Investigation of hydrogen production process by partial oxidation of natural gas in a large non-catalytic Reformer and comparison with methane reforming process in small catalytic Reformer

In the first part of this research, non-catalytic natural gas converter is analyzed numerically. The GRI-1.2 mechanism, which includes 177 basic chemical reactions, is used to calculate the reaction rate in natural gas oxidation processes. The EDC waste loss model is used to model combustion. Due to the fact that the calculations have been done for a very large natural gas converter, a symmetric axial model is used to reduce the computational costs. The results of the first phase of the study show that increasing the pressure increases the conversion of CH4 to hydrogen, but from a pressure of 3 MPa and above, the amount of hydrogen production remains almost constant. In addition, with increasing the ratio of water vapor to natural gas, the maximum flame temperature in the converter decreases and the molar fraction of H2 / CO in the output increases. In the second part of the research, a stable three-dimensional heterogeneous numerical model for studying the methane vapor vapor reforming process is investigated. The results show that by increasing the inlet temperature of heating pipes, the CH4 / H2O ratio increases to about 0.25 and the number of methane heat supply pipes increases. Also, by comparing the results of this simulation and the existing experimental research in this field, the results of this study can be used for the development of industrial.