How Operational Parameters Affect Electromethanogenesis in a Bioelectrochemical Power-to-Gas Prototype

Biochar based cathode enriched with hydroxyapatite and Cu nanoparticles boosting electromethanogenesis

“…Electrodes must give large surfaces to maximize the interaction with microorganisms, minimizing charge transfer resistance and diffusive mass transport [26]. One of the main challenges for increasing the performance of electromethanogenesis, compared to the chemical electrolysis of water, consists of manufacturing electrodes with a geometric surface equal to at least one order of magnitude greater than the volume of the bioreactor (ratio of 10 m 2 m -3 ) [27]. This indication is useful to counterbalance the low current density sustained by microorganisms.…”

Beyond the farm: Making edible protein from CO2 via hybrid bioinorganic electrosynthesis

“…32,34,35 Catholyte alkalization is a common problem in the MESs, and therefore, pH control is usually necessary. 3,35,36 Although the acidic anolyte (pH 1-2) could promote protons to move toward the cathode chamber and thereby balance the cathodic pH, the catholyte pH in Control 1 experiment (no CO 2 supply) kept increasing to 9.85 ± 0.42 at the end of the batch (Figure S1). However, this problem was not serious in the proof-of-concept test.…”

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

“…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.…”

“…In this paper, bioelectrochemical power to gas stations based on an EMG-BES stack is discussed, based on preliminary data collected from a laboratory prototype [21]. The technology has the ability to receive active power and exchange reactive power with the grid (Figure 1).…”