Membran reaktörde biyogazdan hidrojen üretimi

The interest in the production of clean hydrogen has increased due to the depletion of fossil fuels and the increase in energy demand. The hydrogen production by the membrane reactors that provide both hydrogen production and hydrogen separation in the same device is increasing day by day. In this thesis, the mathematical modeling method is used to improve the performance of the membrane reactor providing hydrogen production from biogas and methane. 1-dimensional models of a membrane reactor were developed by MATLAB program and validated separately. The temperature distributions of the reactor, the change of molar flow rates of all species, methane conversion, and hydrogen recovery were investigated along the reactor length. The validated 1-dimensional membrane reactor model was integrated into an integrated system consisting of CO2 capture system and various plant components and the system-level model was developed in the MATLAB program using principles of electrochemistry (reaction kinetics) and thermodynamics (energy and exergy analysis). The effects of some operating parameters (operating temperature, steam-carbon ratio, and reaction pressure) on system performance were investigated. Then, the exergy destruction rates of each component in the integrated system and the exergy destruction rate values of each component were examined. Moreover, in order to better understand the operating principle of the membrane reactors, the experimental studies were realized at the Membrane Technology Institute in Italy. Finally, 2-dimensional membrane reactor models were developed using COMSOL Multiphysics software to investigate the behavior of the reactor through both the axial and radial directions.