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 ...

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...

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...

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...

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...

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...

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...

Tailoring the properties of glassy polymeric membranes for energy development

... TAILORING THE PROPERTIES OF GLASSY POLYMERIC MEMBRANES FOR ENERGY DEVELOPMENT LI FUYUN B Tech (Hons.), NUS A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL ... porous or nonporous, the gas transport mechanisms vary from one to another The former is for the separation of gases on the basis of their molecular size through the small pores in the membrane matrix, ... performance of the original and the thermally cross-linked PIM-1 membranes (Tested at 35 oC and 3.5 atm) …… 112 Table 5.2 PAL results of the original and the thermally cross-linked PIM-1 xix membranes...

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...

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...

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...

Membrane materials and fabrication for gas separation

... Membrane Gas Separation ………………………….9 1.2 Industrial Applications of Membrane Gas Separation …………………….10 1.3 Engineering Principles for Membrane Gas Separation ……………………14 1.3.1 Membrane Materials ... necessities for successful gas separation membranes and strategies for the design of membranes systems must be identified In general, the chemical engineering of membranes for gas separation can ... applications of gas separation membranes are listed in Table 1.4 The major applications for gas separation membranes are discussed Table 1.4 Industrial Applications of Gas Separation Membranes (Spillman...

Polymeric gas separation membranes for carbon dioxide removal

... Introduction 1.1 Membrane Technology for Gas Separations 1.2 History of Gas Separation Membranes 1.3 Applications Based on Gas Separation Membranes 1.3.1 Hydrogen recovery ... [5]), liquid -gas (gas contactor [6]) and gas- gas separation (gas separation [7]) Compared to the convention separation processes, e.g., distillation or extraction, membrane based separations are ... Membrane Technology for Gas Separations Due to the extremely small size of the separation targets, gas separation membranes are usually thin selective barriers between two gas phases The gradient...

Polymeric membranes based on CO2 philic materials for hydrogen purification and flue gas treatment

... POLYMERIC MEMBRANES BASED ON CO2- PHILIC MATERIALS FOR HYDROGEN PURIFICATION AND FLUE GAS TREATMENT CHEN HANG ZHENG (B Eng., National University of Singapore, Singapore) A THESIS SUBMITED FOR ... 687-689 [7] Song C, Introduction to hydrogen and syngas production and purification technologies In: Liu K, Song C, Subramani V, editors Hydrogen and syngas production and purification technologies, ... form composite hollow VII fiber membranes for flue gas treatment Owing to the strong interaction between membrane materials and CO2, the membranes possess higher CO2 permeability than other gases...

Polymeric based membranes for hydrogen enrichment and natural gas sweetening

... debate and the use of natural gas and hydrogen is recommended to alleviate global warming Membrane technology is a promising purification technique for hydrogen enrichment and natural gas sweetening ... technologies for hydrogen production via coal gasification [6] Natural gas and hydrogen (derived from natural gas and coal) emerge as the vital alternative fuels to lessen greenhouse gas emission and ... infrastructure for the storage and distribution of hydrogen, natural gas is often seen as a bridging fuel source towards a hydrogen -based economy The projected growth in the demand for hydrogen and natural...

Xem thêm