Numerical Investigation of the Performance of Hydrogen Production Process by Production Gas Recirculation

Document Type : Research Article

Authors

1 University of Birjand

2 Department of Mechanical Engineering, Faculty of Engineering, University of Birjand

Abstract

Clean energy sources such as hydrogen are developing because of environmental issues. Partial oxidation of methane is important among different methods of hydrogen production due to the reduction in carbon deposition, doing the process in a lower temperature range, the high conversion of methane and low energy consumption. In the present work, the numerical simulation of partial oxidation of methane with Rh/Al2O3 catalyst is conducted in a fixed bed flow reactor. The effect of different volumetric percentages of product gas recirculation on the hydrogen, carbon monoxide, and carbon dioxide production is calculated for various temperatures (500-900°C) and oxygen to methane ratios equal 0.4, 0.5, 0.6 and 0.7, respectively. According to that, the suitable temperature and oxygen to methane ratio are considered. The results show that in the temperature range, an increase in the product gas recirculation causes an increase in Hydrogen and CO production and a decrease in CO2 production. Moreover, the calculated data shows that the inlet oxygen to methane ratio of 0.5 and reaction temperature of 600°C is suitable to enhance Hydrogen production performance by production gas recirculation. Also, it is demonstrated that 50% volumetric product gas recirculation in that temperature and O2/CH4 ratio, leads to an increase in H2 production and a decrease in CO2 production about 30%.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 53, Issue 1 (Special Issue)
April 2021
Pages 623-638

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