Dissertation > Excellent graduate degree dissertation topics show

The Research on Photodecomposition Rules of Chlorine Dioxide Gas

Author: ZhangXiaoYu
Tutor: JinRiYa
School: University of North
Course: Environmental Engineering
Keywords: chlorine dioxide gas photodecomposition influencing factors structure mechanism
CLC: O613.42
Type: Master's thesis
Year: 2011
Downloads: 30
Quote: 1
Read: Download Dissertation

Abstract


In recent years, the chlorine dioxide gas has attracted more and more attention because of its safety, broad spectrum, and easy to spread in sterilization, disinfection and food preservation. However, the characteristic of easy to decomposition in light, bring a barrier for its application and promotion. For the above reasons, the study on decomposition rules, influence factors, the structure of chlorine oxide and decomposition mechanism of chlorine dioxide gas was carried out. As follows:（1） The study on the decomposition rate of chlorine dioxide gas and its influence factorsChlorine dioxide gas collection and photodecomposition experiment device is self-designed.the study on the decomposition rate of chlorine dioxide gas in different light sources, different temperatures and different initial concentrations, has been done. The degradation rate of Chlorine dioxide gas from fast to slow is the 354nm UV light, natural light, 257nm UV, fluorescence, and the dark room, indicating that the light making a key role on the photodecomposition rate of gradation of Chlorine dioxide gas is the wavelength of UV near the visible and the shorter wavelength of visible light; the concentration of Chlorine dioxide gas was not changed in darkness. In the range of 15 25℃, the temperature had no effect on the degradation rate of the Chlorine dioxide gas.Chlorine dioxide gas in the high concentration （100 200mg / L）, the time that the concentration of chlorine dioxide gas is half of the initial concentration is between the 50 60min; when the concentration was low （≤20mg / L）, only 10 20min is used to completely decomposition totally.（2） The study on the structure and bonds of chlorine oxideBased on B3LYP/6-311 + G （3df） basis set, the structure, bond, angels, energy and vibration frequency was calculated. The results show that: the chemical bond which links the two momo-chlorine fragments of a di-chlorine oxide or peroxide is formed between their reactive centers and determines the structure; the formation of Cl-Cl bond is not favored.（3） The decomposition products and decomposition mechanism of Chlorine dioxide gasDepend on the experimental analysis and theoretical calculations, found gas in the process of ClO2 photodecomposition products of Chlorine dioxide, Cl2 ,Cl2O4 and Cl2O6, was found, the middle product is Cl2O5, and proposed a possible reaction mechanism.

Related Dissertations

  1. Study on Hermetic EDGE Sealing of Anodic Bonding for Vacuum Glazing,TQ171.1
  2. Synthesis, Structure and Properties of PBO/SWNT Composite Fibres,TQ340.64
  3. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,TB332
  4. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  5. Research on Mechanism Analysis and Modeling Simulation of Horizontal Well Tractor,P631.83
  6. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  7. Investigations of Structure and Glass Forming Abilty of Amorphous Alloys,TG139.8
  8. Technology of Filling Clearance and Optimizing the Bonds during Ultrasonic Brazing,TG454
  9. The Effect of Composite Additive on the SNCR,X701
  10. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  11. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  12. The Study on Structural Calculation and Analysis Method of Lattice-type Crane with Variable Cross-section Boom,TH21
  13. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  14. Influence of over Fired Air on Gas-Solid Flows in a W-Shaped Flame Boiler,TK229
  15. Simulation Research on Compound-Structure Permanent-Magnet Synchronous Machine System Used in Hybrid Electric Vehicles,TM341
  16. Research on an Axial/Radial-Axial Flux Compound-Structure Permanent-Magnet Synchronous Machine Used for Hybrid Electric Vehicle,TM341
  17. Hong'an dialect syntax research,H146
  18. Kunming Transient Population Community Present Situation, Question and Countermeasure Preliminary Study,C924.25
  19. Adjust the structure of higher education in Yunnan Strategy Study,G649.2
  20. Research on Stability of Hierarchical Sattellite Network,TN927.23
  21. Research on Autamatic Music Structrue Analysis,TN912.3

CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Non-metallic elements and their compounds > The Ⅶ family of non-metallic elements ( halogens) and its compounds > Chlorine Cl
© 2012 www.DissertationTopic.Net  Mobile