Modelado y Simulación de un Reformador Autotérmico

PIÑA, JULIANA; BORIO, DANIEL OSCAR

La Plata, Argentina

Workshop; Producción y Purificación Catalítica de Hidrógeno para Celdas de Combustible; 2005

CONACA, UNLP, ANPCyT, CIC, CINDECA, CYTED

The steady–state operation of the ATR is simulated as two reactors in series by means of a detailed mathematical model. An input-output model is selected to describe the upper combustion chamber. The possible occurrence of homogeneous steam reforming and water-gas-shift reactions is considered. The catalyst bed is represented through a one-dimensional heterogeneous model, which allows calculating the axial variations of composition, temperature and pressure of the process gas stream. The strong intraparticle diffusional limitations are taken into account by rigorous solution of the mass balances inside the catalyst particle. The gas-solid heat-transfer resistances are also evaluated. An intrinsic kinetics is used for the steam reforming and water-gas-shift reactions. Heat losses to the environment from the combustion chamber and catalyst bed are considered. The influence of the main operating variables (e.g., steam-to-carbon ratio, CO2- to-carbon ratio) on the reactor performance is studied. The proposed mathematical has been checked successfully against data available in the open literature for dual-product (H2+CO) plants.2- to-carbon ratio) on the reactor performance is studied. The proposed mathematical has been checked successfully against data available in the open literature for dual-product (H2+CO) plants.