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Retraction published on 10 July 2019, see Processes 2019, 7(7), 435.
Article

Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, China
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Author to whom correspondence should be addressed.
Processes 2018, 6(7), 83; https://doi.org/10.3390/pr6070083
Received: 27 May 2018 / Revised: 28 June 2018 / Accepted: 29 June 2018 / Published: 30 June 2018
This paper addresses the issues related to the favorable operating conditions for the small-scale production of synthesis gas from the catalytic partial oxidation of methane over rhodium. Numerical simulations were performed by means of computational fluid dynamics to explore the key factors influencing the yield of synthesis gas. The effect of mixture composition, pressure, preheating temperature, and reactor dimension was evaluated to identify conditions that favor a high yield of synthesis gas. The relative importance of heterogeneous and homogenous reaction pathways in determining the distribution of reaction products was investigated. The results indicated that there is competition between the partial and total oxidation reactions occurring in the system, which is responsible for the distribution of reaction products. The contribution of heterogeneous and homogeneous reaction pathways depends upon process conditions. The temperature and pressure play an important role in determining the fuel conversion and the synthesis gas yield. Undesired homogeneous reactions are favored in large reactors, and at high temperatures and pressures, whereas desired heterogeneous reactions are favored in small reactors, and at low temperatures and pressures. At atmospheric pressure, the selectivity to synthesis gas is higher than 98% at preheating temperatures above 900 K when oxygen is used as the oxidant. At pressures below 1.0 MPa, alteration of the dimension in the range of 0.3 and 1.5 mm does not result in significant difference in reactor performance, if made at constant inlet flow velocities. Air shows great promise as the oxidant, especially at industrially relevant pressure 3.0 MPa, thereby effectively inhibiting the initiation of undesired homogeneous reactions. View Full-Text
Keywords: catalytic microreactors; synthesis gas production; partial oxidation; microchannel reactors; reactor design; reaction pathway; hydrogen production; computational fluid dynamics catalytic microreactors; synthesis gas production; partial oxidation; microchannel reactors; reactor design; reaction pathway; hydrogen production; computational fluid dynamics
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MDPI and ACS Style

Chen, J.; Song, W.; Xu, D. Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production. Processes 2018, 6, 83. https://doi.org/10.3390/pr6070083

AMA Style

Chen J, Song W, Xu D. Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production. Processes. 2018; 6(7):83. https://doi.org/10.3390/pr6070083

Chicago/Turabian Style

Chen, Junjie, Wenya Song, and Deguang Xu. 2018. "Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production" Processes 6, no. 7: 83. https://doi.org/10.3390/pr6070083

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