Recent development on the effect of water/moisture on the performance of zeolite membrane and MMMs containing zeolite for gas separation; review

Understanding the effects of water vapour on gas permeation and separation properties of zeolite membranes especially at lower temperatures is important for the applications of these zeolite membranes for gas separations involving water vapour.

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H2/CO2 Gas Separation Characteristic of Zeolite Membrane at High Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.26-28.267 ◽

2007 ◽

Vol 26-28 ◽

pp. 267-270

Author(s):

Woo Teck Kwon ◽

Soo Ryong Kim ◽

Eun Bi Kim ◽

Seong Youl Bae ◽

Y. Kim

Keyword(s):

Gas Separation ◽

Coal Gasification ◽

Hydrothermal Reaction ◽

Low Cost ◽

Porous Alumina ◽

Hydrogen Permeability ◽

Combined Cycle ◽

Zeolite Membrane ◽

Alumina Support ◽

Zeolite Membranes

Due to the need for CO2 sequestration associated with H2 production from fossil fuels, zeolite membrane are very promising due to their low cost, high stability and high permeance. Recently, the faujasite(FAU), the silica/aluminophophate(SAPO-4) framework family of zeolite have been studied for CO2 gas separation. In our study, ZSM-5 membrane was prepared on the porous alumina support using a hydrothermal technique. The thickness of zeolite membrane was controlled by the hydrothermal reaction time and temperature. The prepared zeolite membranes were characterized with SEM and thin film XRD. The hydrogen permeability and selectivity toward carbon dioxide gas were 0.6x 10-6 mole/m2.s.pa and 3.16, respectively. The hydrogen selective zeolite membranes show promising application in hydrogen separation from coal gasification such as Integrated Gasification Combined Cycle (IGCC).

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Gas Permeation Properties of High-Silica CHA-Type Zeolite Membrane

Membranes ◽

10.3390/membranes11040249 ◽

2021 ◽

Vol 11 (4) ◽

pp. 249

Author(s):

Yasuhisa Hasegawa ◽

Chie Abe ◽

Mayumi Natsui ◽

Ayumi Ikeda

Keyword(s):

Molecular Size ◽

Gas Permeation ◽

Zeolite Membrane ◽

Type Zeolite ◽

High Silica ◽

Separation Of Co2 ◽

Α Al2o3 ◽

Separation Performances ◽

Molecular Sieving ◽

Permeation Properties

The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-Al2O3 tube in this study, and the gas permeation properties were determined using single-component H2, CO2, N2, CH4, n-C4H10, and SF6 at 303–473 K. The membrane showed permeation behavior, wherein the permeance reduced with the molecular size, attributed to the effect of molecular sieving. The separation performances were also determined using the equimolar mixtures of N2–SF6, CO2–N2, and CO2–CH4. As a result, the N2/SF6 and CO2/CH4 selectivities were as high as 710 and 240, respectively. However, the CO2/N2 selectivity was only 25. These results propose that the high-silica CHA-type zeolite membrane is suitable for the separation of CO2 from CH4 by the effect of molecular sieving.

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Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases

Nanomaterials ◽

10.3390/nano11030582 ◽

2021 ◽

Vol 11 (3) ◽

pp. 582

Author(s):

Fernando Pardo ◽

Sergio V. Gutiérrez-Hernández ◽

Carolina Hermida-Merino ◽

João M. M. Araújo ◽

Manuel M. Piñeiro ◽

...

Keyword(s):

Ionic Liquid ◽

Gas Separation ◽

Value Added ◽

Gas Permeation ◽

Mixed Matrix Membranes ◽

Separation Performance ◽

Mixed Gas ◽

Neat Polymer ◽

Stable Suspension ◽

Base Polymer

Membrane technology can play a very influential role in the separation of the constituents of HFC refrigerant gas mixtures, which usually exhibit azeotropic or near-azeotropic behavior, with the goal of promoting the reuse of value-added compounds in the manufacture of new low-global warming potential (GWP) refrigerant mixtures that abide by the current F-gases regulations. In this context, the selective recovery of difluorometane (R32, GWP = 677) from the commercial blend R410A (GWP = 1924), an equimass mixture of R32 and pentafluoroethane (R125, GWP = 3170), is sought. To that end, this work explores for the first time the separation performance of novel mixed-matrix membranes (MMMs) functionalized with ioNanofluids (IoNFs) consisting in a stable suspension of exfoliated graphene nanoplatelets (xGnP) into a fluorinated ionic liquid (FIL), 1-ethyl-3-methylpyridinium perfluorobutanesulfonate ([C2C1py][C4F9SO3]). The results show that the presence of IoNF in the MMMs significantly enhances gas permeation, yet at the expense of slightly decreasing the selectivity of the base polymer. The best results were obtained with the MMM containing 40 wt% IoNF, which led to an improved permeability of the gas of interest (PR32 = 496 barrer) with respect to that of the neat polymer (PR32 = 279 barrer) with a mixed-gas separation factor of 3.0 at the highest feed R410A pressure tested. Overall, the newly fabricated IoNF-MMMs allowed the separation of the near-azeotropic R410A mixture to recover the low-GWP R32 gas, which is of great interest for the circular economy of the refrigeration sector.

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Optical, thermal and gas separation properties of acetate-containing copoly(ether-imide)s based on 6FDA and fluorenyl diamines

High Performance Polymers ◽

10.1177/0954008318822118 ◽

2019 ◽

Vol 31 (9-10) ◽

pp. 1101-1111 ◽

Cited By ~ 2

Author(s):

Yunhua Lu ◽

Jican Hao ◽

Guoyong Xiao ◽

Lin Li ◽

Zhizhi Hu ◽

...

Keyword(s):

Gas Separation ◽

Gas Permeation ◽

Light Transmittance ◽

Step Method ◽

Ether Linkage ◽

Nuclear Magnetic Resonance Spectrometer ◽

Thermogravimetric Analyzer ◽

Structures And Properties ◽

Infrared Spectrometer ◽

The Ideal

The diamine, 9,9-bis[4-(4-amino-3-hydroxylphenoxy)phenyl]fluorene (BAHPPF) was synthesized by the modified two-step method. Then, a series of acetate-containing copoly(ether-imide)s were prepared by the copolymerization of BAHPPF, 9,9-bis(4-aminophenyl)fluorene (BAF) and 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) followed by chemical imidization. The structures and properties of the BAHPPF and copoly(ether-imide)s were characterized by nuclear magnetic resonance spectrometer (NMR), Fourier transform infrared spectrometer (FTIR), X-ray diffractometer (XRD), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), ultraviolet-visible spectrophotometer (UV-VIS), and tensile testing. Single gas permeation performances of these copoly(ether-imide)s were also studied for five representative gases of interest including H2, O2, N2, CO2, and CH4. The experimental results showed that the copoly(ether-imide)s showed excellent optical properties with high light transmittance above 80.2% at 450 nm. The glass transition temperature of these copolymers were higher than 333°C. Their tensile strength and Young’s module also increased, and the elongation decreased with the decrease of BAHPPF. High gas permeabilities of copoly(ether-imide)s were obtained, and the ideal selectivity of CO2/CH4 was improved due to the introduction of acetate group and flexible ether linkage. These copoly(ether-imide)s could be applied to the field of optics and gas separation.

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Separation of Methane from Shuttle Tanker Vents Gases by Adsorption on a Polyurethane/Zeolite Membrane

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.733.42 ◽

2017 ◽

Vol 733 ◽

pp. 42-46

Author(s):

Habiba Shehu ◽

Edidiong Okon ◽

Edward Gobina

Keyword(s):

Carbon Dioxide ◽

Physical Properties ◽

Crude Oil ◽

Deep Water ◽

Separation Factor ◽

Gas Permeation ◽

Zeolite Membrane ◽

Alumina Support ◽

Molar Flux

Shuttle tankers are becoming more widely used in deep water installations as a means of transporting crude oil to storage plants and refineries. The emissions of hydrocarbon vapours arise mainly during loading and offloading operations. Experiments have been carried out on the use of polyurethane/zeolite membrane on an alumina support for the separation of methane from carbon dioxide and oxygen. The physical properties of the membrane were investigated by FTIR. Single gas permeation tests with methane, propane, oxygen and carbon dioxide at a temperature of 293 K and pressure ranging from 0.1 to 1.0 x 10-5 Pa were carried out. The molar flux of the gases through the membrane was in the range of 3 x 10-2 to 1 x 10-1 molm-2s-1. The highest separation factor of CH4/CO2 and CH4/O2 and CH4/C3H8 was determined to be 1.7, 1.7 and 1.6 respectively.

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Screening the Effect of Water Vapour on Gas Adsorption Performance: Application to CO2Capture from Flue Gas in Metal-Organic Frameworks

ChemSusChem ◽

10.1002/cssc.201601816 ◽

2017 ◽

Vol 10 (7) ◽

pp. 1543-1553 ◽

Cited By ~ 40

Author(s):

Nicolas Chanut ◽

Sandrine Bourrelly ◽

Bogdan Kuchta ◽

Christian Serre ◽

Jong-San Chang ◽

...

Keyword(s):

Water Vapour ◽

Flue Gas ◽

Gas Adsorption ◽

Metal Organic Frameworks ◽

Adsorption Performance ◽

Effect Of Water ◽

Metal Organic

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Effect of Water Vapour on Explosions of Carbon Monoxide

Nature ◽

10.1038/170838b0 ◽

1952 ◽

Vol 170 (4333) ◽

pp. 838-839 ◽

Cited By ~ 2

Author(s):

D. E. HOARE ◽

A. D. WALSH

Keyword(s):

Carbon Monoxide ◽

Water Vapour ◽

Effect Of Water

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Microwave-Assisted Synthesis and Permeation Performance of NaA Zeolite Membrane by Secondary Growth Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1053.389 ◽

2014 ◽

Vol 1053 ◽

pp. 389-393

Author(s):

Zhi Lin Cheng ◽

Ying Ying Liu

Keyword(s):

Gas Permeability ◽

Knudsen Diffusion ◽

Secondary Growth ◽

Zeolite Membrane ◽

Microwave Assisted Synthesis ◽

Vapor Phase Transport ◽

Zeolite Membranes ◽

Synthesis Time ◽

Naa Zeolite ◽

Naa Zeolite Membrane

The highly intergrown NaA zeolite membranes on seeded α-Al2O3substrate were synthesized by microwave heating method. The preparation of seeds with the size of ca.120nm employed the vapor phase transport method (VPT). The XRD patterns indicated that the pure NaA zeolite membranes formed on the seeded α-Al2O3substrate for varied synthesis times. However, the peak intensity of NaA zeolite membrane with synthesis time of 50min obviously decreased, suggesting that the NaA membrane could take place the dissolution at that time. The SEM images indicated that the NaA zeolite membranes with synthesis time of 15-30min had a good integrity and consisted of highly intergrown zeolite crystals, but the NaA membrane with synthesis time of 50min appeared some large defects, further verifying the result of XRD pattern. The gas permeability showed that the maximum of H2/N2and H2/C3H8permselectivities attained 4.23 and 8.24, respectively, higher than those of the corresponding Knudsen diffusion. These results suggested that the diffusion of gases, at least in part, are affected by the pore size of zeolite and the function of molecular sieving can be embodied on the synthesized membrane.

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