1
|
Khodaparastasgarabad N, Sonawane JM, Baghernavehsi H, Gong L, Liu L, Greener J. Microfluidic membraneless microbial fuel cells: new protocols for record power densities. LAB ON A CHIP 2023; 23:4201-4212. [PMID: 37702583 DOI: 10.1039/d3lc00387f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
The main hurdle in leveraging microfluidic advantages in membraneless MFCs is their low electrode area-normalized power. For nearly a decade, maximum power densities have remained stagnant, while at the same time macrosystems continue to gather pace. To bridge this growing gap, we showcase a strategy that focuses on (i) technology improvements, (ii) establishment of record areal power densities, and (iii) presentation of different normalization methods that complement areal power densities and enable direct comparisons across all MFC scales. Using a pure-culture Geobacter sulfurreducens electroactive biofilm (EAB) in a new membraneless MFC that adheres to the strategy above, we observed optimal anode colonization, resulting in the highest recorded electrode areal power density for a microfluidic MFC of 3.88 W m-2 (24.37 kW m-3). We also consider new power normalization methods that may be more appropriate for comparison to other works. Normalized by the wetted cross-section area between electrodes accounts for constraints in electrode/electrolyte contact, resulting in power densities as high as 8.08 W m-2. Alternatively, we present a method to normalize by the flow rate to account for acetate supply, obtaining normalized energy recovery values of 0.025 kW h m-3. With these results, the performance gap between micro- and macroscale MFCs is closed, and a road map to move forward is presented.
Collapse
Affiliation(s)
| | - Jayesh M Sonawane
- Département de Chimie, Faculté des sciences et de génie, Université Laval, Québec City, QC, Canada.
| | - Haleh Baghernavehsi
- Département de Chimie, Faculté des sciences et de génie, Université Laval, Québec City, QC, Canada.
| | - Lingling Gong
- Département de Chimie, Faculté des sciences et de génie, Université Laval, Québec City, QC, Canada.
| | - Linlin Liu
- Département de Chimie, Faculté des sciences et de génie, Université Laval, Québec City, QC, Canada.
| | - Jesse Greener
- Département de Chimie, Faculté des sciences et de génie, Université Laval, Québec City, QC, Canada.
- CHU de Québec, Centre de recherche, Université Laval, 10 rue de l'Espinay, Québec, QC, Canada
| |
Collapse
|
2
|
Amirdehi MA, Gong L, Khodaparastasgarabad N, Sonawane JM, Logan BE, Greener J. Hydrodynamic interventions and measurement protocols to quantify and mitigate power overshoot in microbial fuel cells using microfluidics. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
3
|
The Effect of Wall Shear Stress on Two Phase Fluctuating Flow of Dusty Fluids by Using Light Hill Technique. WATER 2021. [DOI: 10.3390/w13111587] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Due to the importance of wall shear stress effect and dust fluid in daily life fluid problems. This paper aims to discover the influence of wall shear stress on dust fluids of fluctuating flow. The flow is considered between two parallel plates that are non-conducting. Due to the transformation of heat, the fluid flow is generated. We consider every dust particle having spherical uniformly disperse in the base fluid. The perturb solution is obtained by applying the Poincare-Lighthill perturbation technique (PLPT). The fluid velocity and shear stress are discussed for the different parameters like Grashof number, magnetic parameter, radiation parameter, and dusty fluid parameter. Graphical results for fluid and dust particles are plotted through Mathcad-15. The behavior of base fluid and dusty fluid is matching for different embedded parameters.
Collapse
|