Preparation of aromatic polyamide membrane for alcohol dehydration by pervaporation

Lee, Kueir‐Rarn; Wang, Yueh-Hua; Teng, Min-Yu; Liaw, Der‐Jang; Lai, Juin‐Yih

doi:10.1016/s0014-3057(98)00056-1

Cited by 15 publications

(4 citation statements)

References 15 publications

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“…This occurs because increased osmotic driving force impacts primarily the water transport (water chemical potential), while the ethanol driving force is fixed as the concentration difference between the feed and draw solutions. The increased water flux diluted the permeating ethanol by up to 34% for the TFC and 27% for the CTA, a result similar to that observed in works related to pervaporation experiments to dehydrate ethanol using hydrophilic crystalline polymers, such as poly(vinyl alcohol), , cellulose acetate, and polyamide . The ethanol fluxes varied between 0.1 and 0.2 kg m –2 h –1 for the TFC membrane and between 0.1 and 0.3 kg m –2 h –1 for the CTA during the FO experiments, without noticeable effect among different osmotic pressures.…”

Section: Results and Discussionsupporting

confidence: 83%

Transport of Components in the Separation of Ethanol from Aqueous Dilute Solutions by Forward Osmosis

Ambrosi

Al-Furaiji

McCutcheon

et al. 2018

Ind. Eng. Chem. Res.

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Membrane-based technologies have been considered for separation of ethanol/water mixtures as an alternative to thermal based separations. In this work, we consider forward osmosis (FO) for ethanol separation from aqueous solutions using commercial cellulose triacetate (CTA) and thin film composite (TFC) forward osmosis membranes. Aqueous solutions containing ethanol were used as feed solution and sodium chloride was used as osmotic agent for the tests. The total permeate flux and the reverse salt flux are increased with the increase of the osmotic pressure difference, while the ethanol–water separation factor is decreased. CTA and TFC membranes presented similar total permeate fluxes (from 4 to 8 kg m–2 h–1), but CTA presented lower reverse salt flux (below 5 g m–2 h–1) and higher separation factor (αethanol–water between 1 and 2). Additional tests using reverse osmosis (RO) were conducted to compare with the FO results.

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Section: Results and Discussionsupporting

confidence: 83%

Transport of Components in the Separation of Ethanol from Aqueous Dilute Solutions by Forward Osmosis

Ambrosi

Al-Furaiji

McCutcheon

et al. 2018

Ind. Eng. Chem. Res.

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“…The experiment was carried out according to a reported procedure [37]. The feed solution was in direct contact with membrane, in the pervaporation apparatus.…”

Section: Methanol Permeation Measurement By Pervaporation Processmentioning

confidence: 99%

Increases in the proton conductivity and selectivity of proton exchange membranes for direct methanol fuel cells by formation of nanocomposites having proton conducting channels

Liu

Wang

et al. 2009

Journal of Power Sources

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We explore an approach to effectively enhance the properties of cost-effective hydrocarbon protonexchange membranes for application in the direct methanol fuel cell (DMFC). This approach utilizes sulfonated silica nanoparticles (SA-SNP) as additives to modify sulfonated poly(arylene ether ether ketone ketone) (SPAEEKK). The interaction between the sulfonic acid groups of SA-SNP and those of SPAEEKK combined with hydrophilic-hydrophobic phase separation induce the formation of proton conducting channels, as evidenced by TEM images, which contribute to increases in the proton conductivity of the SPAEEKK/SA-SNP nanocomposite membrane. The presence of SA-SNP nanoparticles also reduces methanol crossover in the membrane. Therefore, the SPAEEKK/SA-SNP nanocomposite membrane shows a high selectivity, which is 2.79-fold the selectivity of Nafion ® 117. The improved selectivity of the SPAEEKK/SNP nanocomposite membrane demonstrates potential of this approach in providing hydrocarbon-based PEMs as alternatives to Nafion in direct methanol fuel cells.

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“…The experiment was carried out according to the reported process [27]. The feed solution was in direct contact with membrane, in the pervaporation apparatus.…”

Section: Methanol Permeation Measurement By Pervaporation Processmentioning

confidence: 99%

Proton exchange membranes modified with sulfonated silica nanoparticles for direct methanol fuel cells☆

Liu

Sun

et al. 2007

Journal of Membrane Science

153

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Nanocomposite proton exchange membranes were prepared from sulfonated poly(phthalazinone ether ketone) (sPPEK) and various amounts of sulfonated silica nanoparticles (silica-SO 3 H). The use of silica-SO 3 H compensates for the decrease in ion exchange capacity of membranes observed when non-sulfonated nano-fillers are utilized. The strong -SO 3 H/-SO 3 H interaction between sPPEK chains and silica-SO 3 H particles leads to ionic cross-linking in the membrane structure, which increases both the thermal stability and methanol resistance of the membranes. The membrane with 7.5 phr of silica-SO 3 H (phr = g of silica-SO 3 H/100 g of sPPEK in membranes) exhibits low methanol crossover, high bound-water content, and a proton conductivity of 3.6 fold increase to that of the pristine sPPEK membrane.

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Preparation of aromatic polyamide membrane for alcohol dehydration by pervaporation

Cited by 15 publications

References 15 publications

Transport of Components in the Separation of Ethanol from Aqueous Dilute Solutions by Forward Osmosis

Transport of Components in the Separation of Ethanol from Aqueous Dilute Solutions by Forward Osmosis

Increases in the proton conductivity and selectivity of proton exchange membranes for direct methanol fuel cells by formation of nanocomposites having proton conducting channels

Proton exchange membranes modified with sulfonated silica nanoparticles for direct methanol fuel cells☆

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