b eng university of science and technology beijing

Molecular simulation of gas permeation and separation in polymer membranes

... University of Technology M Eng. , Tianjin University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL AND BIOMOLECULAR ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE ... components A and B is estimated by the ratio of their permeabilities α= PA PB (1-4) where PA and PB are the permeability of components A and B, respectively The selectivity can be calculated ... [BMIM][TF2N] (b) p100 [BMIM][SCN] (c) poly([VBIM][TF2N]) (d) poly([VBIM][SCN]) (e) poly([VBIM][PF6]) and (f) poly([VBIM][Cl]) membranes The blue regions are voids and the grey regions are membrane...

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Molecular simulations for CO2 capture in metal organic frameworks

Danh mục: Y - Dược

... YIFEI (B. Eng. , Hebei University of Technology, M Eng. , Tianjin University, Tianjin, China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF ENGINEERING DEPARTMENT OF CHEMICAL AND BIOMOLECULAR ENGINEERING ... 5-aminottrazole B3 LYP Becke, three-parameter, Lee-Yang-Parr BDC benzenedicarboxylate bpy bipyridine bipy 4,4’-bipyridine BSSE basis set superposition error BTC 1,3,5-benzenetricarboxylate CCS carbon capture ... have been omitted for clarity.5 To date, tens of thousands of MOFs have been synthesized and characterized Based on the framework flexibility, MOFs can be categorized into rigid and flexible The...

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Modification of polymeric membranes for energy sustainability and CO2 capture 2

Danh mục: Cao đẳng - Đại học

... MODIFICATION OF POLYMERIC MEMBRANES FOR ENERGY SUSTAINABILITY AND CO2CAPTURE CHUA MEI LING (B. Eng (CBE), NTU) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL AND BIOMOLECULAR ... selectivity of gas A to gas B was obtained by taking the ratio of the pure gas permeability of A to B, as shown in Equation2.2  A/ B  PA PB (2.2) Based on the solution-diffusion model, the permeability ... integrity of polymer backbone is kept and (4) resistance to plasticization 30 2.4 Gas transport in rubbery polymers Rubbery polymers are solution-selective The separation of gases through rubbery membranes...

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Báo cáo hóa học: " Synthesis of silicalite-poly(furfuryl alcohol) composite membranes for oxygen enrichment from air" docx

Danh mục: Hóa học - Dầu khí

... membrane had an O2 permeability of 1,550 Barrers and an O2/N2 separation of 2.98 [29] In our case, high gas permeability may be contributed from diffusion of gas through large pores (5.5 Å) of ... polysulfone substrate and PFA, and silicalite-PFA composite membranes Figure SEM images of the cross-section view of the membranes (a) PFA composite membrane and (b) 10% Sil-PFA composite membrane He ... temperature of 20°C, the membrane had an oxygen permeability of 233.3 Barrers and an O2/N2 selectivity of 3.52 As the temperature increased to 50°C, oxygen permeability increased to 233.3 Barrers, and...

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Poly(2,6 dimethyl 1,4 phenylene oxide) based semi interpenetrating polymer network proton exchange membranes for direct methanol fuel cells

Danh mục: Y - Dược

... spectra of (a) BPPO, (b) blend membrane of SPPO and aminated BPPO and (c) RDE1.0 membrane 90 Figure 5.4 TEM images of SIPN membranes: (a) BDE0.5, (b) RDE0.5, (c) BADE0.5, (d) PBAE0.5 ... TEM images of SIPN membranes: (a) BADE0.25, (b) BADE0.5, (c) BADE0.75, (d) BADE1.0 95 Figure 5.10 TEM images of SIPN membranes: (a) PBAE0.25, (b) PBAE0.5, (c) PBAE0.75, (d) PBAE1.0 ... 76 Table 4.2 IEC, proton conductivity and water uptake of SIPN and SPPO/BPPO blend membranes 77 Table 4.3 Dimensional changes in SIPN and SPPO/BPPO blend membranes 78 Table 5.1...

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Development of ionic liquid based liquid phase microextraction, and zeolite imidazolate frameworks based sorbent phase based microextraction combined with chromatography for applications in environmental analysis

Danh mục: Y - Dược

... PAHs A fiber contains at least of 92% by weight of carbon in a material was termed as carbon fiber The proportion of graphite in a carbon fiber can range from to 100% In their work, a fiber containing ... Singapore, between 03/08/2008 and 03/08/2012 The content of the thesis has been partly published in: 1) D Ge, H.K Lee, Water stability of zeolite imidazolate framework and application to porous membrane-protected ... sorbent The LODs were in the range of 0.3 and μg/l The results showed that IL-DLLME-μ-SPE was suitable for the determination of TCAs in water samples xii List of Tables Table 2-1 Structures and...

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Vapor phase polymerized thin films and seeding polymerized nanofibers membranes of poly (3,4 ethylenedioxythiophene) for optoelectronic applications

Danh mục: Tổng hợp

... Requirements for the Degree of Master of Science in Polymer Science and Engineering (Master Program) 2007 04 Sungkyunkwan University Department of Polymer Science and Engineering THUY LE TRUONG ... as a member of the project “Fabrication of nano carbon particles for applications in microelectronics and information recording” conducted by PhD Khe C Nguyen List of Publication and Submitted ... the stability of cation radical of EDOT during the VPP reaction (Scheme I-4c) The enhanced stability of cation radicals of both EDOT and oligomeric chains may be attributed to resonance stabilization...

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synthesis of iron oxide nanorods and nanocubes in an imidazolium ionic liquid

Danh mục: Vật lý

... of nanocubes and nanorods could be related to the biphasic nature of this IL-based process and favorable solubility of Fe(CO)5 in [BMIM][Tf2 N] ionic liquid [46,47] The biphasic behavior might ... combination of changing the concentrations of capping agents and subtle variation in temperature between about 280 and 310 ◦ C could results in the formation of iron oxide nanorods and possibly ... stretching vibrations of Fe(CO)5 , respectively Fig Proton NMR spectra of (A) pure [BMIM][Tf2 N] IL, (B) the mixture of Fe(CO)5 and oleic acid in [BMIM][Tf2 N] IL made at 110 ◦ C, and (C) [BMIM][Tf2...

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Membranes for Industrial Wastewater Recovery and Re-use ppt

Danh mục: Cơ khí - Chế tạo máy

... motivations and barriers Industrial water Membrane technology Membrane technology 2.1 2.2 2.3 2.4 The membrane I.1 Membrane and membrane process definition I Membrane structure I.3 Membrane materials and ... membrane processes for a wide range of applications within both urban and industrial environments He has contributed to and co-authored a number of books on both water recovery and reuse and ... lP1, demands a high degree of turbulence promotion to enhance the flux In the submerged system turbulence promotion is provided by coarse bubble aeration It has been shown by a number of researchers...

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membrane technology volume 3 membranes for food applications

Danh mục: Hóa học - Dầu khí

... List of Contributors Solomon Bogale Kassa Addis Ababa University, Faculty of Technology Department of Chemical Engineering P.O Box 385 Addis Ababa Ethiopia and Wageningen University, Dept Agrotechnology ... inadvertently be inaccurate Library of Congress Card No.: applied for British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library Bibliographic ... information published by the Deutsche Nationalbibliothek The Deutsche Nationalbibliothek lists this publication in the Deutsche Nationalbibliograﬁe; detailed bibliographic data are available on the...

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carbon based membranes for separation processes

Danh mục: Hóa học - Dầu khí

... (1 − λAB ) B (2.21) � DBA = DB0 − (1 − λBA ) B − (1 − B ) B − (1 − λBA )θA (2.22) � DBB = DB0 − (1 − λBA )θA − (1 − B ) B − (1 − λBA )θA (2.23) The cross-term λAB is defined as: � λAB = e−(εAV ... middle of the 1990s, carbon membranes supported on tubes were fabricated, followed by carbon capillary membranes and carbon hollow fiber membranes Flat sheet carbon membranes are more suitable for ... is the adsorbate mole fraction at the equilibrium To know qA and qB for the binary mixture adsorption � qA = nA qsA bA PA nA nB + bA PA + bB PB (2.31) is used and similarly for qB Finally, for...

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solvent extraction and liquid membranes

Danh mục: Hóa học - Dầu khí

... constants of chlorobenzenes and bromobenzenes and the number of halogen atoms in heptane/water and 1‑octanol/water systems and ε, μ, and α stand for the Lennard-Jones parameter, the dipole moment, and ... (2.13) The Gibbs free energy of solution, ΔGs, can be expressed by the sum of the Gibbs free energy for the cavity formation, Gc, and the interaction free energy between solute and solvent molecules, ... liquid–liquid and liquid membranes are common in chemical and mineral processing engineering curricula Because of the breadth of the subject, the treatment in such courses is often scarce, and more comprehensive...

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inorganic membranes for hydrogen production and purification a critical review and perspective

Danh mục: Khoa học tự nhiên

... the stability and durability of the membrane For hydrogen production and puriﬁcation, there are generally two classes of membranes both being inorganic: dense phase metal, metal alloys and ceramics ... membranes and dense membranes are available Most of the porous membranes reported have a pore diameter of about nm When comparing the performance of these porous membranes with Palladium membranes, ... integrity of Pd/Ag membrane that was destroyed by the poisoning The following summarizes the main limitations of Pd-based membranes for hydrogen separation Use of Pd membranes must be balanced...

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báo cáo hóa học: " The evolution of methods for the capture of human movement leading to markerless motion capture for biomechanical applications" pptx

Danh mục: Hóa học - Dầu khí

... sequence and subsequently tracked auto- (a) Selected background images (top) and separated subject data (bottom) Figure (a) Selected background images (top) and separated subject data (bottom) (b) ... level of accuracy that facilitates the study of the biomechanics of Page of 11 (page number not for citation purposes) Journal of NeuroEngineering and Rehabilitation 2006, 3:6 http://www.jneuroengrehab.com/content/3/1/6 ... stair-climbing Journal of Bone and Joint Surgery 1980, 62(A):749-757 Bell AL, Pedersen DR, Brand RA: A comparison of the accuracy of several hip center location prediction methods Journal of Biomechanics...

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Báo cáo y học: "Gold-ionic liquid nanofluids with preferably tribological properties and thermal conductivity" potx

Danh mục: Hóa học - Dầu khí

... properties of the Au/[Bmim] [PF6] nanofluids (samples and of Table 1) must be attributed to the existence of stable Au NPs but not 1-methylimidazole or CTABr To further verify that the stable Au/[Bmim][PF ... 200 and 400 N, the friction coefficients lubricated by the Au/[Bmim][PF6] nanofluids (samples 2, 3, and of Table 1) are slightly lower than that of pure [Bmim][PF6] (sample of Table 1), exhibiting ... effects of the stability of nanofluids on their properties, and (2) the improvements of properties of [Bmim][PF6] induced by the introduction of low amount of Au NPs [Bmim][PF6] has been used...

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Báo cáo hóa học: " Use of Ionic Liquid in Fabrication, Characterization, and Processing of Anodic Porous Alumina" pot

Danh mục: Hóa học - Dầu khí

... pieces of single face area S * 15 mm2, and ﬂattened back to roughly planar surface, after scissors curling, by pressing each of them between two new glass slides Degreasing was performed by hand brushing ... at RT and current density *10 JEP The hard Al etching was accompanied by a strong hydrogen bubbling at the cathode and by a typical noise, while quasi-periodic (1–2 Hz) Al spitting off between ... results of a morphological analysis of the outer APA surface of the samples fabricated during the anodizations of Fig are displayed By means of AFM, both the outer pore mouth diameter dout and the...

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Membranes for Industrial Wastewater Recovery and Re-use pot

Danh mục: Kĩ thuật Viễn thông

... motivations and barriers Industrial water Membrane technology Membrane technology 2.1 2.2 2.3 2.4 The membrane I.1 Membrane and membrane process definition I Membrane structure I.3 Membrane materials and ... membrane processes for a wide range of applications within both urban and industrial environments He has contributed to and co-authored a number of books on both water recovery and reuse and ... lP1, demands a high degree of turbulence promotion to enhance the flux In the submerged system turbulence promotion is provided by coarse bubble aeration It has been shown by a number of researchers...

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Membranes for Industrial Wastewater Recovery and Re-use potx

Danh mục: Kĩ thuật Viễn thông

... motivations and barriers Industrial water Membrane technology Membrane technology 2.1 2.2 2.3 2.4 The membrane I.1 Membrane and membrane process definition I Membrane structure I.3 Membrane materials and ... membrane processes for a wide range of applications within both urban and industrial environments He has contributed to and co-authored a number of books on both water recovery and reuse and ... lP1, demands a high degree of turbulence promotion to enhance the flux In the submerged system turbulence promotion is provided by coarse bubble aeration It has been shown by a number of researchers...

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Membranes for Industrial Wastewater Recovery and Re-use To Claire doc

Danh mục: Kĩ thuật Viễn thông

... motivations and barriers Industrial water Membrane technology Membrane technology 2.1 2.2 2.3 2.4 The membrane I.1 Membrane and membrane process definition I Membrane structure I.3 Membrane materials and ... membrane processes for a wide range of applications within both urban and industrial environments He has contributed to and co-authored a number of books on both water recovery and reuse and ... lP1, demands a high degree of turbulence promotion to enhance the flux In the submerged system turbulence promotion is provided by coarse bubble aeration It has been shown by a number of researchers...

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Membranes for Industrial Wastewater Recovery and Re-use_To Claire potx

Danh mục: Kĩ thuật Viễn thông

... motivations and barriers Industrial water Membrane technology Membrane technology 2.1 2.2 2.3 2.4 The membrane I.1 Membrane and membrane process definition I Membrane structure I.3 Membrane materials and ... membrane processes for a wide range of applications within both urban and industrial environments He has contributed to and co-authored a number of books on both water recovery and reuse and ... lP1, demands a high degree of turbulence promotion to enhance the flux In the submerged system turbulence promotion is provided by coarse bubble aeration It has been shown by a number of researchers...

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