Desorption mechanism and kinetics of SO2 loaded activated carbon by microwave irradiation
Abstract：The regeneration of activated carbon after chemically adsorbing SO2 was carried out by using a microwave device. The mechanism and kinetics of the regeneration of SO2 loaded activated carbon were revealed through analysis of the regeneration products. The results show that in the microwave field, there is a rapid increase in temperature of activated carbon and the final temperature is relatively stable. SO2, CO2 and CO are evolved during regeneration, which indicates that there are reactions between H2SO4 and C. The regeneration reactions are carried out before the peak of SO2, and after that a portion of CO2 and CO are owing to the decomposition of oxygen functional groups which is formed on the surface of activated carbon in the process of adsorption of SO2. The order of activated carbon regenera- tion reaction in the main of regeneration reaction is 1.55, which is independent of microwave input power. The reaction rate constant increases with microwave input power increase. According to Arrhenius equation, the apparent activation energy is 46.0 kJ/mol and the pre-exponential factor is 7. 357 s-1.
Keywords：microwave desoptionSO2 loaded activated carbonchemiadsoptionkinetic
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1920-1924 )