Electro-scrubbing volatile organic carbons in the air stream with a gas diffusion electrode

Storage of energy using a gas-liquid H2/Cl2 fuel cell: A first approach to electrochemically-assisted absorbers

“…In this approach, the gaseous reagents interact directly with the electrodes without the necessity of a liquid electrolyte, because the ionic circuit is closed with the contact of the two electrodes with the solid electrolyte in which ions are transported. The second approach is applied in many other different processes, such as the production of hydrogen peroxide or ozone from the cathodic or anodic reaction of oxygen (Fernando Perez et al, 2019;Perez et al, 2019), respectively, or the electro-scrubbing for the removal of VOCs and other environmental pollutants (Yang et al, 2011;Balaji et al, 2015;Govindan and Moon, 2015). It is more complex, because the electrolyte is the liquid in which the gas is dissolved and the initial stage of dissolution of the gas into the electrolyte is very important in order to achieve high reagent concentrations, which help to avoid mass transport limitations in the electrochemical process.…”

Electro-Absorbers: A Comparison on Their Performance with Jet-Absorbers and Absorption Columns

“…For this reason, other technologies such as scrubbing are gaining relevance, although it is important to take in mind that this absorption process does not attain a complete removal but it only promotes the transference of the gaseous pollutants into a liquid stream that needs for further treatment [11]. In these systems, the mass transfer is a key aspect and efficiency is controlled by residence times and gas-liquid contact surfaces, so that a design with good hydrodynamic behavior is required using high and wide contactors [6,[12][13][14].…”

A review on an electrochemically assisted-scrubbing process for environmental harmful pollutant's destruction

“…Other VOCs, such as methyl parathion, 2-ethoxy ethyl acetate, dichloromethane and trichloromethane, tributyl phosphate, phenyl ethane, acetone and toluene, were degraded using mediators electro-Fenton, Ag(II), Mn(III), CuO, Co(II), etc. [145][146][147][148][149][150][151][152][153]. The intermediate and reaction paths for the oxidation of phenols and chlorinated phenols were identified [154,155] and the method was applied to several hazardous wastes [156].…”