Katalitik ve birlikte gazlaştırmanın deneysel ve teorik incelenmesi

Co-gasification and catalytic gasification are suitable to enhance overall system energy efficiency by increasing reaction rates and reducing operating temperature. However, co-gasification and catalytic gasification as a thermal conversion is thought of complex phenomena that involve several chemical and physical processes like alteration of physical properties and chemical reactions including heat and mass transfer. This dissertation aims to investigate theoretical and experimental determination of synergistic interactions of co-gasification and catalytic gasification for biomass, coal and their blends. Therefore, in this study, hazelnut husk, Çan lignite and their blend were gasified in NETZSCH 449 Jupiter F3 thermogravimetric analyzer under catalytic and non-catalytic conditions by CO2 gasification. By the aid of thermogravimetric analyzer data, the non-isothermal kinetic analysis was conducted by using differential and integral isoconversional methods; Friedman and Flynn-Wall-Ozawa (FWO) method, respectively. The kinetic results were used for determination of catalytic effect. Furthermore, theoretical study was performed by using fluidized-bed gasifier in the Aspen Plus® software to determinate synergistic interactions. The validation results obtained from simulations in Aspen Plus® depicted a good agreement with the experimental results from literature, so the demonstration of the model in Aspen Plus® can be employed to predict the composition and exergy value of syngas accurately.