A low-cost alumina-mullite composite hollow fiber ceramic membrane fabricated via phase-inversion and sintering method

Li, Lingling; Chen, Ming-Liang; Dong, Yong; Dong, Xinfa; Cerneaux, Sophie; Hampshire, Stuart; Cao, Jingjie; Zhu, Li; Zhu, Zhiwen; Liu, Jing

doi:10.1016/j.jeurceramsoc.2016.02.020

Cited by 119 publications

(64 citation statements)

References 29 publications

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“…Furthermore, due to the advantages offered such as high stability and efficiency, ease operation, low operating cost and capital, low energy consumption and also low pollution, it is known as one of the major technologies for sustainable environmental pollution control engineering. Fundamentally, separation performance of a membrane is mainly limited by its structure and property [8,9]. As far as membrane materials are concerned, both organic polymeric and inorganic membranes have received increasing attentions for water treatment at both laboratory and industrial scales.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

et al. 2017

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Membrane separation technology is widely explored for various applications, such as water desalination and wastewater treatment, which can alleviate the global issue of fresh water scarcity. Specifically, carbon nanotubes (CNTs)-based composite membranes are increasingly of interest due to the combined merits of CNTs and membrane separation, offering enhanced membrane properties. This article first briefly discusses fabrication and growth mechanisms, characterization and functionalization techniques of CNTs, and then reviews the fabrication methods for CNTs-based composite membranes in detail. The applications of CNTs-based composite membranes in water treatment are comprehensively reviewed, including seawater or brine desalination, oil-water separation, removal of heavy metal ions and emerging pollutants as well as membrane separation coupled with assistant techniques. Furthermore, the future direction and perspective for CNTs-based composite membranes are also briefly outlined.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

et al. 2017

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“…A titration technique was used to quantitatively measure the number of active hydroxyl sites. As shown in Figure , the number of active SOH on the HFs linearly increased with the addition of silica to the spinning slurry or increase in the mullite phase amount in the HFs.…”

Section: Resultsmentioning

confidence: 99%

“…A potentiometric titration was applied to determine the number of active surface hydroxyl sites on the hollow fibers (HFs) according to the literature using a Leici automatic potentiometric titration instrument (ZDJ‐4A). The HFs (1.0 g) were mixed with 100 mL of a 0.1 M sodium chloride solution under vigorous stirring.…”

Section: Methodsmentioning

confidence: 99%

Preparation of high‐performance zeolite NaA membranes in clear solution by adding SiO₂ into Al₂O₃ hollow‐fiber precursor

Ma¹,

Wang²,

et al. 2018

AIChE Journal

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Zeolite NaA membranes were prepared in a clear synthesis solution without the aid of nanoseeds. To improve the properties of the membranes formed in a clear solution, alumina hollow fibers were fabricated by adding silica powder to the conventional spinning slurry, resulting in hollow fibers with a mullite phase. Prior to the membrane synthesis, the hollow fibers were pretreated by dipping in an aged synthesis solution diluted with isopropanol. Dense zeolite NaA membranes on mullite‐containing alumina hollow fibers were successfully obtained at 100°C for 2 h without the aid of nanoseeds. The membranes have a good pervaporation performance with a high flux of 10.8 kg m−2 h−1 and a separation factor of over 10,000. The abundant mullite‐phase hydroxyl groups on the support surface promote the nucleation and growth of zeolite crystals on the support, resulting in dense membranes. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2679–2688, 2018

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“…Bauxite is the raw material of alumina production, and the calcined bauxite mainly composed of corundum with little mullite phase shows the basic characteristics of pure alumina. The price and sintering temperature of calcined bauxite are far lower than that of pure alumina, which essentially determine the ceramic tubes based on calcined bauxite are low‐cost . Therefore, in this work the commercial calcined bauxite powers are used as a raw material for the low‐cost porous ceramic tube.…”

Section: Introductionmentioning

confidence: 99%

“…The price and sintering temperature of calcined bauxite are far lower than that of pure alumina, which essentially determine the ceramic tubes based on calcined bauxite are low-cost. 17,19,20 Therefore, in this work the commercial calcined bauxite powers are used as a raw material for the low-cost porous ceramic tube.…”

Section: Introductionmentioning

confidence: 99%

Cost‐effective porous ceramic tubes fabricated through a phase inversion/casting process using calcined bauxite

Zhu

Cao

Xudong

et al. 2018

Int J Applied Ceramic Tech

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Cost‐effective ceramic tubes based on low‐price commercial calcined bauxite for economical separation were fabricated by a new phase‐inversion casting method. The thermal shrinkage and weight loss during heating of the green tubes were characterized by dilatometric analysis and TG, respectively. Three shrinkage stages appear successively, corresponding to the viscous deformation of polymeric binder at 200‐300°C, significant combustion loss of ~5.2 wt% at 500‐620°C and sintering shrinkage over 800°C, respectively. However, due to high enough viscosity of the casting suspension that can guarantee the green tube against collapse or deformation during the phase inversion/casting process, the sintered tubes display nearly uniform microstructure instead of characteristic asymmetrical structure of the phase inversion process. The influence of sintering temperature on the pore property (including pore size and porosity) and mechanical strength was investigated. As the sintering temperature increases from 1200 to 1400°C, the porosity and average pore size decrease from 46.4% to 37.0% and from 0.98 to 0.81 μm, respectively, and the flexural strength increases from 25.8 to 65.1 MPa. The cost‐effective ceramic tube sintering at the range of 1250‐1400°C can be capable of functioning as a microfiltration membrane or an ultrafiltration membrane support.

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A low-cost alumina-mullite composite hollow fiber ceramic membrane fabricated via phase-inversion and sintering method

Cited by 119 publications

References 29 publications

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

Preparation of high‐performance zeolite NaA membranes in clear solution by adding SiO₂ into Al₂O₃ hollow‐fiber precursor

Cost‐effective porous ceramic tubes fabricated through a phase inversion/casting process using calcined bauxite

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A low-cost alumina-mullite composite hollow fiber ceramic membrane fabricated via phase-inversion and sintering method

Cited by 119 publications

References 29 publications

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

Fabrication and Water Treatment Application of Carbon Nanotubes (CNTs)-Based Composite Membranes: A Review

Preparation of high‐performance zeolite NaA membranes in clear solution by adding SiO2 into Al2O3 hollow‐fiber precursor

Cost‐effective porous ceramic tubes fabricated through a phase inversion/casting process using calcined bauxite

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Preparation of high‐performance zeolite NaA membranes in clear solution by adding SiO₂ into Al₂O₃ hollow‐fiber precursor