Modification of polyimide membranes for gas separation
Modification of polyimide membranes for gas separation
... MODIFICATION OF POLYIMIDE MEMBRANES FOR GAS SEPARATION XIAO YOUCHANG (B Sc, Xiamen University, China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL ... Cross-linking Modification of Polyimide Membranes Induced by Amino Terminated Dendrimers……………………………………… 170 8.1.2 Carbonization of Polyimide Membranes to Enhance the Gas Separation Performance…………………………………………………………….172 ... trade-off curve for gas permeability and selectivity The aim of this study was to investigate two different modification methods for polyimide membranes to improve their separation performance...
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Fabrication and characterization of composite membranes for gas separation
... Comparison of separation performance for hollow fiber membranes between the O2/N2 mixed gas and pure gas measurements……… … 245 Table B.3 Comparison of separation performance for hollow fiber membranes ... FABRICATION AND CHARACTERIZATION OF COMPOSITE MEMBRANES FOR GAS SEPARATION JIANG LANYING (B Sci., Wuhan University, P R China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHYLOSPHY ... application of gas separation is the separation of noncondensible gases such as Nitrogen enrichment from air, natural gas purification, and Hydrogen recovery from nitrogen and refinery 1.2.1 Nitrogen and...
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Polymers of intrinsic microporosity (PIM) based membranes for gas separation
... for gas separation .4 1.3 Technology milestones of gas separation membranes .6 1.4 New classes of membrane materials 1.5 Polymers of intrinsic microporosity (PIMs) based membranes ... POLYMERS OF INTRINSIC MICROPOROSITY (PIM)- BASED MEMBRANES FOR GAS SEPARATION YONG WAI FEN (B Eng (Chemical) (Hons.), University Putra Malaysia) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF ... Table 7.4 Comparison of gas separation performance of PIM-1/Matrimid (10:90) hollow fiber membranes before and after heat treatment .181 Table 7.5 Gas separation performance of PIM-1/Matrimid...
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Development of mixed matrix membranes for gas separation application
... multitude applications of gas separation membranes are listed in Table 1.2 The major applications for gas separation membranes are discussed Table 1.2: Industrial applications of gas separation membranes ... development of membrane gas separation technology [14] Figure 1.2: Milestones on the development of membrane gas separations [14] 1.2 IMPORTANCE OF GAS SEPARATIONS USING MEMBRANES Membrane gas separation ... fiber membranes between the O2/N2 mixed gas and pure gas measurements……… 245 Table B.3 Comparison of separation performance of hollow fiber membranes between the CO2/CH4 mixed gas and pure gas...
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Modification of polymeric membranes for energy sustainability and CO2 capture 2
... (POSS) for carbon dioxide/hydrogen (CO2/ H2) and carbon/nitrogen (CO2/ N2) separation A high CO2 permeability of 380 Barrer with a moderate CO2/ N2 selectivity of 39.1 and a CO2/ H2 selectivity of 7.0 ... parameters of glassy polymers 2. 3 .2. 1 Sorption…………………………………………… 18 2. 3 .2. 2 Diffusion…………………………………………… 20 2. 3 .2. 3 Permeability………………………………………… .21 2. 3 .2. 4 Selectivity………………………………………… 22 2. 3.3 Effect of ... Figure 7.7 Pressure effect on (a) H2, N2 and CO2 permeability and (b) ideal CO2/ H2 and CO2/ N2 selectivity (c) relative CO2 permeability with conditioning at bar for PEA:POSS 50:50 membrane…………………….130...
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Thermally rearranged polymeric membranes for gas separation
... Literature review on thermally rearranged membranes for gas separation Thermally rearranged polymer membranes were studied for gas separation since 1990s Okamoto et al [19] studied the gas permeability ... Objective 1.1 Membranes for gas separation 10 1.2 Highly permeable polymer membranes for gas separation 11 1.3 Thermally rearranged polymeric membranes 13 1.4 ... 91 Table 4.6: Pure gas permeation properties of thermally rearranged membranes 95 Table 5.1: Elemental analyses results for precursor and thermally rearranged membranes ...
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Dual layer asymmetric hollow fiber membranes for gas separation
... coextrusion dual- layer hollow fiber formation • Morphology characterization on resultant dual- layer hollow fibers • Examination of gas separation performance of resultant dual- layer hollow fibers ... delamination-free dual- layer membranes 122 5.3.2 Fabrication of 6FDA–durene–mPDA/PES dual- layer membranes for gas separation 5.3.3 126 Separation performance of 6FDA–durene–mPDA/PES dual- layer membranes ... Conclusion x Summary We have studied the fabrication of dual- layer asymmetric hollow fiber composite membranes for gas separation The dual- layer composite membranes were prepared by simultaneously extruding...
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Surface modification of ferromagnetic nanoparticles for separation of toxic heavy metals and environmental applications
... SURFACE MODIFICATION OF FERROMAGNETIC NANOPARTICLES FOR SEPARATION OF TOXIC HEAVY METALS AND ENVIRONMENTAL APPLICATIONS ZAYED BIN ZAKIR SHAWON B.Sc (Chemical ... cost of separation of detrimental pollutants like heavy metals Recently, scientists have focused on the development of the nanomaterials as adsorbents for the separations of biomolecules, heavy metals, ... to remove toxic heavy metals from wastewater Ferromagnetic nanoparticles are superparamagnetic and offer very fascinating physical and chemical properties The adsorption capability of these nanoadsorbents...
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Fundamentals of hollow fiber formation for gas separation
... evaporation of low boiling solvents is the key factor for the formation of defect-free gas separation hollow fiber membranes [17, 21] 1.1.3 The effects of air-gap on hollow fiber formation Air-gap ... and Literature Review on Hollow Fiber Formation for Gas Separation ……… ……………………………….1 1.1 Formation of hollow fiber membranes by phase inversion………………………… 1.1.1 The effect of dope composition and ... FUNDAMENTALS OF HOLLOW FIBER FORMATION FOR GAS SEPARATION PENG NA (B Eng, Dalian University of Technology, P R China) A THESIS SUBMITTED FOT THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF...
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Development of chitosan based blend hollow fiber membranes for adsorptive separation in environmental engineering and bioengineering applications
... DEVELOPMENT OF CHITOSAN- BASED BLEND HOLLOW FIBER MEMBRANES FOR ADSORPTIVE SEPARATION IN ENVIRONMENTAL ENGINEERING AND BIOENGINEERING APPLICATIONS LIU CHUNXIU (B.Sc., ... spectra of CS and Pure CA hollow fiber membranes and CS/CA blend hollow fiber membranes 0.5-26.5-OH and 1-26-OH 64 Figure 3.4 XRD diffractograms of CS and Pure CA hollow fiber membranes and ... properties and applications of the membranes in adsorption based separation in water or wastewater treatment and bioengineering Specifically, cellulose acetate was adopted as blending polymer in this...
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Regulating Phytonutrient Levels in Plants – Toward Modification of Plant Metabolism for Human Health
... 2002) 12 Regulating Phytonutrient Levels in Plants 311 12.5.4 Metabolic Engineering of the Flavonoid Biosynthetic Pathway in Tomato There is a growing interest in producing food plants with increased ... underlie the importance of 12 Regulating Phytonutrient Levels in Plants 293 light-responsive hp mutations in modulating phytonutrient content in plants, either on their own or in combination with other ... effects among phytonutrients which are important to human health Increasing the levels of phytonutrients in plant species that normally not contain high levels of these ingredients, including cereals,...
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Synthesis and characterization of semiconducting nanowires for gas sensing
... the electrical and gas sensing behavior of ZnO nanowires Fig Characteristics of In3 O2 nanowires: (a) SEM image of In3 O2 nanowires, (b) TEM image of nanowire 70 nm in width, and (c) ED pattern ... image of a nanowire, and (e) linescan of the HAADF signal (solid line) and numerical fit of the shape of the nanowire (dashed line) As both composition and phase can be considered uniform for the ... useful for investigation of the termination of the nanowire lateral sides and apex Electron diffraction (ED) and analysis of zero-order and higher-order Laue-zones allows precise determination of...
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Development of multifunctional membranes for visual detection and adsorptive removal of heavy metal ions from aqueous solutions
... DEVELOPMENT OF MULTIFUNCTIONAL MEMBRANES FOR VISUAL DETECTION AND ADSORPTIVE REMOVAL OF HEAVY METAL IONS FROM AQUEOUS SOLUTIONS ZHANG LINZI (B Eng., Xi’an Jiaotong ... to develop multifunctional membranes for visual detection and removal of heavy metal ions in aqueous solutions Lead (Pb), mercury (Hg) and cadmium (Cd) were selected as the target ions due to ... 2.5 Significance of this study 32 CHAPTER DEVELOPMENT OF A NOVEL MULTIFUNCTIONAL MEMBRANE FOR VISUAL DETECTION AND ADSORPTIVE REMOVAL OF LEAD(II) IONS IN AQUEOUS SOLUTIONS 34 3.1...
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The development of pervaporation membranes for alcohol dehydration
... THE DEVELOPMENT OF PERVAPORATION MEMBRANES FOR ALCOHOL DEHYDRATION QIAO XIANGYI (MSc (Env Eng.), NUS) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL ... co-polyimide membranes for the pervaporation dehydration of IPA 9.1.3 169 The sorption, swelling and permeation characteristics of P84 co-polyimide membranes for pervaporation dehydration of alcohols ... and the investigation of the effects of modifications 16 on membrane performance This study will focus on the pervaporation dehydration of alcohols, particularly dehydration of IPA because of...
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Polyimides modifications and carbon molecular sieves derived from polyimides for gas separation
... modification 13 iii Polyimides Modifications and Carbon Molecular Sieves Derived from Polyimides for Gas Separation Shao Lu 1.4 Carbon Molecular Sieve Membranes (CMSMs) for Gas Separation 14 1.5 ... Polyimides Modifications and Carbon Molecular Sieves Derived from Polyimides for Gas Separation Shao Lu LIST OF TABLES Table 1.1 Membrane gas separation companies; membranes/modules and gas separations ... commercial gas separation membranes Table 1.1 shows the information on the larger -2- Polyimides Modifications and Carbon Molecular Sieves Derived from Polyimides for Gas Separation Shao Lu gas separation...
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