Carbon Dioxide Separation by Polyethylene Glycol and Glutamic Acid/Polyvinyl Alcohol Composite Membrane

In this study, Polyvinyl alcohol (PVA) blended with Polyethylene glycol (PEG), Monosodium glutamate (MSG) and Glutamic acid (GA) was cast on a reverse osmosis membrane to form a composite membrane. It is expected that the ether group can increase the CO2 affinity of the membrane. Sodium tetraborate (Borax) as a crosslinker can increase membrane basicity and glutamic acid (salt) can provide an enhanced transport mechanism, thereby improving the permeability and selectivity of carbon dioxide. FTIR spectra show that the thickness of coating is sufficiently low, while SEM results show that PVA-PEG series have a dense surface, and particles are observed on the surface of MSG/GA series. The gas permeance and separation performance of the composite membrane was tested using a single gas. Results showed that CO2 had higher permeance (GPU) at lower pressure differential. PEG with an ether group had the greatest effect on improving CO2 permeance and selectivity. However, MSG and GA with amine groups could not effectively improve CO2 selectivity due to solubility. The best coating solution was provided by PVA-PEG-1.2. The CO2 selectivity of the composite membrane was 10.05 with a pressure differential of 1.00 bar in a humid environment and no obvious deterioration was observed over a 10-day period. Borax can improve selectivity, water absorption, and thermal stability while avoiding the need for high temperature and long crosslinking time of aldehydes, which makes it possible to be used in a PVA carbon dioxide separation membrane.

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Poly(amide-12-b-ethylene oxide)/polyethylene glycol blend membranes for carbon dioxide separation

Separation and Purification Technology ◽

10.1016/j.seppur.2013.05.002 ◽

2013 ◽

Vol 116 ◽

pp. 25-34 ◽

Cited By ~ 54

Author(s):

Shichao Feng ◽

Jizhong Ren ◽

Kaisheng Hua ◽

Hui Li ◽

Xiaoling Ren ◽

...

Keyword(s):

Carbon Dioxide ◽

Polyethylene Glycol ◽

Ethylene Oxide ◽

Carbon Dioxide Separation ◽

Blend Membranes

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Enhancing hydrogen gas separation performance of thin film composite membrane through facilely blended polyvinyl alcohol and PEBAX

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.09.079 ◽

2020 ◽

Author(s):

Kar Chun Wong ◽

Pei Sean Goh ◽

Ahmad Fauzi Ismail

Keyword(s):

Thin Film ◽

Polyvinyl Alcohol ◽

Gas Separation ◽

Composite Membrane ◽

Hydrogen Gas ◽

Separation Performance ◽

Film Composite ◽

Thin Film Composite Membrane ◽

Thin Film Composite ◽

Gas Separation Performance

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Ether-functionalized ionic liquid based composite membranes for carbon dioxide separation

RSC Advances ◽

10.1039/c6ra04285f ◽

2016 ◽

Vol 6 (51) ◽

pp. 45184-45192 ◽

Cited By ~ 27

Author(s):

Jing Deng ◽

Lu Bai ◽

Shaojuan Zeng ◽

Xiangping Zhang ◽

Yi Nie ◽

...

Keyword(s):

Carbon Dioxide ◽

Ionic Liquid ◽

Cellulose Acetate ◽

Composite Membranes ◽

Separation Performance ◽

Carbon Dioxide Separation ◽

Functionalized Ionic Liquid

The cellulose acetate and ether-functionalized pyridinium-based ionic liquid composite membranes has been designed to improve CO2 separation performance.

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Preparation and characterization of PVA thin-film composite membrane for pervaporation dehydration of ethanol solution

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/947/1/012010 ◽

2021 ◽

Vol 947 (1) ◽

pp. 012010

Author(s):

Phuong Thanh Ngoc Thai ◽

Xuan Minh Pham ◽

Thuc Ba Nguyen ◽

Thu Minh Le ◽

Chau Bao Viet Tran ◽

...

Keyword(s):

Thin Film ◽

Polyvinyl Alcohol ◽

Composite Membrane ◽

Separation Performance ◽

Permeation Flux ◽

Ethanol Fuel ◽

Film Composite ◽

Thin Film Composite Membrane ◽

Thin Film Composite ◽

High Separation

Abstract These days, ethanol fuel has been widely consumed worldwide to replace gasoline due to its possible environmental and long-term economic advantages. In detail, the ethanol fuel (purity ≥ 99.5 wt%) has been produced by traditional separation processes such as azeotropic distillation or molecular sieve adsorption, which excessively employs energy and capital cost. The pervaporation has already been considered as an effective alternative to conventional methods because of its high separation efficiency and low power consumption. Pervaporation separation of ethanol/water solution using hydrophilic membranes has been extensively studied owing to their superior perm-selectivity. In this present work, the polyvinyl alcohol thin-film composite membrane is prepared by casting a thin crosslinked polyvinyl alcohol (PVA) film on the polyacrylonitrile (PAN) porous substrate. The effect of PVA concentration on the pervaporation performance of the fabricated membrane is studied. The physicochemical properties of the prepared membrane are characterized using FTIR, SEM images, and contact angle measurements. The separation performance in terms of permeation flux and selectivity is simultaneously evaluated through a pervaporation dehydration of ethanol/water mixture of 80/20 wt.% at 60°C. The results show that the increase in PVA concentration leads to the decline in the hydrophilicity and the growth of the thickness and swelling degree of the membrane. Therefore, the selectivity of the membrane is found to improve significantly, while the permeation flux decreased with the PVA concentration ranging from 2.5 to 15 wt.%. Based on the results, the PVA membrane prepared from the 10 wt.% concentration is likely to provide high separation performance.

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