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Low-Rank Coal Supported Ni Catalysts for CO 2 Methanation

Author

Listed:
  • Soohyun Kim

    (Find Dust Research Department, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Yunxia Yang

    (CSIRO Energy, 71 Normanby Rd., Clayton North, VIC 3169, Australia)

  • Renata Lippi

    (CSIRO Energy, 71 Normanby Rd., Clayton North, VIC 3169, Australia
    Australian Synchrotron (ANSTO), 800 Blackburn Rd., Clayton, VIC 3168, Australia)

  • Hokyung Choi

    (Find Dust Research Department, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Sangdo Kim

    (Find Dust Research Department, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Donghyuk Chun

    (Find Dust Research Department, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Hyuk Im

    (Find Dust Research Department, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Sihyun Lee

    (Find Dust Research Department, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Jiho Yoo

    (Find Dust Research Department, Korea Institute of Energy Research, Daejeon 34129, Korea)

Abstract

As renewable energy source integration increases, P2G technology that can store surplus renewable power as methane is expected to expand. The development of a CO 2 methanation catalyst, one of the core processes of the P2G concept, is being actively conducted. In this work, low-rank coal (LRC) was used as a catalyst support for CO 2 methanation, as it can potentially enhance the diffusion and adsorption behavior by easily controlling the pore structure and composition. It can also improve the process efficiency owing to its simplicity (no pre-reduction step) and high thermal conductivity, compared to conventional metal oxide-supported catalysts. A screening of single metals (Ni, Co, Ru, Rh, and Pd) on LRC was performed, which showed that Ni was the most active. When Ni on the LRC catalyst was doped with a promoter (Ce and Mg), the CO 2 conversion percentage increased by >10% compared to that of the single Ni catalyst. When the CO 2 methanation activity was compared at 250–500 °C, the Ce-doped Ni/Eco and Mg-doped Ni/Eco catalysts showed similar or better activity than the commercial metal oxide-supported catalyst. In addition, the catalytic performance remained stable even after the test for an extended time (~200 h). The results of XRD, TEM, and TPR showed that highly efficient LRC-based CO 2 methanation catalysts can be made when the metal dispersion and composition are modified.

Suggested Citation

  • Soohyun Kim & Yunxia Yang & Renata Lippi & Hokyung Choi & Sangdo Kim & Donghyuk Chun & Hyuk Im & Sihyun Lee & Jiho Yoo, 2021. "Low-Rank Coal Supported Ni Catalysts for CO 2 Methanation," Energies, MDPI, vol. 14(8), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2040-:d:531534
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    References listed on IDEAS

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    1. Qinglin Wu & Meidie Pan & Shikai Zhang & Dongpeng Sun & Yang Yang & Dong Chen & David A. Weitz & Xiang Gao, 2022. "Research Progress in High-Throughput Screening of CO 2 Reduction Catalysts," Energies, MDPI, vol. 15(18), pages 1-18, September.

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