Low-Temperature Catalytic Clearing of Gases of Thermal Power Station from Harmful Impurity in the Presence of the Cobalt Complexes Fixed on a Polymeric Matrix

Abstract:

The results of optimization of catalysts for gases clearing from sulfur dioxide using processes of oxidation are presented in this work. The researches carried out with the help of modern methods: kinetic, IR-, UV-spectrophotometric, viscometry, LG-chromatography, redox-potentiometric. It is shown, that developed complexes of transitive metals immobilized on a polymeric matrix are highly effective and stable catalysts for the sulphur dioxide oxidation processes. By the example of cobalt compounds the reactions kinetic investigated in details, the kinetic equation is received, allowing to optimize process of gases clearing from sulfur dioxide, kinetic and thermodynamic parameters of process are calculated.

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 1586-1592
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.1586
• Online since: September 2013
• Authors: V.S. Yemelyanova, T. V. Shakieva, Zh.K. Kairbekov, E. M. Shakiev, B. B. Baizhomartov
• Keywords: Clearing, Cobalt, Gases, Katalysys, Matrix, Nitrogen Oxides, Polymer, Sulfur Dioxide

References

[1] At t=0°Ck=l/mol·s In the studied interval of character of kinetic dependences does not change, curves pass through a maximum. The quantity of absorbed O2 practically does not depend on initial concentration of Co(II) in system and correspondsto the stoichiometry of reaction (2). 2SO2 + O2® 2H2SO4 (2) Fig. 2.Thesodium sulphiteoxidation at the presence of cobalt complexes immobilized on humate Т=333К, = 1 atm.,= 2,0×10-3mol/l, = 2,0×10-2mol/l, СHA = 1,0×10-3mol/l b: cj: 1; 2-; 3 - Thedependence of oxygen absorption rateWmax on initial concentration of Na2SO3 in the solution is described by the equation:

[3] whereb1 and b2–equilibrium constants of the systems:

[7] Conclusion In summary, with the help of viscosimetry, potentiometric researches, analysis of diagrams of a condition of intermediate complexes, their electronic spectra, quantum-chemical calculations it was able to optimisecomposition of the catalyst which has been tested in flowing conditions on pilot vortical installation with productivity 2 m3/houron the modelling gases containing SO2,NO,and also has passed tests at theCHPP-2 of Almaty in the process of smoke gases clearing fromsulphurcompounds on installation with productivity 180m3/hour. It was able to lower content of SO2by 90-92%, NOx – by 80-83 %, CO – by 80-82 % and to leadeffluent gases to the sanitary norms. In the conditions of interphase catalysis in the solution tributylphosphate-water in the presence of cobalt complexes fixed on humic acid catalyst possessing high activity and high stability allowing to oxidise 1×105mol of the SO2 on mol of the catalyst without activity lossis developed. The technology of reaction product– sulfuric acid separation in the process of gases clearing from SO2 is developed.