The Investigation of Organic Binder Effect on Morphological Structure of Ceramic Membrane Support

Boussemghoune, Mohamed; Chikhi, Mustapha; Özay, Yasin; Guler, Pelin; Ünal, Bahar Özbey; Dizge, Nadir

doi:10.3390/sym12050770

Cited by 15 publications

(3 citation statements)

References 30 publications

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“…FTIR spectra of the beneficiated Ethiopia kaolin powder, beneficiated and calcined kaolin (metakaolin) powder, and metakaolin-based flat sheet membrane are shown in Figure 4. According to the result presented in Figure 4(a), beneficiated Ethiopia kaolin powder has OH-bending modes at 1,122 cm À1 and OH-stretching modes at 3,619 and 3,688 cm À1 (Khan et al 2017;Mohtor et al 2017;Boussemghoune et al 2020). Moreover, the absorption band at around 1,626 cm À1 was observed in beneficiated Ethiopia kaolin powder due to its deformation vibration of physisorbed water molecules at the surface (Khan et al 2017;Kljajevićet al 2017;Aragaw & Angerasa 2020).…”

Section: Ftir Measurementsmentioning

confidence: 99%

Flat sheet metakaolin ceramic membrane for water desalination via direct contact membrane distillation

Zewdie

Habtu

Dutta

et al. 2022

Journal of Water Reuse and Desalination

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Hydrophobic metakaolin-based flat sheet membrane was developed via phase inversion and sintering technique and modified through 1H,1H,2H,2H-perfluorooctyltriethoxysilane grafting agents. The prepared membrane was characterized by different techniques such as XRD, FTIR, SEM, contact angle, porosity, and mechanical strength. Their results indicated that the wettability, structural, and mechanical properties of the prepared membrane confirm the suitability of the material for membrane distillation (MD) application. The prepared metakaolin-based flat sheet membrane acquired hydrophobic properties after surface modification with the water contact angle values of 113.2° to 143.3°. Afterward, the membrane performance was tested for different sodium chloride aqueous solutions (synthetic seawater) and various operating parameters (feed temperature, feed flow rate) using direct contact membrane distillation (DCMD). Based on the findings, the prepared membrane at metakaolin loading of 45 wt.% and sintered at 1,300 °C was achieved the best performance with >95% salt rejection and permeate flux of 6.58 ± 0.3 L/m2 · h at feed temperature of 80 °C, feed concentration of 35 g/L, and feed flow rate of 60 L/h. It can be concluded that further optimization of membrane porosity, mechanical, and surface properties is required to maximize the permeate flux and salt rejection.

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Section: Ftir Measurementsmentioning

confidence: 99%

Flat sheet metakaolin ceramic membrane for water desalination via direct contact membrane distillation

Zewdie

Habtu

Dutta

et al. 2022

Journal of Water Reuse and Desalination

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“…The shaping processes of MOFs into monoliths, granules, or pellets usually utilize polymer-type adhesive agents, as this type of binder is easily mixed with MOFs, inducing non-covalent bonding (i.e., hydrogen bonding); in addition, they are soluble to volatile agents [44]. In general, organic binders are synthesized by polymers with a chain-like structure of various lengths, where polar groups exist [45]. The most widely used polymer-type binders in MOF shaping processes is polyvinyl alcohol (PVA) and polyvinyl butyral (PVB).…”

Section: Processes With Organic Bindersmentioning

confidence: 99%

Binding Materials for MOF Monolith Shaping Processes: A Review towards Real Life Application

et al. 2022

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Metal–organic frameworks (MOFs) could be utilized for a wide range of applications such as sorption, catalysis, chromatography, energy storage, sensors, drug delivery, and nonlinear optics. However, to date, there are very few examples of MOFs exploited on a commercial scale. Nevertheless, progress in MOF-related research is currently paving the way to new industrial opportunities, fostering applications and processes interconnecting fundamental chemistry with engineering and relevant sectors. Yet, the fabrication of porous MOF materials within resistant structures is a key challenge impeding their wide commercial use for processes such as adsorptive separation. In fact, the integration of nano-scale MOF crystallic structures into bulk components that can maintain the desired characteristics, i.e., size, shape, and mechanical stability, is a prerequisite for their wide practical use in many applications. At the same time, it requires sophisticated shaping techniques that can structure nano/micro-crystalline fine powders of MOFs into diverse types of macroscopic bodies such as monoliths. Under this framework, this review aims to bridge the gap between research advances and industrial necessities for fostering MOF applications into real life. Therefore, it critically explores recent advances in the shaping and production of MOF macro structures with regard to the binding materials that have received little attention to date, but have the potential to give new perspectives in the industrial applicability of MOFs. Moreover, it proposes future paths that can be adopted from both academy and industry and can further boost MOF exploitation.

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“…Meanwhile, the formed sulfur after optimization enhanced the hydrophobicity of coal pyrite [8]. Therefore, it is very important to accurately obtain the crystal structure information of kaolinite for understanding the physical and chemical properties and flotation characteristics of kaolinite [9]. Coal kaolinite has formed special crystal structures in the long-term coal forming environment due to the lattice defect and surrounding rock symbiosis and has further significantly exhibited different surface properties from the non-coal kaolinite.…”

Section: Introductionmentioning

confidence: 99%

Study on the Crystal Structure of Coal Kaolinite and Non-Coal Kaolinite: Insights from Experiments and DFT Simulations

Peng

Liu

2020

Symmetry

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Coal is often coated by kaolinite in flotation, leading to a decrease in the quality of clean coal. The structure of the mineral determines its properties and flotation behavior. Therefore, to remove the kaolinite from coal efficiently, the difference in mineralogical characteristics between non-coal and coal kaolinite were analyzed using advanced instruments. The experiment results showed that, due to the substitution of the C atom for Si atom, the interplanar spacing of the kaolinite (001) surface became small with C-O-C, Al-O-C, and C-O-Si covalent bonds formed instead of Al-O-Si and Si-O-Si bond. Based on this, the models of monolayer and bilayer coal kaolinite (001) surfaces were built and the structure difference was compared through DFT calculation. The calculation results showed that the silicon atom of the kaolinite Si-O-(001) surface was easier to be doped by carbon atoms with external energy as the interplanar spacing of the kaolinite (001) surface decreased with the increase in doped carbon atoms (7.15440 Å→7.11859 Å→7.10902 Å→7.10105 Å). The structural difference between non-coal kaolinite and coal kaolinite were compared from the view of the experiment and quantum chemistry, which provides an important theory for subsequent research on the properties of coal kaolinite and its further processing and utilization.

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The Investigation of Organic Binder Effect on Morphological Structure of Ceramic Membrane Support

Cited by 15 publications

References 30 publications

Flat sheet metakaolin ceramic membrane for water desalination via direct contact membrane distillation

Flat sheet metakaolin ceramic membrane for water desalination via direct contact membrane distillation

Binding Materials for MOF Monolith Shaping Processes: A Review towards Real Life Application

Study on the Crystal Structure of Coal Kaolinite and Non-Coal Kaolinite: Insights from Experiments and DFT Simulations

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