Dissertation > Excellent graduate degree dissertation topics show

Research on Denitrification Performance of Titanium-Based SCR Catalysts

Author: HuJianFei
Tutor: SongKai
School: Taiyuan University of Technology
Course: Thermal Power Engineering
Keywords: SCR catalyst Denitrification performance Experimental study Poisoning Dynamics
CLC: X701.2
Type: Master's thesis
Year: 2011
Downloads: 298
Quote: 1
Read: Download Dissertation

Abstract


Nitrogen oxides is recognized worldwide as one of the atmospheric pollutants, NH3 reductant selective catalytic reduction flue gas denitrification technology (SCR) is the most effective technology governance flue gas NOx pollution. In order to study and explore the SCR efficient catalyst, titanium-based catalyst preparation and its active component changes, changes in process parameters, such as reaction of NO removal performance of a theoretical and experimental study. Prepared by impregnation and the different proportions of V2O5/TiO2 V2O5-WO3/TiO2, CeO2/TiO2 Mixed Oxides, CeO2-MnO2/TiO2 CeO2/TiO2-ZrO2 catalyst samples. By testing the activity of each catalyst, the catalytically active component and auxiliaries content of the impact of change on the catalyst activity. The result found that: a content of 1% and 1.2% V2O5 V2O5/TiO2 (mass ratio) catalyst, and 1.2% V2O5-10% of WO3/TiO2 (mass ratio) of the catalyst is a vanadium-based catalyst obtained from the experiment with optimum activity group assignment ratio . Cerium-titanium catalyst, when the the CeO2 loading amount exceeds 10%, the reaction temperature is 250-450 ° C, airspeed value of 30000h-1, CeO2/TiO2-ZrO2 catalyst denitration efficiency stable at 94.55% -99.64%. S02 catalyst activity. SO2 on denitrification in the V2O5/TiO2 catalyst CeO2/TiO2-ZrO2 catalyst activity have a certain impact, but has little effect on the ability to resist SO2 poisoning. V2O5/TiO2 catalyst additives of WO3 catalyst to improve the anti-sulfur performance, the denitration efficient than V2O5/TiO2 catalyst. The presence of SO2 and water vapor in the flue gas, to some extent, affected the ability V2O5/TiO2 the catalyst and CeO2/TiO2-ZrO2 catalyst removal of NO, with the rise of reaction temperature on the catalytic denitration performance gradually decreases . High-temperature phase, the presence of steam, there conducive to CeO2/TiO2-ZrO2 catalyst resistance to SO2 poisoning. The V2O5/TiO2 catalyst activity of potassium compounds. The experimental results show that: the potassium compound V2O5/TiO2 catalyst is toxic, the denitration rate is drastically decreased with the increase in the amount of potassium load. When the catalyst add WO3, the NO removal rate increased catalyst denitration effectively improve performance. This shows that, WO3 has some anti-potassium poisoning performance. Reaction temperature, space velocity value, O2 concentration, ammonia than the initial NO concentration V2O5-WO3/TiO2 Ce02/TiO2-ZrO2 catalyst activity, decreasing airspeed value, ammonia than O2 concentration of NO and the increase of the initial concentration, the denitration rate showed an increasing trend. V2O5-WO3/TiO2 catalyst kinetic analysis. Eliminate external diffusion the impact and NH3/NO molar ratio greater than 1, the calculated Catalytic Reduction of NO and NO response V2O5-WO3/TiO2 catalyst series 1.0493, O2 reaction order for 1.1366 obtained reaction rate V2O5-WO3/TiO2 catalyst macrokinetics equation.

Related Dissertations

  1. Study on Characteristics of Contiuous Fiber-Reinforced Metal Matrix Composites under Hypervelocity Projectile Impact,TB332
  2. Modeling Analysis and Slip Estimation for Lunar Rovers,TP242
  3. Reaserch on Dynamics for Fast Walking of Biped Robot,TP242.6
  4. Analysis and Control of 6-DOF Electrical Driven Parallel Manipulator,TP242.2
  5. Studies on Chitosan and Its Derivatives Adsorption for Paralytic Shellfish Poisoning in Ostrea Rivularis Could,TS254.4
  6. The Drying of Tilapia Fillet Using Supercritical Carbon Dioxide,TS254.4
  7. Influence of Nanostructure on Hydrophobic Properties at TiO2 Surface Studied by Molecular Dynamics Simulation,O614.411
  8. Hydrophilic structure of different types of surface -modified polyurethane material and coagulation 12 factor nine peptide fragments,and fibrinogen P1 fragment of computer simulation of the interaction,O631.3
  9. The Dynamic Performance Analysis of Oil Pumping Center and Structural Optimization of Improvement,TE933.1
  10. The Establishment of Chemical Toxicological Database for Wool Industry,TS131
  11. Influence of Nitrate Concentrations on the Production of N2, N2O, NO, and CO2 by Soil Cores During Anaerobic Incubation,X131.3
  12. Environmental Lead Exposure Among Preschool Children in Hefei, China: Blood Lead Level and Risk Factors,R179
  13. Research on Key Technology of Recycling Horizontal Subsea Pipe Conector,TE973
  14. Study on Combustible Gas Leakageage and Diffusion by CFD Simulation,X937
  15. Water in oil emulsion of water hit the harmonic the demulsification dynamics analysis and its mechanism,X703
  16. Experimental Study of GUI QIN MISTURE on Adriamycin-induced Nephropathy in Rats,R285.5
  17. A Preliminary Studyabout the Changes of Opioid Receptors after Acute Carbon Monoxide Poisoning,R595.1
  18. Traumatic Brain Injury Patients with White Blood Cells in Peripheral Blood CD34~+ Cells and Content Changes,R651.1
  19. Alpine Meadow nitrogen mineralization and microbial Mechanism,S812
  20. Gas and coal dust explosion characteristics of coexistence and Communication Research,TD712
  21. Internal power dynamics of district offices,D630

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Exhaust gas processing and utilization > Smoke and dust
© 2012 www.DissertationTopic.Net  Mobile