V2O5/K2Ti2O5를 이용한 배기가스 내 SO2 제거

Abstract

It is well known that sulfur dioxide(SO2), more than 50% of which arise from combustion of fossil fuels, are source of acid rain and their emission gives a global threat to the atmosphere. In many countries, environmental agencies have regulated emissions of SO2, and the limits are becoming increasingly tight. Until now the primary methods used in industrial field of SO2 disposal are by adsorbing with calcium-based sorbents, which results in another problems of waste slurry or byproducts. As a results, there is a strong tendency to the development and application of processes for reusable sorbent materials.In this work, vanadium oxide loaded potassium titanium oxide was studied as a sorbent for FGD system. Their SO2 removal efficiencies were investigated by conducting TPA and isothermal absorption in a fixed bed reactor system. K2Ti2O5 slows better activities in SO2 removal when metals are loaded on K2Ti2O5. Activity also increased as reaction temperatures goes up, until it reaches limit temperature of K2Ti2O5’s crystal structure collapse. In the condition of 3wt% loading of V2O5 on K2Ti2O5 has better activities compare to the other amount of loading, due to the small BET surface area of K2Ti2O5. After V2O5/K2Ti2O5 react with SO2 species, K2SO4 was formed as product and stored in K2Ti2O5, causing structure change of K2Ti2O5. Further investigation are needed to confirm the reaction mechanism and kinetics in this work.