Effect of different heat treatments on oxidation-bonded SiC membrane for water filtration

Bukhari, Syed Zaighum Abbas; Ha, Jang‐Hoon; Lee, Jongman; Song, In‐Hyuck

doi:10.1016/j.ceramint.2018.05.029

Cited by 24 publications

(11 citation statements)

References 30 publications

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“…In the literature, there are several reports showing the corrosion resistance of SiC membranes [ 22 , 27 , 29 , 32 , 46 , 47 ]. For example, Jiang et al [ 32 ] prepared SiC ceramic membrane using zeolite residue as sintering additive and exposed them to solutions of 20 vol% H 2 SO 4 or 1 wt% NaOH at 90 °C over 300 h, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…When these membranes were applied for water treatment purposes, they showed low water permeability, which is around 0.06 L m −2 h −1 bar −1 , due to the dense structure [ 19 ]. On the other hand, SiC membranes developed by deposition of colloidal suspensions method result in porous membrane structure, which generally is more suitable for water and wastewater treatment applications [ 20 , 21 , 22 ]. Deposition of colloidal suspension is also called ceramic processing.…”

Section: Introductionmentioning

confidence: 99%

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Ceramic Processing of Silicon Carbide Membranes with the Aid of Aluminum Nitrate Nonahydrate: Preparation, Characterization, and Performance

2021

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The development of a low-cost and environmentally-friendly procedure for the fabrication of silicon carbide (SiC) membranes while achieving good membrane performance is an important goal, but still a big challenge. To address this challenge, herein, a colloidal coating suspension of sub-micron SiC powders was prepared in aqueous media by employing aluminum nitrate nonahydrate as a sintering additive and was used for the deposition of a novel SiC membrane layer onto a SiC tubular support by dip-coating. The sintering temperature influence on the structural morphology was studied. Adding aluminum nitrate nonahydrate reduced the sintering temperature of the as-prepared membrane compared to conventional SiC membrane synthesis. Surface morphology, pore size distribution, crystalline structure, and chemical and mechanical stability of the membrane were characterized. The membrane showed excellent corrosion resistance in acidic and basic medium for 30 days with no significant changes in membrane properties. The pure water permeance of the membrane was measured as 2252 L h−1 m−2 bar−1. Lastly, the final membrane with 0.35 µm mean pore size showed high removal of oil droplets (99.7%) in emulsified oil-in-water with outstanding permeability. Hence, the new SiC membrane is promising for several industrial applications in the field of wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ceramic Processing of Silicon Carbide Membranes with the Aid of Aluminum Nitrate Nonahydrate: Preparation, Characterization, and Performance

2021

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“…Das et al [37] reported that SiC was stable in the pH range of 3-10 at 90 � C for 10 days, though unstable at pH 1 due to formation of surface siloxane groups (Si-O-Si), whilst SiC dissolved rapidly with the formation of Na2SiO3NaOH when exposed to NaOH (pH 11). Bukhari et al [45] also found that SiC samples slightly degraded when exposed to acids solutions for up to 60 days at room temperature. Han et al [33] doped SiC substrates CaO and ZrO2 and exposed them to solutions of 20 wt% H2SO4, 0.5 wt% HF and 1 wt% NaOH, respectively, at 80 � C for 96 h. The mass loss was less than 1% for all tests, suggesting that metal oxide SiC samples were stable during these short time tests of approximately 4 days.…”

Section: Thermal and Chemical Stabilitymentioning

confidence: 94%

Silicon carbide filters and porous membranes: A review of processing, properties, performance and application

Hotza

Luccio

Wilhelm

et al. 2020

Journal of Membrane Science

116

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Silicon carbide (SiC) filters and porous membranes is a growing industry with deployment for gas and liquid separation processes. In view of its importance, the research efforts into the development of SiC filters and membranes are of growing interest around the world. Therefore, this review paper is focused on the latest advancements in SiC and SiC composites used for the preparation of substrates and thin films in filters and membranes. There is a multitude of methods used to prepare filters and membranes of different shapes (tubular, honeycomb, flat sheets and multi-channel), which are influenced by precursor mixture and sintering conditions. In turn, these processing conditions affect porosity and pore size, which affects the transport and separation properties of SiC filters and membranes. SiC particles size and distribution allow for the precise control of pore size in membranes, leading to high gas separation factors. In addition, SiC has strong thermal stability properties that are very desirable for high temperature gas cleaning. Together with gas and liquid transport and separation properties, this review also addresses the potential applications in gas and liquid separation processes, coupled with thermal/chemical stability properties. Future challenges are highlighted towards further research efforts.

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“…In our previous studies [32,33], we investigated the application of oxidation-bonded SiC ceramics as a membrane-coating material for the first time and observed that a controlled oxidation behavior is critical for the fabrication of a filtration layer. In that study, we used a clay-bonded SiC support.…”

Section: Introductionmentioning

confidence: 99%

“…Because large SiC particles (which have low sinterability) lead to high permeability and low strength, while fine-sized SiC particles (which have high sinterability) lead to high strength and low permeability, we proposed the use of powder mixtures, which could help overcome the issues of low strength and low permeability. Moreover, our previous study [32,33] demonstrated that the oxidation of SiC is accompanied by volume expansion, which can be problematic in fabricating the support. Therefore, in this study, a combination of SiC particles of different sizes was used to prepare a porous SiC ceramic support without volume expansion.…”

Section: Introductionmentioning

confidence: 99%

Expansionless oxidation-bonded SiC microfiltration membrane by controlling the oxidation of SiC particle mixtures

Bukhari

Lee

et al. 2021

Journal of Asian Ceramic Societies

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Oxidation bonding is a technique used to produce porous SiC ceramics at low temperatures. The oxidation behavior of SiC particles depends on various factors, including the oxidation environment, temperature, time, particle size, and impurities. The key properties required for a porous ceramic membrane are a controlled pore morphology, high strength, and high permeability. In this study, SiC powders with different particle sizes (0.55 and 7 μm) were used to fabricate porous ceramic membranes. First, the oxidation behavior of the SiC powders was evaluated. Then, the feasibility of using their mixture to create supports for microfiltration applications was analyzed. Through this study, not only were the ideal conditions for fabricating microfiltration supports quantified but also the conditions where specimens could be made with zero size change. Finally, a membrane fabricated from a powder mixture composed of 92% of the 7 μm powder and 8% of the 0.55 μm powder and sintered at 1450°C was proposed, which had a 37% porosity, 1.42 μm pore size, 49.6 MPa flexural strength, and L cm -2 min -1 bar -1 air permeability.

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Effect of different heat treatments on oxidation-bonded SiC membrane for water filtration

Cited by 24 publications

References 30 publications

Ceramic Processing of Silicon Carbide Membranes with the Aid of Aluminum Nitrate Nonahydrate: Preparation, Characterization, and Performance

Ceramic Processing of Silicon Carbide Membranes with the Aid of Aluminum Nitrate Nonahydrate: Preparation, Characterization, and Performance

Silicon carbide filters and porous membranes: A review of processing, properties, performance and application

Expansionless oxidation-bonded SiC microfiltration membrane by controlling the oxidation of SiC particle mixtures

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