Fabrication of silicon carbide membranes on highly permeable supports

Dabir, Sasan; Deng, Wangxue; Sahimi, Muhammad; Tsotsis, Theodore T.

doi:10.1016/j.memsci.2017.05.038

Cited by 34 publications

(25 citation statements)

References 43 publications

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“…[36] and are also listed in Table 2. It can be seen that the obtained composite exhibits a lower He permeation value, as compared to Dabir et al [47], supporting the result that the obtained composites are dense and without through holes, which is consist with the lower porosity obtained by Archimedes method and low pore volume via mercury intrusion porosimetry ( Table 2).…”

Section: Resultssupporting

confidence: 85%

High temperature mechanical retention characteristics and oxidation behaviors of the MoSi2(Cr5Si3)—RSiC composites prepared via a PIP—AAMI combined process

et al. 2019

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In the present paper, MoSi 2 (Cr 5 Si 3)-RSiC composites were prepared via a combination of precursor impregnation pyrolysis (PIP) and MoSi 2 −Si−Cr alloy active melt infiltration (AAMI) process. Composition, microstructure, mechanical retention characteristics, and oxidation behaviors of the composites at elevated temperature were studied. X-ray diffraction (XRD) pattern confirms that the composites mainly compose of 6H-SiC, hexagonal MoSi 2 , and tetragonal Cr 5 Si 3. Scanning electron microscopy (SEM) image reveals that nearly dense MoSi 2 (Cr 5 Si 3)-RSiC composites exhibiting three-dimensionally (3D) interpenetrated network structure are obtained when infiltrated at 2173 K, and the interface combination of the composites mainly depends on the composition ratio of infiltrated phases. Oxidation weight gain rate of the composites is much lower than that of RSiC matrix, where MoSiCr2 possesses the lowest value of 0.1630 mg⋅cm −2 , about 78% lower than that of RSiC after oxidation at 1773 K for 100 h. Also, it possesses the highest mechanical values of 139.54 MPa (flexural strength σ f and RT) and 276.77 GPa (elastic modulus E f and RT), improvement of 73.73% and 29.77% as compared with that of RSiC, respectively. Mechanical properties of the composites increase first and then decrease with the extension of oxidation time at 1773 K, due to the cooperation effect of surface defect reduction via oxidation reaction and thermal stress relaxation in the composites, crystal growth, and thickness increase of the oxide film. Fracture toughness of MoSiCr2 reaches 2.24 MPa•m 1/2 (1673 K), showing the highest improvement of 31.70% as compared to the RT value.

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Section: Resultssupporting

confidence: 85%

High temperature mechanical retention characteristics and oxidation behaviors of the MoSi2(Cr5Si3)—RSiC composites prepared via a PIP—AAMI combined process

et al. 2019

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“…Organic/inorganic membrane separation technology has emerged as a promising alternative for industrial wastewater treatment, particularly for the treatment of PW [15,16]. The advantages of membrane filtration include low energy consumption, a small footprint, no requirement for additional chemicals during the treatment process, and consistent effluent quality [17]. Furthermore, inorganic (ceramic) membranes have remarkable thermal and physiochemical stability under harsh process and feed conditions, such as extreme pH, temperature and pressure, and the presence of organic solvents [18,19].…”

Section: Ceramic Membrane Technology For Pw Treatmentmentioning

confidence: 99%

“…SiC membranes have received little attention compared to metal oxides, especially for the treatment of PW [26][27][28]. SiC membranes are characterized by a strongly hydrophilic surface, high porosity, and a rather uniform pore size distribution [16,17]. The surface characteristics of the membrane material such as isoelectric point, surface charge density, and hydrophobicity are among the factors that may influence membrane performance.…”

Section: Ceramic Membrane Technology For Pw Treatmentmentioning

confidence: 99%

Innovative Optical-Sensing Technology for the Online Fouling Characterization of Silicon Carbide Membranes during the Treatment of Oily Water

Ebrahimi

Schmidt²,

Kaplan

et al. 2020

Sensors

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The oil and gas industry generates a large volume of contaminated water (produced water) which must be processed to recover oil before discharge. Here, we evaluated the performance and fouling behavior of commercial ceramic silicon carbide membranes in the treatment of oily wastewaters. In this context, microfiltration and ultrafiltration ceramic membranes were used for the separation of oil during the treatment of tank dewatering produced water and oily model solutions, respectively. We also tested a new online oil-in-water sensor (OMD-32) based on the principle of light scattering for the continuous measurement of oil concentrations in order to optimize the main filtration process parameters that determine membrane performance: the transmembrane pressure and cross-flow velocity. Using the OMD-32 sensor, the oil content of the feed, concentrate and permeate streams was measured continuously and fell within the range 0.0–200 parts per million (ppm) with a resolution of 1.0 ppm. The ceramic membranes achieved an oil-recovery efficiency of up to 98% with less than 1.0 ppm residual oil in the permeate stream, meeting environmental regulations for discharge in most areas.

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“…Recently, Dabirs and co-workers synthesized asymmetric porous SiC tube [18]. However, the controlling of SiC membrane structure using polystyrene was not easy.…”

Section: Of 10mentioning

confidence: 99%

Gas permeation Property of Silicon Carbide Membrane Synthesized by Counter Diffusion Chemical Vapor Deposition

Nagano¹,

Sato²,

Kikuchi³

2019

Preprint

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An amorphous silicon carbide (SiC) membrane with H2 permeance of 1.2E-7 mol･m-2･s-1･Pa-1 and excellent H2/CO2 selectivity of 2600 at 673 K was successfully synthesized on a Ni-gamma-alumina-coated alpha-alumina porous support by counter diffusion chemical vapor deposition (CDCVD) using silacycrobutane (SCB) at 788 K. The dominant permeation mechanism for He and H2 in the temperature range 323-673 K was activated diffusion. The SiC active layer was formed in Ni-gamma-Al2O3 intermediate layer. The thermal expansion coefficients mismatch between SiC active layer and Ni-gamma-Al2O3-coated alpha-Al2O3 porous support was eased by the low decomposition temperature of SiC source and membrane structure.

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Fabrication of silicon carbide membranes on highly permeable supports

Cited by 34 publications

References 43 publications

High temperature mechanical retention characteristics and oxidation behaviors of the MoSi2(Cr5Si3)—RSiC composites prepared via a PIP—AAMI combined process

High temperature mechanical retention characteristics and oxidation behaviors of the MoSi2(Cr5Si3)—RSiC composites prepared via a PIP—AAMI combined process

Innovative Optical-Sensing Technology for the Online Fouling Characterization of Silicon Carbide Membranes during the Treatment of Oily Water

Gas permeation Property of Silicon Carbide Membrane Synthesized by Counter Diffusion Chemical Vapor Deposition

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