The objective of this study is to analyze the steam reforming system using numerical method. The system consists of a cylindrical-type steam reformer and a combustion burner. Heat is supplied to the endothermic steam reformer by the combustion gases which flow around the reformer. Eddy Break-Up (EBU) model is incorporated for the combustion reaction, and pseudo-homogeneous model is used for the steam reforming reaction. The temperature at the reformer center and the concentration of species at the outlet are compared with the measured data for code validation. The correlation between the performances and the shapes of the system has been studied by using two different configurations. One has the flame guide between the combustion burner and the steam reformer, and the other does not. The flame guide makes the flow of the combustion gas changed. The operating parameters are reactant flow rates which are supplied to the steam reformer and the combustion burner. Reactor temperature profiles, heat transfer rates, fuel conversion, and the hydrogen yields are calculated as the numerical results. Moreover, fuel feed ratio between the burner and the reformer is also manipulated as an operating parameter to discuss about efficiency.

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