Dissertation > Excellent graduate degree dissertation topics show

Modification of Coarse α-Al2O3 Microfiltration Membranes for Separation of Oil/Water System

Author: ZuoMingYue
Tutor: YangJianHua
School: Dalian University of Technology
Course: Chemical Engineering and Technology
Keywords: Microfiltration Oil Wastewater Hydrophilic Performance NaA zeolite SiO2
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 35
Quote: 0
Read: Download Dissertation

Abstract


Membrane technology has many advantages, such as convenient operation, low-energy requirements, no phase transformation, simple to device the scale, however, for microfiltration and ultrafiltration membranes in dealing oil wastewater there still are still many problems, such as membrane pollution and strong polarization which may cause separation performance degradation, limiting the inorganic membrane intensive industrial applications. Therefore, in order to overcome the above problems, the research of high water hydrophilic inorganic membrane materials has a very important theoretical and practical significance.In this article using silicon sol and dip-coating technique SiO2 modified microfiltration membranes were also prepared on the above supports;α-Al2O3 membrane was also modified by deposition of NaA zeolite under flowing synthesis condition and the NaA modified microfiltration membranes with different pore diameter were prepared; the as-prepared ultrafiltration membranes were applied to the treatment of wastewater with oil, respectively. Moreover, morphology and structure of these membranes were characterized by SEM, N2 permeation test, water flux and pore size distribution analysis. And some novel findings in this work are as follows:(1) By the orthogonal design method, some parameters such as the concentration of silicon sol and, dip-coating time and impregnation times for the preparation of SiO2 modified microfiltration membrane were investigated. It’s found that the as-prepared membrane has well morphology and structure at the concentration of silicon sol of 5% and dip-coating time of 30 s.(2) The SiO2 modified microfiltration membrane shows favorable hydrophilic performance compared with the original support. In the treatment of oil wastewater, the interception rates for SiO2 modified microfiltration membranes with pore diameters of 1.65μm,0.74μm and 0.48μm were 95% ,>99% and>99%. And the corresponding fluxes were up to 110 L/m-2h,47 L/m-2h and 32 L/m-2h.(3) The effects of operation conditions in the flow system on the membrane performance were investigated. For the synthesis solution of 56Na2O:1Al2O3:5SiO2:XH2O, when the was 500, the flow velocity was 1mm/s, the as-prepared membrane has good performance. By adjusting the synthesis time membranes with different pore diameters can be prepared.(4) The hydrophilic performance of zeolite modified Al2O3 support was enhanced significantly. With the extension of synthesis time, the coverage of NaA zeolite on the Al2O3 support was increased. In the treatment of oil wastewater the NaA modified support exhibited high performance, such as interception rates for membranes with 0.96 and 0.23μm were up to 98.6% and 99.1%, and the fluxes were up to 84L/m-2h and 47L/m-2h.

Related Dissertations

  1. Study on Properties of Ce、Co、Ni/V-W/TiO2 Modified by Composite Sol for Selective Catalytic Reduction,X701
  2. Preparation and Characterization of Polymer Micro/Nano Fibers by Laser Melt Electrospinning,TQ340.64
  3. Modification for PVA-Based Composite Packaging Material with Nano-SiO2 and Its Influence on Fresh Preservation Effect of Salted Duck Eggs,TS253.46
  4. Synthesis of 1,4-Butynediol from HCHO and C2H2 Over CuO-Bi2O3/MgO-SiO2,TQ223.162
  5. Lithium anode material calcined alumina crucible Development,TQ174.6
  6. Ni / TiO 2 -SiO 2 Preparation, Characterization and Hydrogenation of Maleic Anhydride,TQ225.2
  7. Preparation and Characterization of Multifunctional Fe3O4/ZnO/SiIO2 Nanocomposites,TB383.1
  8. Catalytic Study of Hydrogen Peroxide Synthesis Directly from H2 and O2,TQ123.6
  9. Study on Catalyst and Process of Catalytic Hydrogenation for Dimethyl Oxalate to Methyl Glycollate,TQ225.24
  10. Research on Novel and Highly Efficient Modified Hybrid CrOx-B/SiO2 Catalyst for Ethylene Polymerization,TQ325.12
  11. Surface Modification of Silica Particals of Different Size and Their Dispersion in Pet,TB383.3
  12. Study on Corrosion Resistance and Condensation Property of Ni-P/Nano SiO2 Composite Coatings,TG174.4
  13. The Monomer Compoment and Fillers Microstructure Effect on the Properties of Dental Resin Composites,R783.1
  14. SiO 2 microspheres as the precursor of the white LED phosphor synthesis and properties of,TN104.3
  15. Blue phosphor for PDP SrMgAl 10 O 17 : Eu 2 of combustion synthesis , surface modification and luminescence properties of,TN104.3
  16. Nano-crystalline TiO 2 Fiber 's Preparation of and Its Photocatalytic water purification research,O643.32
  17. Silica / poly (vinylidene fluoride) Hydrophobic Coating and drag reduction performance,TB383.1
  18. Multi- stage membrane process in Printing and Dyeing Wastewater Treatment Research,X791
  19. The Amino-Modification on the Surface of Magnetic Fe2O4/SiO2 Support and the Immobilization of Laccase on IT,Q814
  20. Investigation of Membrane Fouling and Its Affecting Parameters in Membrane Bioreactor (MBR),X703
  21. Treatment of Wastewater Containing Strontium and Cesium by Combined Microfiltration Process and Pelleting Process,X703

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