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Variation with time of cell voltage for coal slurry electrolysis in sulfuric acid

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  • Gong, Xuzhong
  • Wang, Mingyong
  • Liu, Yang
  • Wang, Zhi
  • Guo, Zhancheng

Abstract

To explain the time dependence of cell voltage in CWS (coal water slurry) electrolysis, the effects of three coal types along with graphite, CWS concentration and catalysts on cell voltage are examined. Results show that the overall cell voltage for CWS electrolysis is lowered as coal rank decreases. The four overall types carbonaceous material show successive reductions in Uθ + η for CWS electrolysis which are greater than those of iR, where Uθ is the theoretical reversible potential for water electrolysis, and η is the sum of the anodic and cathodic over-potentials. The cell voltage for DLWS(demineralized lignite water slurry ) electrolysis is lowered by addition of Fe2+ or Fe3+ ions, the former being more effective. The cell voltage for DBWS (demineralized bituminous water slurry) electrolysis decreases with the addition of transition metal ions in the order Fe2+

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:65:y:2014:i:c:p:233-239
    DOI: 10.1016/j.energy.2013.11.083
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    1. Santos, D.M.F. & Šljukić, B. & Sequeira, C.A.C. & Macciò, D. & Saccone, A. & Figueiredo, J.L., 2013. "Electrocatalytic approach for the efficiency increase of electrolytic hydrogen production: Proof-of-concept using platinum--dysprosium alloys," Energy, Elsevier, vol. 50(C), pages 486-492.
    2. Mbah, Jonathan & Weaver, Eric & Srinivasan, Sesha & Krakow, Burton & Wolan, John & Goswami, Yogi & Stefanakos, Elias, 2010. "Low voltage H2O electrolysis for enhanced hydrogen production," Energy, Elsevier, vol. 35(12), pages 5008-5012.
    3. Wu, Liang & He, Yuehui & Lei, Ting & Nan, Bo & Xu, Nanping & Zou, Jin & Huang, Baiyun & Liu, C.T., 2013. "Characterization of the porous Ni3Al–Mo electrodes during hydrogen generation from alkaline water electrolysis," Energy, Elsevier, vol. 63(C), pages 216-224.
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    Cited by:

    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. 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).
    3. 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).
    4. 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).
    5. 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.
    6. 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).
    7. 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.

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