Application of Gamma Alumina (γ-Al2O3) as Washcoat for Non-Noble Metal based Catalytic Converter and its Performance Evaluation

Abstract

Due to excellent economy and durability, gasoline engines have been used widely in automobiles and other energy production machinery. On the other side, gasoline engines are major contributors towards air pollution. Exhaust from gasoline engines contain carbon monoxide (CO), unburnt hydrocarbons (HCs) and oxides of nitrogen (NOx). More stringent regulations on automobile and other industries have made researchers to develop some technology for reduction of such pollutants from exhaust. In this work three-way catalytic converter is designed to treat the exhaust gases released from engine, for example, Hydrocarbons (HCs), Carbon Monoxide (CO) and Oxide of Nitrogen (NOx). Conventional catalytic converter with precious metal catalyst, Pt/Rd coated on ceramic substrate displays lower efficiency, high generation cost, constrained material supply and not environment friendly. Hence, an attempt to use metal oxide catalyst is researched. Titanium Dioxide (TiO2) with Cobalt Oxide (Co3O4) was picked as the catalyst because of its points of interest in the raw material expense, locally accessible and suitable in manufacturing. The catalysts were coated onto treated wire mesh, SUS-304 where its surface was characterized by using SEM and XRD. Standard procedures were used to measure efficiency of developed catalytic converter. The outcomes revealed some suitability and limitations of the new catalytic converter. In this research work emission pollutants have been decreased such as carbon monoxide was reduced from 2.8 to 0.25 (V/V%) and hydrocarbons from 200ppm to 59ppm.