Sustainable removal of N2O by mediated electrocatalytic reduction at ambient temperature electro-scrubbing using electrogenerated Ni(I) electron mediator

Abstract

Highlights  A single step ambient temperature reductive electroscrubbing method was established for N2O removal  Nearly 95% N2O removal efficiency was achieved by electrogenerated Ni(I)  A new valuable product NH3 was achieved in the electroscrubbing process.

Strong Structural Modification of Gd to Co3O4for Catalyzing N2O Decomposition under Simulated Real Tail Gases

“…As a strong greenhouse gas, nitrous oxide (N 2 O) has a larger global warming potential than CO 2 and CH 4 , which is also highly destructive to ozone in the stratosphere. Nowadays, various human activities, including fossil fuel combustion, chemical processes, and vehicle exhaust become the main sources of N 2 O emissions, and the total emission exhibits an upward trend year by year. − Hence, direct catalytic N 2 O decomposition, as an effective way to eliminate N 2 O pollution, attracted more and more attention of global researchers. − Among many N 2 O decomposition catalysts, Co 3 O 4 -based catalysts with a specific spinel structure have been recognized as the most promising catalysts for directly catalyzing N 2 O decomposition because of their satisfactory oxidation reduction property, thermal stability, and low-cost raw materials.…”

Continuous electro-scrubbers for the removal of perchloroethylene: Keys for selection

“…Thus, silver (throughout the Ag(I)/Ag(II) redox mediator pair) has been used for the removal of nitrogen oxides [19] [20], mixtures of NOx and SO2 [21] and odorous substances such as CH3SH and H2S [22]. Nickel has been used as electro-catalyst for the removal of halogenated substances such as C2HCl3 [23], CF4 [24] and CCl4 [25] and for atmospheric pollutants such as NO [26] and N2O [27].…”

Perspective for Emission and Control of Nitrous Gas in Biological Wastewater Treatment

“…Typical GHG includes nitrous gas (N2O), carbon dioxide (CO2), and methane (CH4). Among them, N2O has 300-fold stronger effect than CO2 and 4 ~ 30-fold stronger effect than CH4 (Muthuraman et al, 2019). N2O featured in colorless, nonflammable, sweet-smelling is stable in the atmosphere for prolonged periods (Government of Canada, 2017).…”

“…Being the third most significant anthropogenic greenhouse gas, N2O has been categorized as the greatest contributor to stratospheric ozone depletion (Portmann et al, 2012). The estimated growth of N2O emission is expected up to 14.49 Mt/y by 2020 (Muthuraman et al, 2019).…”