Technical Paper
Catalytic Reduction of S I Engine Emissions using Cu-ION Exchange ZSM-5
2001-01-10
2001-26-0013
The growing pollution from automobiles and increasing awareness of harmful effects of the air due to pollution has resulted in more stringent emission control norms. Consequently earlier techniques of emission control such as combustion modification, water injection and exhaust gas recirculation have to be supplemented by advance exhaust gas after treatment to meet stringent regulations. The most efficient exhaust gas after treatment system envisages the use of a Catalytic Converter for oxidizing the Carbon monoxide (CO), and un-brunt Hydrocarbon(UBHC) to Carbon-dioxide (CO2) and water, and reducing the oxides of Nitrogen (NOx). The exhaust gas is made to pass through a catalytic bed which catalyses the conversion reactions for the different exhaust gas components. Three way catalysts (TWC) are, extensively used for simultaneous control of the three principal automotive pollutants, namely, carbon monoxide (CO), Hydrocarbon (HC) and Oxides of Nitrogen (NOx).