The coupled microfluidic microbial electrochemical cell as a self-powered biohydrogen generator

Fadakar, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jpowsour.2020.227817
  3. Publisher: Elsevier B.V , 2020
  4. Abstract:
  5. Due to the importance of hydrogen as an effective antioxidant for its applications in therapy, this research reports the fabrication of a coupled microfluidic microbial electrochemical cell (MXC), including microfluidic microbial fuel cells (MFCs) and a microfluidic microbial electrolysis cell (MEC) series in order to perform it as a self-powered biohydrogen generator. Being able to be a platform of implantable medical devices, utilization a non-phatogenic strain of Escherichia coli as the biocatalyst in order to exploit the embodied energy from human blood and excrement and finally the use of cheap and facile materials (<$2 per device) are the exceptional features of the system. The sustainable potential difference for a series of three microfluidic MFCs is 1.97 V, and is high and sufficient for hydrolyzing an organic substrate. The single cell has a capability for producing the maximum power density of 20 W m−3 and the three cells series connection achieve as 38.2 W m−3 as the highest collective power. The maximum hydrogen production rate of 46 and 28 ppm h−1 obtain for glucose and urea-based substrates, respectively. The coupled microfluidic MXC performance characterize based on its substrate type, concentration, flow rate as well as comparison with other conventional MECs. © 2020 Elsevier B.V
  6. Keywords:
  7. Biohydrogen ; Escherichia coli ; Self-powered microbial electrochemical cell ; Spiral microchannel ; Electrochemical cells ; Hydrogen production ; Microfluidics ; Regenerative fuel cells ; Substrates ; Urea ; Bio-hydrogen ; Hydrogen production rate ; Implantable medical devices ; Maximum power density ; Microbial fuel cells (MFCs) ; Potential difference ; Self-powered ; Series connections ; Microbial fuel cells
  8. Source: Journal of Power Sources ; Volume 451 , 2020
  9. URL: https://www.sciencedirect.com/science/article/pii/S0378775320301208