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Heat Transfer and Reaction Characteristics of Steam Methane Reforming in a Novel Composite Packed Bed Microreactor for Distributed Hydrogen Production

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Listed:
  • Jingyu Wang

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Zongxin Liu

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Changfa Ji

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Lang Liu

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China)

Abstract

The development of efficient and compact reactors is an urgent need in the field of distributed hydrogen production. Steam reforming of methane is the main method to produce hydrogen. Aiming at the problems of high heat and mass transfer resistance of the existing fixed bed reactors, and the difficulty of replacing the wall-coated catalyst in the microreactors, a composite packed bed was proposed to meet the demand of small-scale hydrogen production. The structure consists of a multi-channel framework with high thermal conductivity, which is filled with Ni/Al 2 O 3 catalyst particles in each channel. A three-dimensional numerical model of the steam methane reforming process in the novel reactor was established using ANSYS FLUENT software. The heat transfer and reaction characteristics in the reactor were studied. Firstly, the advantages of the multi-channel skeleton in enhancing the radial heat transfer performance were verified by comparing it with the traditional randomly packed bed without the channel skeleton. Secondly, the influences of inlet velocity, inlet temperature, and heating wall temperature on the heat transfer and reaction performances in the reactor were studied, and a sensitivity factor was adopted to do the sensitivity analysis. The results show that the methane conversion rate is most sensitive to the wall temperature, while the inlet velocity and inlet temperature have less effect. Finally, the effects of two skeleton materials were studied. The results show that when the wall temperature is higher than 1200 K, there is no significant difference between these two reactors, which indicates that the use of cordierite with a lower price, but also with a lower thermal conductivity can significantly reduce the reactor’s cost. The conclusions can be used as a reference for the design of small-scale hydrogen production reactors.

Suggested Citation

  • Jingyu Wang & Zongxin Liu & Changfa Ji & Lang Liu, 2023. "Heat Transfer and Reaction Characteristics of Steam Methane Reforming in a Novel Composite Packed Bed Microreactor for Distributed Hydrogen Production," Energies, MDPI, vol. 16(11), pages 1-14, May.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4347-:d:1156487
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    References listed on IDEAS

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    1. Tang, Xin-Yuan & Yang, Wei-Wei & Ma, Xu & Cao, Xiangkun Elvis, 2023. "An integrated modeling method for membrane reactors and optimization study of operating conditions," Energy, Elsevier, vol. 268(C).
    2. Wang, Jingyu & Yang, Jian & Cheng, Zhilong & Liu, Yan & Chen, Yitung & Wang, Qiuwang, 2018. "Experimental and numerical study on pressure drop and heat transfer performance of grille-sphere composite structured packed bed," Applied Energy, Elsevier, vol. 227(C), pages 719-730.
    3. Gu, Rong & Ding, Jing & Wang, Yarong & Yuan, Qinquan & Wang, Weilong & Lu, Jianfeng, 2019. "Heat transfer and storage performance of steam methane reforming in tubular reactor with focused solar simulator," Applied Energy, Elsevier, vol. 233, pages 789-801.
    4. Zhang, Haotian & Sun, Zhuxing & Hu, Yun Hang, 2021. "Steam reforming of methane: Current states of catalyst design and process upgrading," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).
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    Cited by:

    1. Bożena Łosiewicz, 2024. "Technology for Green Hydrogen Production: Desk Analysis," Energies, MDPI, vol. 17(17), pages 1-41, September.
    2. Mattia Boscherini & Alba Storione & Matteo Minelli & Francesco Miccio & Ferruccio Doghieri, 2023. "New Perspectives on Catalytic Hydrogen Production by the Reforming, Partial Oxidation and Decomposition of Methane and Biogas," Energies, MDPI, vol. 16(17), pages 1-33, September.

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