Dissertation > Excellent graduate degree dissertation topics show

(Class ) perovskite -type oxides catalytic elimination of N 2 O

Author: WeiQingBin
Tutor: YuanFuLong；ZhuYuJun
School: Heilongjiang University
Course: Environmental Science
Keywords: perovskite-like oxides N2O catalytic decomposition alkaline earth metal
CLC: X701
Type: Master's thesis
Year: 2011
Downloads: 10
Quote: 0
Read: Download Dissertation

Abstract


Nitrous oxide (N2O) is now recognized as an environmental pollutant. It is not only a substantial contributor to catalytic ozone depletion by being a major source of NOx in the stratosphere, but is also a greenhouse gas. N2O has 310 and 21 times the global warming potential (GWP) of CO2 and CH4, respectively. To control the emission of N2O from chemical processes, the catalysts for N2O decomposition have been widely studied in the last three decades.The Sol-Gel method and citrate combustion method were adopted to synthesize Perovskite or perovskite-like oxides samples in this dissertation, respectively. The structure properties of samples were characterized by XRD, and H2-TPR, O2-TPD were in flavor of understanding the crystal structure, surface characteristics and surface active species. The catalytic activity of several perovskite and perovskite-like catalysts were tested, and the effect of the alkaline earth metal ions、alkaline earth carbonate、alkaline earth oxides doped perovskite-like catalysts for catalytic decomposition of N2O were inspected. It was found that the activity in N2O direct decomposition could be improved by substituting all alkaline-earth metals for La, in which the samples of substituting Ba for La performed best activity. Doping alkaline earth oxides also had a great influence to the catalytic activity of perovskite-like. CaO can promoted the catalytic performance of perovskite-like in N2O direct decomposition. But BaO had serious activity inhibition. La1.6Sro.4Cu04-20%MgO samples showed excellent catalytic activities for the decomposition of N2O, which can convert 100% N2O to N2 at 450 degree centigrade In addition, the paper also researched the catalytic activity of perovskite-like mixed with the alkaline earth carbonate. It was found that the catalytic activity of perovskite-like mixed with 20% BaCO3 may be raised. The mixture of SrCO3 or CaCO3 was not significantly affected on the catalytic activity.

Related Dissertations

  1. Preparation and Photocatalytic Properties of Semiconductor Oxides,O643.36
  2. Efficient Oxidative Degradation of 2,4-dichlorophenol Over Supported CuO-based Catalysts,X703
  3. The Synthesize and Performance Study of Alkaline Earth Metal Vanadates Luminescent Materials R2V2O7 （R=Ca, Sr, Ba）,TB34
  4. Syntheses and Properties Study of Alkaline Earth Metal-organic Frameworks Based on N-containing Carboxylates Ligand,O621.13
  5. Study on Synthetic Method and Reaction Mechanism of Nano Perovskite Non-oxides,TB383.1
  6. Alkaline Earth Metal Modified SAPO-34 Used for Methanol Conversion to Light Olefins,TQ221
  7. Study on Structure and Magnetoresistance Effect of Mn-site Doping of La-Sr-Mn-O and La-Sr-Mn-O/Mn-Zn Ferrites Composites,O482.5
  8. Corrosion Inhibition and Electrochemical Behaviors of Aluminum in Alkaline Solutions,TG174
  9. Perovskite ruthenium oxide Sr_ ( 1 - x ) Ca_xRuO_3 ( 0 ≤ x ≤ 1 ) series magnetic and transport properties of the sample,O482.5
  10. The La-Ba-Co based perovskite-type composite oxide catalytic decomposition of nitrogen oxides,O643.32
  11. Experimental Study on Synthesis of Perovskite-type Oxides La1-xSrxFe1-yCoyO3 by Sol-gel Method,TB39
  12. Syntheses, Crystal Structure and Properties of Polyoxometalate Clusters with Dawson and Anderson Structures as Building Blocks,O631.3
  13. Study on Preparation and Properities of Nano-TiO2 Photo-catalyst Coated on Magnetic Particles,O643.36
  14. Preparation of the One-dimensional Perovskite Oxides Materials and Their Physical Properties,TB383.1
  15. Syntheses, Structures and Properties of Rare Earth and Alkaline Earth Complexes Based on Multipodal Carboxylate Ligands,O621.13
  16. Hydrothermal Synthesis and Properties of the Perovskite-type Manganites and Ferrites,O611.3
  17. Investigation on Desalination and Incineration in Fluidized Bed for Organic Salty Liquid Wastes,X703
  18. Synthesis and Structure of Alkaline-earth Complexes Based on Aromatic Carboxylate Ligands: From Monometal to Heterometal,O641.4
  19. Study of Simultaneous Desulfurization and Denitrification with Calcic-Based Absorbent in a Fixed Bed,X701.3
  20. Numerical Simulation of Atomization and Evaporation Processes in Multi-Spouted FGD Reactor,X701.3
  21. Experimental Research on Influence of Coal Reburning Reaction Conditions on NO_x Reduction by Non-Catalytic Reduction of Ammonia,X701

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