Catalytic Reduction Of CO2 in Gasoline Passenger Car

Abstract

Global warming resulting from the emission of greenhouse gases, especially COR2R, has become a wide spread concern in recent years. We have attempted to reduce carbon dioxide emission from gasoline-operated passenger cars using different catalysts. We have evaluated the absorption efficiencies of activated charcoals prepared from coconut shell as well as wood. The COR2 Rreduction by physical absorption on coconut shell charcoal is approximately 6.8%, whereas the reduction of COR2R on wood charcoal is approximately 9.2%. The physical absorption efficiency is purely a relative amount depending on the nature of the charcoal. In order to differentiate physical absorption and catalytic adsorption, we tried to reduce COR2R on lithium silicatecoated honeycomb. The catalytic activity of lithium silicatecoated honeycomb is approximately 21.4%, which shows relatively higher COR2R reduction performance. The catalyst layer of lithium silicate-coating on honeycomb is chosen in such a way that only chemical bonding and conversion occurs and clathration and absorption cannot take place. Chemical adsorption and catalytic reduction certainly is more efficient than mere physical absorption, as absorption is limited to physical nature of the catalyst. A detailed kinetic study of adsorptionconversion- desorption is required to understand the mechanism