Parametric study for N₂O conversion and reduction using cobalt‐oxide‐based catalysts

Abstract

Nitrous oxide is a highly reactive gas with several well-known environmental impacts.Its presence in the atmosphere can decrease the stratospheric ozone levels, cause an increase in the greenhouse gas emissions, and contribute to acid-rain formation.Therefore, in this article, the potential and performance of different types of cobalt oxide (Co 3 O 4 ) catalysts in N 2 O decomposition and conversion was studied. For this, the catalytic activity of these materials was tested in a differential fixed-bed reactor, operated under steady state conditions. The results obtained in this study show reduced CoO achieved 100% N 2 O conversion at 250 C; that CoO has a great performance (>95%) in the absence of oxygen and humidity, regardless of the W/F; even at low space velocities (0.1 g Às /ml) and in the absence of humidity the N 2 O conversion efficiency is still very high (100%); 10%La/CoO has a higher catalytic activity than 10% Ba/CoO, 10% Na/CoO, and 10% W/CoO. The highest catalytic activity (>90%)