IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v226y2021ics0360544221004928.html
   My bibliography  Save this article

Mechanism investigation of carboxyl functional groups catalytic oxidation in coal assisted water electrolysis cell

Author

Listed:
  • Kou, Kaikai
  • Zhou, Wei
  • Chen, Shuai
  • Gao, Jihui

Abstract

The electric energy consumption for H2 production can be significantly reduced by integrating chemical energy of coal in the coal assisted water electrolysis (CAWE) process. While the oxidation mechanism of coal has not been comprehensively demonstrated. In this work, the oxidation mechanism of carboxyl group, a typical oxygen-functional group of coal, was systematically investigated by preparing a model compound of carboxylated graphene. For direct oxidation of carboxylated graphene (GCM), the onset potential was close to 1.2 V at ambient temperature. The apparent activation energy for hydrogen production was dramatically diminished by electrolysis of GCM slurry. The products analysis indicated that carboxyl groups can be oxidized to CO and CO2 at 90 °C around 1.6 V Fe3+ was sufficient to oxidize carboxyl groups to generate Fe2+ at 90 °C. The chemical oxidation of carboxyl groups was a first-order reaction accompanied by adsorption, oxidization and desorption stages. In the presence of Fe2+/Fe3+, electrolysis initiated at about 0.5 V. A gentle slope of voltage from 0.6 V to 1.2 V was observed in the continuous electrolysis and the regeneration of Fe2+ became the limiting step for a long period of time. The results are essential to guide the application of CAWE.

Suggested Citation

  • Kou, Kaikai & Zhou, Wei & Chen, Shuai & Gao, Jihui, 2021. "Mechanism investigation of carboxyl functional groups catalytic oxidation in coal assisted water electrolysis cell," Energy, Elsevier, vol. 226(C).
    • Handle: RePEc:eee:energy:v:226:y:2021:i:c:s0360544221004928
    DOI: 10.1016/j.energy.2021.120243
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544221004928
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2021.120243?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Chen, Shuai & Zhou, Wei & Ding, Yani & Zhao, Guangbo & Gao, Jihui, 2021. "Fe3+-mediated coal-assisted water electrolysis for hydrogen production: Roles of mineral matter and oxygen-containing functional groups in coal," Energy, Elsevier, vol. 220(C).
    2. Gong, Xuzhong & Wang, Mingyong & Liu, Yang & Wang, Zhi & Guo, Zhancheng, 2014. "Variation with time of cell voltage for coal slurry electrolysis in sulfuric acid," Energy, Elsevier, vol. 65(C), pages 233-239.
    3. Ge, Lan & Gong, Xuzhong & Wang, Zhi & Zhao, Lixin & Wang, Yuhua & Wang, Mingyong, 2016. "Insight of anode reaction for CWS (coal water slurry) electrolysis for hydrogen production," Energy, Elsevier, vol. 96(C), pages 372-382.
    4. Sonibare, Oluwadayo O. & Haeger, Tobias & Foley, Stephen F., 2010. "Structural characterization of Nigerian coals by X-ray diffraction, Raman and FTIR spectroscopy," Energy, Elsevier, vol. 35(12), pages 5347-5353.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ying, Zhi & Geng, Zhen & Zheng, Xiaoyuan & Dou, Binlin & Cui, Guomin, 2022. "Improving water electrolysis assisted by anodic biochar oxidation for clean hydrogen production," Energy, Elsevier, vol. 238(PB).
    2. Huang, Yuming & Zhou, Wei & Xie, Liang & Li, Jiayi & He, Yong & Chen, Shuai & Meng, Xiaoxiao & Gao, Jihui & Qin, Yukun, 2022. "Edge and defect sites in porous activated coke enable highly efficient carbon-assisted water electrolysis for energy-saving hydrogen production," Renewable Energy, Elsevier, vol. 195(C), pages 283-292.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Fan, Yuqiang & Guan, Jun & He, Demin & Hong, Yu & Zhang, Qiumin, 2023. "The influence of inherent minerals on the constant-current electrolysis process of coal-water slurry," Energy, Elsevier, vol. 285(C).
    2. Zhou, Wei & Chen, Shuai & Meng, Xiaoxiao & Li, Jiayi & Huang, Yuming & Gao, Jihui & Zhao, Guangbo & He, Yong & Qin, Yukun, 2022. "Two-step coal-assisted water electrolysis for energy-saving hydrogen production at cell voltage of 1.2 V with current densities larger than 150 mA/cm2," Energy, Elsevier, vol. 260(C).
    3. Ying, Zhi & Geng, Zhen & Zheng, Xiaoyuan & Dou, Binlin & Cui, Guomin, 2022. "Improving water electrolysis assisted by anodic biochar oxidation for clean hydrogen production," Energy, Elsevier, vol. 238(PB).
    4. Ju, HyungKuk & Badwal, Sukhvinder & Giddey, Sarbjit, 2018. "A comprehensive review of carbon and hydrocarbon assisted water electrolysis for hydrogen production," Applied Energy, Elsevier, vol. 231(C), pages 502-533.
    5. Hu, Bo & Xu, Lianfei & Li, Yang & Sun, Fei & Wang, Zhuozhi & Yang, Mengchi & Zhang, Yangyang & Kong, Wenwen & Shen, Boxiong & Wang, Xin & Yang, Jiancheng, 2024. "Biochar and Fe2+ mediation in hydrogen production by water electrolysis: Effects of physicochemical properties of biochars," Energy, Elsevier, vol. 297(C).
    6. Chen, Shuai & Zhou, Wei & Ding, Yani & Zhao, Guangbo & Gao, Jihui, 2021. "Fe3+-mediated coal-assisted water electrolysis for hydrogen production: Roles of mineral matter and oxygen-containing functional groups in coal," Energy, Elsevier, vol. 220(C).
    7. Zhang, Chao & Zhao, Yangsheng & Feng, Zijun & Wang, Lei & Meng, Qiaorong & Lu, Yang & Gao, Qiang, 2023. "Comparative study on the chemical structure characteristics of lump coal during superheated water vapor pyrolysis and conventional pyrolysis," Energy, Elsevier, vol. 276(C).
    8. Huang, Yuming & Zhou, Wei & Xie, Liang & Li, Jiayi & He, Yong & Chen, Shuai & Meng, Xiaoxiao & Gao, Jihui & Qin, Yukun, 2022. "Edge and defect sites in porous activated coke enable highly efficient carbon-assisted water electrolysis for energy-saving hydrogen production," Renewable Energy, Elsevier, vol. 195(C), pages 283-292.
    9. Gu, Suqian & Xu, Zhiqiang & Ren, Yangguang & Tu, Yanan & Sun, Meijie & Liu, Xiangyang, 2021. "An approach for upgrading lignite to improve slurryability: Blending with direct coal liquefaction residue under microwave-assisted pyrolysis," Energy, Elsevier, vol. 222(C).
    10. Wendi Sun & Li Bai & Mingshu Chi & Xiuling Xu & Zhao Chen & Kecheng Yu, 2023. "Study on the Evolution Pattern of the Aromatics of Lignin during Hydrothermal Carbonization," Energies, MDPI, vol. 16(3), pages 1-14, January.
    11. Zhang, Wenda & Sun, Shaozeng & Zhao, Yijun & Zhao, Zujie & Wang, Pengxiang & Feng, Dongdong & Li, Pengfei, 2020. "Effects of total pressure and CO2 partial pressure on the physicochemical properties and reactivity of pressurized coal char produced at rapid heating rate," Energy, Elsevier, vol. 208(C).
    12. Abunowara, Mustafa & Sufian, Suriati & Bustam, Mohamad Azmi & Eldemerdash, Usama & Suleman, Humbul & Bencini, Roberto & Assiri, Mohammed Ali & Ullah, Sami & Al-Sehemi, Abdullah G., 2020. "Experimental measurements of carbon dioxide, methane and nitrogen high-pressure adsorption properties onto Malaysian coals under various conditions," Energy, Elsevier, vol. 210(C).
    13. Zhu, Wenkun & Li, Xiaohui & Sun, Rui & Cao, Zhen & Yuan, Mengfan & Sun, Liutao & Yu, Xin & Wu, Jiangquan, 2022. "Investigation of the CN and C2 emission characteristics and microstructural evolution of coal to char using laser-induced breakdown spectroscopy and Raman spectroscopy," Energy, Elsevier, vol. 240(C).
    14. Liu, Hongwei & Wang, Yongzhen & Lv, Liang & Liu, Xiao & Wang, Ziqi & Liu, Jun, 2023. "Oxygen-enriched hierarchical porous carbons derived from lignite for high-performance supercapacitors," Energy, Elsevier, vol. 269(C).
    15. Li, Jiuqing & Qin, Yong & Shen, Jian & Chen, Yilin, 2024. "Evolution of carbon nanostructures during coal graphitization: Insights from X-ray diffraction and high-resolution transmission electron microscopy," Energy, Elsevier, vol. 290(C).
    16. Huang, Jiliang & Tan, Bo & Gao, Liyang & Fan, Long & Shao, Zhuangzhuang & Wang, Haiyan & Qi, Qingjie, 2024. "Study on the evolution characteristics of molecular surface active sites of low-rank coal in low-temperature oxidation stage," Energy, Elsevier, vol. 294(C).
    17. Prabhakaran, SP Sathiya & Swaminathan, Ganapathiraman & Joshi, Viraj V., 2022. "Combustion and pyrolysis kinetics of Australian lignite coal and validation by artificial neural networks," Energy, Elsevier, vol. 242(C).
    18. Miao, Guodong & Li, Zenghua & Yang, Jingjing & Yang, Yongliang & Liu, Hao, 2023. "Microstructure evolution and higher-molecular-weight gas emission during the low temperature oxidation of coal," Energy, Elsevier, vol. 282(C).
    19. Kou, Mingyin & Zuo, Haibin & Ning, Xiaojun & Wang, Guangwei & Hong, Zhibin & Xu, Haifa & Wu, Shengli, 2019. "Thermogravimetric study on gasification kinetics of hydropyrolysis char derived from low rank coal," Energy, Elsevier, vol. 188(C).
    20. Zhai, Xiaowei & Ge, Hui & Wang, Tingyan & Shu, Chi-Min & Li, Jun, 2020. "Effect of water immersion on active functional groups and characteristic temperatures of bituminous coal," Energy, Elsevier, vol. 205(C).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:226:y:2021:i:c:s0360544221004928. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.