New clay–alumina porous capillary supports for filtration application

Sarkar, S.; Bandyopadhyay, Sibdas; Larbot, A.; Cerneaux, Sophie

doi:10.1016/j.memsci.2011.12.010

Cited by 101 publications

(46 citation statements)

References 21 publications

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“…Consequently, this flexural strength value is extremely higher than that reported by other works carried out on similar based ceramics [29,[57][58][59][60][61]. This value (203 MPa) is also significantly higher than those reported in [57] (40 MPa) and [60] (36 MPa) for their prepared membrane supports (application of anorthite), although they have been sintered at relatively higher temperatures (≥1450 °C). This result clearly shows the importance of the obtained value of flexural strength.…”

Section: Resultsmentioning

confidence: 51%

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

et al. 2017

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Anorthite is widely spread in nature and belongs to the plagioclase group of rock forming minerals. Plagioclases represent a continuous series of solid solutions between anorthite (CaO.Al 2 O 3 .2SiO 2 ) and albite (Na 2 O.Al 2 O 3 .6SiO 2 ) and form an enormous group of triclinic minerals. harabi52@gmail.com, Zaiou_21@yahoo.fr, guechia@yahoo.fr, semouni84@gmail.com, kanour17@yahoo.fr, foughali_lazhar@yahoo.fr, zouaisouheila@yahoo.fr, mezahif@yahoo.fr, guerfatiha@gmail.com Mineralogically, anorthite is reported as a chemically weak mineral, resulting in a basic reaction when dissolved into boiling water, while strong acidic and basic solutions dissolve it. Glass-ceramics and ceramics with crystalline anorthite are mainly used in electrical, thermo-mechanical and water resistance applications [1][2][3][4]. Anorthite is an important technical ceramic material that has good physical properties, such as very low thermal expansion coefficient, low dielectric constant and loss, good thermal shock resistance, and high creep resistance at high AbstractGood quality ceramics costs a lot that has limited their use in developing countries. This work was devoted to prepare low-cost and good quality anorthite based ceramics. The proposed composition was 80 wt% kaolin (DD2 type) and 20 wt% calcium oxide (CaO). The choice of these raw materials was dictated by their natural abundance coupled with a modified milling system, as another interesting advantage. Previous studies have shown that a simple vibratory multidirectional milling system using bimodal distribution of highly resistant ceramic milling elements has been successfully applied for obtaining fine powders. The influence of the relatively lower sintering temperature, ranging from 800 to 1100 °C, on the porosity and the average pore size (APS) have been investigated. The APS and the porosity values of samples sintered at 950 °C were about 1 μm and 4%, respectively. The best Vickers microhardness and 3-point bending strength values for these sintered samples, using this proposed milling system, were 7.1 GPa and 203 MPa, respectively. Finally, the crystalline phase evolution during heat treatment was investigated by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy techniques.

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Section: Resultsmentioning

confidence: 51%

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

et al. 2017

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“…The quality of the ceramic membrane may be much better than other membrane material, especially polymers, owing to its superior chemical and thermal stability and ability to withstand harsh operating conditions (temperature and chemicals) [1]. For many years, an enormous number of studies have been conducted on hollow fibre membranes due to their exceptionally high packing density compared to other geometrical shapes, such as flat sheet and tubular.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of affordable hydrophobic ceramic hollow fibre membrane for contacting processes

et al. 2017

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Affordable hydrophobic hollow fibre membranes were prepared using kaolin and alumina based ceramic powders via a combined phase inversion and sintering technique, followed by a grafting with fluoroalkylsilane (FAS). The crux of the matter in this paper is to study the changes in the properties of the hollow fibre membranes (gas permeation, mechanical strength, pore size, porosity, tortuosity, morphology, and contact angle) by the addition of alumina (Al 2 O 3 ) to the pure kaolin with mono or multiparticle sizes. By varying the overall loading and particle size of alumina addition, different morphologies of the membranes were obtained due to the differences in the path lengths during phase inversion process for each solvent and nonsolvent exchange. The successful grafting with FAS was evidenced by the increase in contact angle from nearly equal to zero degree before grafting to 140° after grafting. Kaolin-alumina-4, one of the hollow fibres fabricated in this work, achieved a mean pore size of 0.25 µm with the bending strength of 96.4 MPa and high nitrogen permeance of 2.3×10 5 mol·m 2 ·Pa 1 ·s 1 , which makes the hollow fibre most suitable for the membrane contactor application.

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“…In this work, novel microfiltration (MF) ceramic composite membranes, made of thinner active layer supported on a porous support, have been prepared. Inorganic membranes are gaining a lot of interest in the recent years, thanks to the development of new types of inorganic membranes [28][29][30][31][32][33][34][35][36][37]. The inorganic membranes have excellent high thermal, chemical stability, mechanical resistance [8,13,[38][39][40][41][42][43], a longer life-time, ease of cleaning, a low thermal conductivity and a low dielectric constant [43,44].…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of tubular composite ceramic membranes using natural alumino-silicates for microfiltration applications

Ghouil

Harabi

Bouzerara

et al. 2015

Materials Characterization

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The preparation and characterization of porous tubular ceramic composite microfiltration membranes, using kaolins and calcium carbonates, were reported. The porous gehlenite (2CaO·Al 2 O 3 ·SiO 2 ) and anorthite (CaO·Al 2 O 3 ·2SiO 2 ) based ceramics were obtained by a solid state reaction. A ceramic support, sintered at 1250°C, within an average pore size of about 8 μm, a porosity of about 47% and a compression strength around 40 MPa, was prepared. The microfiltration active top layer was added on the support by a slip casting from clay powder suspensions. The novel microfiltration membrane layer has a thickness of 40 μm and an APS value of about 0.2 μm. This average pore size value was improved and considerably lower than those reported in the literature (0.5 μm). The performance of the novel microfiltration ceramic membrane was determined for evaluating both the water permeability and rejection. This proved the potentiality of the membrane produced in the microfiltration field. Moreover, the good adhesion, between the support and the active microfiltration layer membranes, was also proved. A correlation between microstructures of used powders and physicochemical properties was discussed. Finally, the origin of the unique two powder order membrane depositions was also proposed.

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New clay–alumina porous capillary supports for filtration application

Cited by 101 publications

References 21 publications

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

Fabrication and characterization of affordable hydrophobic ceramic hollow fibre membrane for contacting processes

Development and characterization of tubular composite ceramic membranes using natural alumino-silicates for microfiltration applications

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