Catalytic systems on a ceramic fiber carrier with deposited metals in the process of carbon monoxide oxidation

Abstract

This study explores the formation of catalytic systems for the oxidation of carbon monoxide on a ceramic fiber carrier with impregnated ferrite materials, including magnetite, copper ferrite, and chromium ferrite. The oxidation of carbon monoxide was carried out on a flow-type installation with a stationary weight of the catalyst in the temperature range of 50 – 450 °C and an initial concentration of 1 – 2 vol % of carbon monoxide in the gas mixture at the entrance to the reactor. The highest degree of conversion of 98.6% at 450 °C was ensured using chromium ferrite. The composition of the main elements of the surface samples of the ceramic fiber catalyst was confirmed by micro-X-ray spectral analysis of the surface using scanning electron microscopy, which corresponded to the specified Cr6+: Fe2+ =1:15. The results show ceramic fibers modified by ferrites, which do not require significant capital investment, can effectively clean electrode graphitization furnaces and flue gases and neutralize toxic carbon monoxide. We propose a method of fixing the modified fibrous catalyst in a metal frame, which will allow it to be easily placed over the entire surface area of the thermal insulation of the Acheson graphitization furnace to ensure full-scale CO neutralization and subsequently be dismantled after the end of the carbon electrode heat treatment campaign.