Preparation of a γ-alumina nanofiltration membrane

Larbot, A.; Alami-Younssi, S.; Persin, M.; Sarrazin, J.; Cot, L.

doi:10.1016/0376-7388(94)00159-v

Cited by 100 publications

(28 citation statements)

References 5 publications

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“…It is worth noting that even the (202) family plan, with a reported relative intensity of 5% is clearly visible in Figure 1, demonstrating therefore the high crystallinity of the obtained We characterized also the porous structure of this ZrO 2 powder after thermal treatment by N 2 adsorption-desorption (Figure 2). Both the porous volume (Vp=0.09 cm ) are small, compared to alumina or zirconia coatings previously prepared following a similar procedure [23,32]. We demonstrate in the following how this limited porous volume enhances performances in gas permeation.…”

Section: Validation Of Membrane N°1mentioning

confidence: 67%

“…The preparation of the 5 nm alumina layer was derived from a method previously developed in our group [23]. The ceramic sol was made by peptisation of a Plural SB solution by nitric acid and then the addition of polyvinyl alcohol (PVA) to enhance viscosity.…”

Section: Membrane N°2mentioning

confidence: 99%

“…Pure water and PEG solutions permeations were performed using a home-made tangential filtration pilot using a 15 cm long membrane [23]. As the driving force of the system is a pressure difference across the membrane, a nitrogen pressure (5 and 10 bar) was applied to the liquid circulating inside the membrane (1L of solution in the feed tank).…”

Section: Membrane Testsmentioning

confidence: 99%

“…For example, Larbot et al successfully prepared γ-alumina NF membranes using a sol-gel approach, with a MWCO of 375 Da (pore size of 1 nm), corresponding to 95% rejection of polyethylene glycol (375 Da) solutions. These NF membranes were successfully tested for mineral salts separation using Donnan exclusion [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Turning Commercial Ceramic Membranes into a First Stage of Membranes for Post-Combustion CO2 Separation

Cerneaux¹,

Germain²,

Francisco³

et al. 2015

J Membra Sci Technol

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it has been reported that membranes used to be discarded in the early stage of these evaluations, as being considered as inappropriate [14]. However, with the development of both theoretical and experimental works, the solutions provided by membranes have been highlighted, and they happen now to be promising candidates for post-combustion CO 2 capture if some problems are correctly addressed and solved by involving both material science and system design engineering [2,3,[14][15][16]. The challenges listed by these reports are the following: (i) membranes must display high selectivity toward CO 2 -at least 50-, (ii) it would be suitable to overcome the low CO 2 concentration in the feed flow (~ 12%), (iii) the large amount of gaseous or aerosol water (25%) present in flue gas would foul the membranes stages if not removed or drastically reduced beforehand, (iv) the low pressure of the feed gas (~ 1 bar) reduces the CO 2 recovery, which is a major drawback for low permeance membranes, and (v) the raw flue gas, even after the gas cleaning and desulfurization through the FGD stage, still contain corrosive components that will destroy polymer membranes if directly exposed. AbstractThis report describes how commercial tubular ceramic membranes, initially designed for liquid filtration, can be modified to provide the core separation components of a first stage of flue gas treatment and enrichment in post-combustion CO 2 separation. Commercially available tubular NanoFiltration (NF) ceramic membranes were turned into a membrane for CO 2 separation by a two-step process including additional ceramic coating and chemical grafting. The combination of ceramic coating and chemical grafting drastically modify the membrane properties and turn the membrane initially designed for liquid filtration into a membrane that displays CO 2 vs N 2 selectivity at the opposite of Knudsen-based selectivity, with a CO 2 :N 2 ideal selectivity of 2.3. A second step of this study addressed the reduction of membrane cost, by starting with a low ultrafiltration (UF) 200 nm ceramic support specifically manufactured for this application in place of a NF membrane. After successful coating of a 5 nm and a 1 nm ceramic membranes, this membrane, grafted with a commercial fluorosilane molecule was tested in pure gas permeation of CO 2 and N 2 , with an ideal selectivity CO 2 :N 2 =3. Finally, the same membrane, grafted with glymo, was tested against separation of a CO 2 (20%):N 2 (80%) mixture, and as a function of the permeation stage-cut. A CO 2 :N 2 selectivity of 4 was obtained for a stage-cut of 0.5, and even higher (CO 2 :N 2 selectivity=14) for low stage-cuts usually used for testing dense polymer membranes. These results demonstrate that commercial ceramic porous membranes can be used as starting elements for a first stage of CO 2 post-combustion gas cleaning and CO 2 enrichment.

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Section: Validation Of Membrane N°1mentioning

confidence: 67%

Section: Membrane N°2mentioning

confidence: 99%

Section: Membrane Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Turning Commercial Ceramic Membranes into a First Stage of Membranes for Post-Combustion CO2 Separation

Cerneaux¹,

Germain²,

Francisco³

et al. 2015

J Membra Sci Technol

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“…The use of ceramic membranes in industry has increased, because most chemical and petrochemical processes occur at high temperature * E-mail: taheri@modares.ac.ir in the presence of corrosive gas. Common ceramic membranes are made of silica, titania, zirconia and alumina [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of multilayer mesoporous γ-alumina membrane obtained via sol-gel using new precursors

Tafrishi

Taheri-Nassaj

Sadighzadeh

et al. 2015

Materials Science-Poland

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In this paper, a mesoporous γ-alumina membrane coated on a macroporous α-alumina support via sol-gel method has been reported. A crack-free γ-alumina membrane was obtained by adding PVA to the alumina solution and optimum parameters of roughness, temperature and porosity were achieved. The support was dip-coated in different solutions using two new different solvents with different particle size distributions. Using these two solvents led to the uniform distribution of pore size in the final membrane. The alumina sols showed particle size distributions in the range of 20 to 55 nm which was measured by a DLS Zeta Sizer. X-ray diffraction technique, atomic force microscopy and scanning electron microscopy were used to characterize the membrane layer. XRD and DTA data for the γ-alumina membrane showed its thermal stability up to around 600°C. The thickness of the mesoporous γ-alumina membrane was about 4 µm with 16 nm of surface roughness and 5 nm pore size. The resultant crack-free mesoporous membrane shows that the membrane preparation procedure was optimum. In this work, it has been investigated the performance of γ-alumina membranes for single gas permeation and separation of binary gas mixtures.

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Solvent‐Resistant Nanofiltration Membranes

Hendrix

Vankelecom

2013

Encyclopedia of Membrane Science and Technology

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Solvent‐resistant nanofiltration (SRNF) is a separation technique that allows separations in organic solvents down to a molecular level. It is a growing technology that is environmentally friendly because of its energy‐ and waste‐efficiency. This article comprises a general introduction to SRNF, explaining its basic principles and considerations. Different methods to evaluate SRNF performance are discussed as well as limitations and challenges of the separation method. A more fundamental discussion of the possible transport mechanisms for different types of SRNF membranes is given. Currently used characterization methods, both novel and state of the art, are listed and discussed. An up‐to‐date overview of SRNF membranes types found in recent literature is given, with subdivisions made for each type of material. Their preparation method is also discussed, as well as possible posttreatments. The most extensive part of this subchapter is dedicated to polymeric SRNF membranes, as these are most abundant in literature, but ceramic and mixed matrix membranes are also discussed. Lastly, commercially available SRNF membranes are mentioned.

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Preparation of a γ-alumina nanofiltration membrane

Cited by 100 publications

References 5 publications

Turning Commercial Ceramic Membranes into a First Stage of Membranes for Post-Combustion CO2 Separation

Turning Commercial Ceramic Membranes into a First Stage of Membranes for Post-Combustion CO2 Separation

Preparation and characterization of multilayer mesoporous γ-alumina membrane obtained via sol-gel using new precursors

Solvent‐Resistant Nanofiltration Membranes

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