Dynamic modeling of a microbial fuel cell considering anodic electron flow and electrical charge storage

Abstract

To describe the anodic electron flow and electric charge storage behavior of an MFC system from an electrical perspective, a dynamic model based on a novel electrical equivalent circuit is developed. Conventional equivalent circuits typically have series impedance to model the system from the standpoint of terminal quantities: output voltage and current. However, the conventional approaches do not properly explain internal anodic electron flow and double-layer charge storage characteristics of MFCs. The proposed model uses an equivalent capacitance in parallel and series resistances to accurately model and characterize the anodic electron flow, electrical charge storage, and the dynamic characteristics of both output voltage and current. Two straightforward test methods are proposed to determine the equivalent circuit parameters. Experimental results showed the validity of proposed MFC model.

Ceramic Microbial Fuel Cells Stack: power generation in standard and supercapacitive mode

“…in 2012 showed that cytochromes were able to store electrons and therefore the capacitive features of the anodes were shown 99 . Several examples related with the anode supercapacitive properties related to the different utilized materials were freshly presented 100 – 102 . In parallel, anode and cathode electrodes of a MFC were lately explored as the negative and positive electrodes of an internal supercapacitor (SC-MFC) 46 , 53 , 96 – 98 .…”

Supercapacitive microbial desalination cells: New class of power generating devices for reduction of salinity content

“…1 a). The same concept was previously exploited to demonstrate a supercapacitive microbial fuel cell [68] , [69] , [70] , [71] , [72] . Here, the concept is applied to a MDC device to improve both power/current generated and desalination efficacy.…”

“…This methodology was previously presented [68] , [69] , [70] , [71] , [72] . In previously reported literature, the supercapacitive properties of the electrodes were tested in MFCs [68] , [69] , [70] , [71] , [72] , whereas in this current work the same features were exploited and utilized in operating MDCs. Here, we demonstrate that these features not only increase the power/current output but also enhance the reduction in salt content.…”

Control and Validation of a Reinforced Power Conversion System for Upcoming Bioelectrochemical Power to Gas Stations

“…parameters in Table 1 are chosen based on the method mentione experimental tests in the nominal state. In a stack with ns series cell parallel branches, the following parameters can be used in the mod The considered model for the EMG-BES cell is shown in Figure 3 [10,28]. The model parameters in Table 1 are chosen based on the method mentioned by [10] and data of experimental tests in the nominal state.…”

“…This represented a milestone for the development of likely processes, producing different added-value chemicals and fuels from CO 2 and renewable energy surplus [17]. The process is performed under mild operational conditions (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) • C and atmospheric pressure) and is driven by electroactive microorganisms, without the need of an expensive catalyst, meaning higher energy efficiency and potentially lower construction and operational costs compared to chemical methanation [18]. Thus, P2G based on EMG-BES represents an innovative and flexible energy storage technology for renewable energy surplus (RES) management.…”