Modeling and simulation of steam methane reforming and methane combustion over continuous and segmented catalyst beds in autothermal reactor |
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Affiliation: | 1. School of Chemical Engineering and Materials Science, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul, 06980, Republic of Korea;2. Mechanical Engineering Department, Faculty of Engineering, Gazi University, Ankara, Turkey;3. Laboratory of Multiphase Transport and Porous Media (LTPMP), Faculty of Mechanical Engineering and Process Engineering, University of Sciences and Technology Houari Boumediene, BP. 32, El Alia 16111, Algiers, Algeria;4. Sen Research Group, Department of Biochemistry, Faculty of Art and Science, Dumlupinar University, 43000, Turkey;5. Purdue University, 401 N Grant Street, West Lafayette, IN 47907, USA |
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Abstract: | In this paper, a numerical analysis of the production of hydrogen via autothermal (ATR) steam methane reforming (SMR) is presented. The combustion reaction occurs over a Pt/Al2O3 catalyst, and the reforming reaction is operated using a Ni/Al2O3 catalyst inside the same cylindrical channel. A novel configuration with18 catalytic-bed macro-patterns alternately mounted, referred to as SDB, is designed and compared with the catalytic dual-bed reactor (conventional configuration), referred to as CDB, at the same operating temperature and pressure conditions of 900 °C and 14 bars, respectively. The results showed that hydrogen yield was improved by 4.5% compared to the conventional configuration, while a decrease of 67 °C of the highest temperature was noticed. Meanwhile, the methane conversion was 63.73% and 65.44% for the CDB and SDB configurations, respectively. Furthermore, the length of the reactor can be decreased by 27%, keeping the same hydrogen yield at the outlet of the conventional reactor, indicating a potential reduction in hydrogen cost. |
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Keywords: | Methane oxidation Hydrogen production Numerical analysis Methane reformer Catalyst bed patterns Computational fluid dynamics CFD |
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