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Microfluidics-based pH-differential reactor for CO2 utilization: A mathematical study

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  • Lu, Xu
  • Leung, Dennis Y.C.
  • Wang, Huizhi
  • Xuan, Jin

Abstract

This paper reports a mathematical model for calculating various losses in a pH differential microfluidic electrolytic cell (PMEC) for CO2 to formic acid conversion. The microfluidic characteristics of the cell were examined, and in respect of electro-chemical equilibrium states, major limiting factors such as mass transfer constraints, kinetic losses and overpotentials, were considered and acid–base interface and neutralisation losses therein identified. Losses of electrical resistance on electrodes and within micro-channels were quantified, and computational results were validated against previous experimental data. To the best of our knowledge, the model is the first for determining dual electrolyte arrangements and associated losses and can be used to develop parametric optimisation strategies.

Suggested Citation

  • Lu, Xu & Leung, Dennis Y.C. & Wang, Huizhi & Xuan, Jin, 2018. "Microfluidics-based pH-differential reactor for CO2 utilization: A mathematical study," Applied Energy, Elsevier, vol. 227(C), pages 525-532.
    • Handle: RePEc:eee:appene:v:227:y:2018:i:c:p:525-532
    DOI: 10.1016/j.apenergy.2017.08.191
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    References listed on IDEAS

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    1. Cheng, Ya-Hsin & Nguyen, Van-Huy & Chan, Hsiang-Yu & Wu, Jeffrey C.S. & Wang, Wei-Hon, 2015. "Photo-enhanced hydrogenation of CO2 to mimic photosynthesis by CO co-feed in a novel twin reactor," Applied Energy, Elsevier, vol. 147(C), pages 318-324.
    2. Wang, Huizhi & Leung, Dennis Y.C. & Xuan, Jin, 2013. "Modeling of a microfluidic electrochemical cell for CO2 utilization and fuel production," Applied Energy, Elsevier, vol. 102(C), pages 1057-1062.
    3. Lu, Xu & Leung, Dennis Y.C. & Wang, Huizhi & Maroto-Valer, M. Mercedes & Xuan, Jin, 2016. "A pH-differential dual-electrolyte microfluidic electrochemical cells for CO2 utilization," Renewable Energy, Elsevier, vol. 95(C), pages 277-285.
    4. Xu, Hong & Zhang, Hao & Wang, Huizhi & Leung, Dennis Y.C. & Zhang, Li & Cao, Jun & Jiao, Kui & Xuan, Jin, 2015. "Counter-flow formic acid microfluidic fuel cell with high fuel utilization exceeding 90%," Applied Energy, Elsevier, vol. 160(C), pages 930-936.
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    1. Tufa, Ramato Ashu & Chanda, Debabrata & Ma, Ming & Aili, David & Demissie, Taye Beyene & Vaes, Jan & Li, Qingfeng & Liu, Shanhu & Pant, Deepak, 2020. "Towards highly efficient electrochemical CO2 reduction: Cell designs, membranes and electrocatalysts," Applied Energy, Elsevier, vol. 277(C).

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