Veri Yönetim Sistemi
Biomass and Bioenergy, cilt.201, 2025 (SCI-Expanded)
Gasification is a thermochemical process in which multiple simultaneous reactions occur, widely used in the conversion of biomass into bioenergy products. Studies to effectively bring end-of-life (non-reusable) banknotes, which generate regular waste worldwide, into the economy are gaining importance. Valuable gases, which can be used for producing energy and various chemicals, can be obtained by gasification of end-of-life banknotes with high cotton content, which are classified as lignocellulosic waste biomass and generate regular waste worldwide. Mathematical models are developed to understand the gasification mechanisms and kinetics. The gasification mechanism involving irreversible steps in the steam reforming, water-gas shift, Boudouard, and hydrogasification reactions was proposed to study the gas-phase kinetics in the stirred semi-batch reactor. Experimental data were obtained from the study on the gasification of end-of-life cotton banknotes with air–steam mixture in a fluidized bed reactor under different operating conditions. The conformity of the proposed model to the experimental data consisting of the producer gas content as mole fractions was determined by using the Kalman filter in MATLAB and evaluating the sum of the squared differences between the experimental data and the values calculated from the model. The reaction rate constants, frequency factors, and activation energies were calculated. Considering the complexity of the gasification reactions, the values obtained showed that the proposed model is compatible with the experimental data. The steam reforming reaction had the lowest activation energy (3.1 kJ/mol) and largest reaction rate constant. This result demonstrates the importance of the steam reforming reaction for increasing H2 and CO yields. The hydrogasification reaction had the highest activation energy (16.6 kJ/mol) among the main gasification reactions.