Dissertation > Excellent graduate degree dissertation topics show

Study on Catalytic Wet Oxidation of Refinery Spent Caustic Wastewater

Author: WuAiMing
Tutor: DaiYouZhi
School: Xiangtan University
Course: Environmental Engineering
Keywords: Refinery spent caustic wastewater Catalytic Wet Air Oxidation Catalyst Autoclave
CLC: X742
Type: Master's thesis
Year: 2007
Downloads: 287
Quote: 3
Read: Download Dissertation

Abstract


Refining caustic sludge generated in the petroleum refining industry, oil alkaline washing waste lye, a large number of toxic organic compounds containing phenols and organic sulfides, biodegradable, conventional treatment effect is not ideal, causing serious pollution to the environment. This paper to solve the technical problems of Changling Branch of China Petroleum \u0026 Chemical Corporation refinery spent caustic wastewater treatment, wet air oxidation, and its enhanced treatment process research, focusing on catalytic wet oxidation processing refinery spent caustic wastewater catalyst preparation performance of spent caustic wastewater treatment research, and Mn-based catalyst for catalytic wet air oxidation of spent caustic wastewater Preliminary reaction mechanism. Wet oxidation of refinery spent caustic wastewater showed: partial pressure of oxygen and the treatment effect was positively correlated with the COD removal efficiency of 71.43% when the oxygen partial pressure of 2.0MPa theoretical oxygen demand of 1.18 times, and when the amount of oxygen not less than 0.59 times the theoretical oxygen demand, a fundamental solution to the problem of coking; Acidification Recycling - combination of wet oxidation process, the COD removal after acidification 71.9% [0] subsequent wet oxidation COD removal of 40.7%, with a total Developed for spent caustic wastewater wet oxidation catalyst MnO x / γ-Al 2 the O 3 and MnOx-CeO x / γ-Al 2 O 3 , MnO x / γ-Al 2 O 3 caustic sludge wastewater treatment showed high activity and stability, the element Ce added to further improve its performance. Catalyst characterization results: the presence of a catalyst surface after processing spent caustic wastewater more organic functional groups present in the structure the of MnCO3 and a Al 45 O 45 (OH) 45 Cl. Mn based catalysts for catalytic wet air oxidation of refinery spent caustic wastewater, when the partial pressure of oxygen 2MPa, reaction temperature of 220 ° C, amount of catalyst 2g / L, the COD removal rate of 91.33%; catalyst can be reused three times, COD removal remains In more than 85%, the catalyst activity after regeneration enhance 1.83%, the catalyst has good stability. Catalytic wet oxidation reaction mechanism are discussed theoretically come to the high oxygen partial pressure help to improve the reaction rate; manganese load is too high or catalyst dosage overdose inhibit the oxidation reaction, resulting in a negative catalysis ; the doped CeO 2 can improve the MnO x / γ-Al 2 O 3 catalyst activity and stability .

Related Dissertations

  1. Study on the Procees for the Preparation of Prohexadione and Its Analogs,TQ452
  2. Study on Using Sepiolite As Supported Catalysts in Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol,O643.32
  3. The Preparation of Polyaniline-Metal Complex and the Study on Its Catalytical Property,O634
  4. Synthesis and Characterization of Monovalent, Divalent Imidazolium Ionic Liquids Containing Hydrocarbons,O621.3
  5. Pt -based catalysts of direct methanol fuel cells,TM911.4
  6. The Study of Anode Catalyst Pd/C for Direct Formic Acid Fuel Cell,O643.36
  7. Study on the Synthesis of the Polypyrrole-Cobalt Oxides and Their Catalytic Behavior for the Electroreduction of H2O2,O643.32
  8. The Basicity of MO/ZrO2 Catalyst and Their Use in the Synthesis of 2-Ethyl-Hexyl Carbonate,O623.662
  9. Application of Charcoal Loaded Catalyst for Treatment of Organic Pollutants,X703
  10. Controllable Synthesis of Carbon Nanotubes Supported Metall Nanocatalysts and the Study on Their Electrocatalysis,O643.36
  11. Synthesis of 1,4-Butynediol from HCHO and C2H2 Over CuO-Bi2O3/MgO-SiO2,TQ223.162
  12. Research on Fuel Gas Production from Catalytic Gasification of Municipal Solid Wastes,X799.3
  13. PtRh / Pt 5 / C Catalyst Preparation, Characterization and Electrocatalytic Oxidation of Ethanol,TM911.4
  14. Epoxidation of olefins with high activity cobalt zeolite catalysts,O643.32
  15. MCM-41 as aryl oxime palladium catalyst and catalytic Suzuki coupling reaction of aryl,O643.36
  16. Nano Pt / SiC Preparation, Characterization and Electrochemical Catalytic Performance,TM911.4
  17. Synthesis of t- butyl alcohol using tert-butylbenzene, the catalyst selection and research,TQ241.1
  18. Synthesis and Responsive Behavior of Amphiphilic Azobenzene Functionalized Block Copolymers,O631.3
  19. Study on Potassium Catalyst Recovery of Coal-Steam Catalytic Gasification,TQ546
  20. Research of Ni-Based Catalysts for Hydrogen Generation from NaBH4 Hydrolysis,O643.36
  21. Catalytic Study of Hydrogen Peroxide Synthesis Directly from H2 and O2,TQ123.6

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > Oil, gas, industrial waste treatment and comprehensive utilization > Petroleum refining
© 2012 www.DissertationTopic.Net  Mobile