Research Of The Carbon Fibre Felt Catalyst Of Flue Gas Desulfurization

Activated carbon fiber (ACF), as a new type of high performance adsorbents, is widely used for environmental technologies, especially in flue gas clear up. The influence factors of ACF for SO₂ removal (for example, precursor, preparation condition and surface physical and chemical properties of ACF) were reviewed, and the mechanism of SO₂ removal by ACF was discussed. V₂O₅-ACF was studied stressly. Based on the analysis of the preliminary conclusion, we ensured that the appropriate solution was mixed solution of 1.97%NH₄VO₃ and 0.68%CsVO₃ and 6 hours each time (for 3 times) .Moreover, the best roasted condition was the temperature of 250℃for 50 minuters. Regarding simulation flue gas in the laboratory as the research object, the disquisition had examined the relationship between desulfurization and time, response temperature, and density of charge-in of SO₂. The experimental results showed: â‘ At the initial stage of recation in desulphurization (t≤50min), the removal rate of SO₂ was obviously reduced with reaction time; 50 minutes later, the reaction reached a balance state and the temperature had nothing to do with the rate of removal of SO₂. â‘¡Reaction temperature have a great influence on desulphurization rate. The best desulphurization temperature is 376K. â‘¢T he desulphurization rate had the index relation with the density of charge-in of the sulfur dioxide. During the experiment, we also compared the treatment of flue gase by V₂O₅-Cs₂O-ACF with KI-ACF and blank-ACF. We designed the basic oprating conditions of the desulphurization in the single factor experiments: C_SO2in= 0.225mol/m³,empty speed = 24000Nm³/ (t_ACF·h ), T= 348K. The results indicated : KI -ACF > V₂O₅ -Cs₂O -ACF > 空白-ACF Through the alteration of the concentration of SO₂ and O₂, the dynamics were studied. The correlativity of the reactiom time and the removal rate of SO2 was analyzed and a simplified mechanistic model for the desulphurization was derived. The kinetic reaction equation of V2O5-Cs2O-ACF desulphurization was fitted as follows: 22 23dCd StO = 0.072exp( ? 7.84R3T ×10)C S1O.0 25 CO0.5793 The kinetic reaction of blank-ACF desulphurization reflects was fitted as follows: 22 23dCd StO = 0.06481exp( ? 14.66R3T ×10)C S1O.3 449 CO0.6873...