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Confined small-sized cobalt catalysts stimulate carbon-chain growth reversely by modifying ASF law of Fischer–Tropsch synthesis

Author

Listed:
  • Qingpeng Cheng

    (Tianjin University)

  • Ye Tian

    (Tianjin University)

  • Shuaishuai Lyu

    (Tianjin University)

  • Na Zhao

    (Tianjin University)

  • Kui Ma

    (Tianjin University)

  • Tong Ding

    (Tianjin University)

  • Zheng Jiang

    (Chinese Academy of Sciences)

  • Lihua Wang

    (Chinese Academy of Sciences)

  • Jing Zhang

    (Chinese Academy of Sciences)

  • Lirong Zheng

    (Chinese Academy of Sciences)

  • Fei Gao

    (Nanjing University)

  • Lin Dong

    (Nanjing University)

  • Noritatsu Tsubaki

    (University of Toyama)

  • Xingang Li

    (Tianjin University)

Abstract

Fischer–Tropsch synthesis (FTS) is a promising technology to convert syngas derived from non-petroleum-based resources to valuable chemicals or fuels. Selectively producing target products will bring great economic benefits, but unfortunately it is theoretically limited by Anderson–Schulz–Flory (ASF) law. Herein, we synthesize size-uniformed cobalt nanocrystals embedded into mesoporous SiO2 supports, which is likely the structure of water-melon seeds inside pulps. We successfully tune the selectivity of products from diesel-range hydrocarbons (66.2%) to gasoline-range hydrocarbons (62.4%) by controlling the crystallite sizes of confined cobalt from 7.2 to 11.4 nm, and modify the ASF law. Generally, larger Co crystallites increase carbon-chain growth, producing heavier hydrocarbons. But here, we interestingly observe a reverse phenomenon: the uniformly small-sized cobalt crystallites can strongly adsorb active C* species, and the confined structure will inhibit aggregation of cobalt crystallites and escape of reaction intermediates in FTS, inducing the higher selectivity towards heavier hydrocarbons.

Suggested Citation

  • Qingpeng Cheng & Ye Tian & Shuaishuai Lyu & Na Zhao & Kui Ma & Tong Ding & Zheng Jiang & Lihua Wang & Jing Zhang & Lirong Zheng & Fei Gao & Lin Dong & Noritatsu Tsubaki & Xingang Li, 2018. "Confined small-sized cobalt catalysts stimulate carbon-chain growth reversely by modifying ASF law of Fischer–Tropsch synthesis," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05755-8
    DOI: 10.1038/s41467-018-05755-8
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    Cited by:

    1. Zhou, Jianli & Wu, Yunna & Tao, Yao & Gao, Jianwei & Zhong, Zhiming & Xu, Chuanbo, 2021. "Geographic information big data-driven two-stage optimization model for location decision of hydrogen refueling stations: An empirical study in China," Energy, Elsevier, vol. 225(C).
    2. Song, Wenjing & Song, Mengxue & Cai, Wenqing & Li, Weichu & Jiang, Xingmao & Fang, Weiping & Lai, Weikun, 2022. "Efficient and stable SiO2-encapsulated NiPt/HY catalyst for catalytic cracking of β-O-4 linkage compound," Renewable Energy, Elsevier, vol. 198(C), pages 334-342.

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