Constructed mathematical model for nanowire electron transfer in microbial fuel cells

Lan, Tzu‐Hsuan; Wang, Chin‐Tsan; Sangeetha, T.; Yang, Yaxiong; Garg, Akhil

doi:10.1016/j.jpowsour.2018.09.074

Cited by 18 publications

(8 citation statements)

References 23 publications

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“…A maximum cell voltage at 200 mA cm −2 was obtained at the KOH concentration of 40 wt%, but further increase in the electrolyte concentration reduced the cell voltage. The relationship between the electrolyte concentration and power output can be better explained by the Nernst equation which indicates the affiliation between the reversible potential (E 0 ) of electrochemical reaction, temperature, derive current density and standard potentials [17,18].…”

Section: Concentration Of Electrolyte 176mentioning

confidence: 99%

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

et al. 2019

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Zinc (Zn)-air fuel cells (ZAFC) are a widely-acknowledged type of metal air fuel cells, but optimization of several operational parameters and components will facilitate enhanced power performance. This research study has been focused on the investigation of ZAFC Zn particle fuel with flowing potassium hydroxide (KOH) electrolyte. Parameters like optimum electrolyte concentration, temperature, and flow velocity were optimized. Moreover, ZAFC components like anode current collector and cathode conductor material were varied and the appropriate materials were designated. Power performance was analyzed in terms of open circuit voltage (OCV), power, and current density production and were used to justify the results of the study. The flow rate of the electrolyte was determined as 150 mL/min in the self-designed configuration. KOH electrolyte of 40 wt% concentration, at a temperature of 55 to 65 ℃, and with a flow velocity of 0.12 m/s was considered to be beneficial for the ZAFCs operated in this study. Nickel mesh with a surface area of 400 cm2 was chosen as anode current collector and copper plate was considered as cathode conductor material in the fuel cells designed and operated in this study. The power production of this study was better compared to some previously published works. Thus, effective enhancement and upgrading process of the ZAFCs will definitely provide great opportunities for their applications in the future.

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Section: Concentration Of Electrolyte 176mentioning

confidence: 99%

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

et al. 2019

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“…Such approaches are not very popular, obviously, due to their complexity, relatively low information provided, and limited area of application. Interestingly, the mathematical models of the second type dealing with the processes occurring within MFC have been widely used earlier [32], and are actively applied in recent works [33]. The mathematical models of MFC include blocks describing growth of microorganism population, reaction kinetics in the system, transport of the components of MFC processes, and power generation.…”

Section: Introductionmentioning

confidence: 99%

Glucose-Oxygen Biofuel Cell with Biotic and Abiotic Catalysts: Experimental Research and Mathematical Modeling

et al. 2020

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The demand for alternative sources of clean, sustainable, and renewable energy has been a focus of research around the world for the past few decades. Microbial/enzymatic biofuel cells are one of the popular technologies for generating electricity from organic substrates. Currently, one of the promising fuel options is based on glucose due to its multiple advantages: high energy intensity, environmental friendliness, low cost, etc. The effectiveness of biofuel cells is largely determined by the activity of biocatalytic systems applied to accelerate electrode reactions. For this work with aerobic granular sludge as a basis, a nitrogen-fixing community of microorganisms has been selected. The microorganisms were immobilized on a carbon material (graphite foam, carbon nanotubes). The bioanode was developed from a selected biological material. A membraneless biofuel cell glucose/oxygen, with abiotic metal catalysts and biocatalysts based on a microorganism community and enzymes, has been developed. Using methods of laboratory electrochemical studies and mathematical modeling, the physicochemical phenomena and processes occurring in the cell has been studied. The mathematical model includes equations for the kinetics of electrochemical reactions and the growth of microbiological population, the material balance of the components, and charge balance. The results of calculations of the distribution of component concentrations over the thickness of the active layer and over time are presented. The data obtained from the model calculations correspond to the experimental ones. Optimization for fuel concentration has been carried out.

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“…Both strongly affect bacterial metabolism and electron transfer (Cournet et al., 2010), but the latter has not been studied in detail for bacteria at high temperatures and low pH conditions. Elucidation of the mechanisms involved in EET has been the subject of widespread attention, as it is essential in the understanding of natural processes such as biogeochemical cycling as well as in the development and optimization of many applications, ranging from biofuel production to bioelectrochemical systems (Chen et al., 2012, Collier and Mrksich, 2006, Lan et al., 2018, Marsili et al., 2008, Nielsen et al., 2010, Pfeffer et al., 2012, Wang et al., 2018, Wu et al., 2018). Hence, it is imperative to understand how microorganisms manage to retain electron transfer capabilities between intracellular and extracellular environments under extreme conditions.…”

Section: Introductionmentioning

confidence: 99%

Electron Communication of Bacillus subtilis in Harsh Environments

et al. 2019

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SummaryElucidating the effect of harsh environments on the activities of microorganisms is important in revealing how microbes withstand unfavorable conditions or evolve mechanisms to counteract those effects, many of which involve electron transfer phenomena. Here we show that the non-acidophilic and non-thermophilic Bacillus subtilis is able to maintain activity after being subjected to extreme temperatures (100°C for up to 8 h) and acidic environments (pH = 1.50 for over 2 years). In the process, our results suggest that B. subtilis utilizes an extracellular electron transfer as an electron communication pathway between B. subtilis and the environment that involves the cofactor nicotinamide adenine dinucleotide as an essential participant to maintain viability. Elucidation of the capability of the non-acidophilic and non-thermophilic strain to maintain viability under these extreme conditions could aid in understanding the cell responses to different environments from the perspective of energy conservation pathways.

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Constructed mathematical model for nanowire electron transfer in microbial fuel cells

Cited by 18 publications

References 23 publications

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

Glucose-Oxygen Biofuel Cell with Biotic and Abiotic Catalysts: Experimental Research and Mathematical Modeling

Electron Communication of Bacillus subtilis in Harsh Environments

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