Dissertation > Excellent graduate degree dissertation topics show

Preparation and Gas Separation of Siiicatite-1Membranes

Author: ZhangCong
Tutor: ZuoWenFu
School: Jilin University
Course: Inorganic Chemistry
Keywords: Silicalite-1 Membrane Zeolite Gas separation Secondary growth Mesoporoussilica
CLC: TQ424.25
Type: Master's thesis
Year: 2012
Downloads: 141
Quote: 0
Read: Download Dissertation

Abstract


Zeolites are crystalline structures that have uniform, molecular-sized pores.These inorganic structures have been used extensively as catalysts and adsorbents.More recently, continuous polycrystalline zeolite layers have been deposited onporous supports and used as zeolite membranes. Suzuki reported the first zeolitemembranes in1987. Since then, significant progress has been made to improve thequality of zeolite membranes and widen their range of applications. Today, more than14zeolite structures, including MFI, LTA, MOR, FAU, CHA, MEL, AFI, FER, BEA,GIS, ANA, DON, OFF, and ATN have been prepared as membranes. With growingconsumption of fossil fuels, gigatons of carbon dioxide are emitted into theatmosphere every year. Carbon dioxide is the main component of greenhouse gases,and would trigger severe global climate change if it accumulated to a high level in thelong run. To alleviate CO2accumulation it is important to separate and recycle carbondioxide before it is released in to air. Currently, several types of zeolite membranesare used for the separation of CO2from other gases, such as MFI, LTA, FAU, DDR.The MFI structure is most commonly used in zeolite membranes because of its poresize and ease of preparation, and this structure includes silicalite-1and ZSM-5.Silicalite-1is made up of pure silica, and ZSM-5has Al substituted for some of the Siatoms.Zeolite membranes can be synthesized on a variety of supports. The supports canbe made of any of the available materials such as amorphous silica, silicon wafers,glass, stainless-steel-net, porous ceramics, porous α-Al2O3, γ-Al2O3. In order to obtain a better separation performance, zeolite membrane should be preferably made of purezeolite crystals with uniform and small particle size. Several preparation methods arereported for the synthesis of zeolite membranes, In-situ hydrothermal synthesismethod, Secondary growth method, Microwave synthesis, Continuous flow synthesismethod, pulsed laser ablation method and so on.A new method for quick fabrication of continuous and compact silicalite-1(Si-MFI)membrane on stainless steel net was developed. The method consists of pre-treatmentof substrate of stainless steel net with silica solution containing polyethylene oxide(PEO) polymer and a secondary growth process. The continuous and compact Si-MFImembranes were obtained within12h under hydrothermal conditions. The membranewas further characterized by scanning electron microscopy (SEM) and X-raydiffraction (XRD) analyses. SEM analyses showed that the membrane was continuousand highly compact. XRD analyses suggested that the micro-crystals embedded in themembrane were well crystallized. The permeance and separation performance of theSi-MFI membrane were examined with a gas-separation setup combining a gaschromatography. The results showed that the Si-MFI membrane had an excellentpermeance and separation performance for CO2and N2.The influence of the synthesis parameters, such as the molecular weight of PEO,the type of template, and the modification or not of the substrate, on the quality of theSi-MFI membrane supported by stainless-steel-net was also investigated.

Related Dissertations

  1. Recovery Whey Soy Protein by Microfiltration and Development of Whey Powder,TQ936.2
  2. Powered Activited Carbon-UF for Treating Micro-polluted Surface Water,X703
  3. Fabrication of Membrane Electrode Assembly for PEMFC,TM911.4
  4. The Study on Cryopreservation and Mechanism of Freezing Injury on the Spermatozoa of Coelomactra Antiquate,S968.3
  5. The Research about the Processing and Performance of Waterproof Breathable Laminated Fabrics,TS195.6
  6. Study on the Chimisorption Removal of FCC Gasoline Sulfur Compound,TE624.55
  7. Experiment Study of the Biogas Purification Process by Zeolite Filling Washing,TQ221.11
  8. Identification of B.melitensis 16M Protein Immunodominant Antigens,S852.61
  9. The Application of Eggshell Membrane for Solid-phase Extraction and the Determination of Trace Metal Elements in Environment Water,X832
  10. The Research of the Sludge Characteristics in the Cephalosporin Intermediate Pharmaceutical Wastewater by the Treatment of the NMBR,X787
  11. Study on the Processing of Citrus Segment Membrane Peeling with the Method of Fermented and Enzymatic Combination,TS295.6
  12. Treatment of High Concentration Oil-Bearing Wastewater in Food Industry with Membrane Biofilm Reactor (MBR),X792
  13. The Effect and Influence Factors of Novel Loop Membrane Bioreactor for Treating the Cephalosporin Intermediate Wastewater,X787
  14. Equipment Research of the Ship Sewage Treatment,X703
  15. Cationic Microemulsion-mediated Synthesis of MFI Zeolite,TQ424.25
  16. Preparation of Polysulfonate Ultrafiltration Membrane and Application on Oil Decolorization,TQ320.721
  17. Study on the Treatment of Domestic Wastewater by Sequencing Batch Membrane Bioreactor,X703
  18. Nutritional composition aplastic anemia mice effect of mitochondrial damage restoration,R556.5
  19. Alginate - chitosan membrane in guided bone regeneration in applied research,R318.08
  20. The Function Research of Mycobacterium Tuberculosis with Rv1272 and Rv1273,R378.911
  21. Biodegradable Polymeric Drug Nano Carriers for Targeted Combinational Therapy of Cancers,R730.5

CLC: > Industrial Technology > Chemical Industry > Reagents and the production of pure chemicals > Adsorbent > Inorganic adsorbent > Used as artificial silicate adsorbent
© 2012 www.DissertationTopic.Net  Mobile