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A Study on the Preparation,Desulfurization and Regeneration of CaO-Fe2O3/γ-Al2O3 Adsorbent for SO2 Removal

Author: WangTao
Tutor: LiangBin
School: Sichuan University
Course: Industrial Catalysis
Keywords: Renewable desulfurizer Supported Calcium oxide Iron oxide
CLC: X701
Type: Master's thesis
Year: 2002
Downloads: 224
Quote: 2
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Abstract


A large number of emissions from coal-fired boilers SO 2 is not only causing serious harm to the environment , or a great waste of sulfur resources annually discharged into the water gas the SO 2 nearly 23.7 million tons . Renewable desulfurization technology is effective control of air pollution, an important means of reasonable recovery of resources . The authors prepared new the compound CaO - Fe 2 < / sub > O 3 / the gamma - Al to 2 < / sub > O 3 < / sub > supported renewable smoke gas desulfurization agent . 600 ° C under simulated flue gas desulfurization of sulfur capacity of 7.7 % ( wt ) , available after desulfurization reaction CH 4 renewable direct recovery of elemental S . The desulfurization agent preferably reproduction performance of the resulting desulfurization , desulfurization recycling by 4 times , the average regeneration rate was 81.3% . Desulfurizer introduced Fe can be changed by the catalytic SO 2 < / sub > oxidation reaction of CaO / gamma - Al the 2 < / sub > O 3 < / sub > desulfurization agent removal of SO < sub> 2 reaction mechanism . There is a certain interaction between Fe and CaO , greatly improving the performance of the the desulfurization agent on the removal of SO 2 . The active substance in the desulfurization agent of calcium oxide and iron oxide in the the SO with the flue gas in the desulfurization process 2 < / sub > and the reaction of oxygen into calcium sulfate and iron sulfate reduction regeneration into the original structure Shiyou calcium oxide and iron oxide, to obtain regenerated. Study on the preparation process of the desulfurization agent , the impregnating solution Ca ( NO 3 < / sub > ) 2 < / sub > of the CaO concentration and the resulting desulfurizing agent loading a linear relationship , in a certain concentration range within the load amount of CaO can estimate to predict the concentration of the impregnating solution . Ca - Fe bicomponent desulfurizer Ca, Fe content in the most suitable ratio of 3:1 . Ca the Fe step-by-step impregnation SO 2 removal , desulfurization rate and desulfurization of sulfur capacity indicators are better than dipping at the same time . The best desulfurization temperature of 600 ° C , after desulfurization desulfurization agent largest S / ( Ca Fe ) atomic ratio of 0.7 .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Exhaust gas processing and utilization
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