Fabrication of robust SiC ceramic membrane filter with optimized flap for industrial coal-fired flue gas filtration

Wei, Wei; Han, Yaru; Han, Feng; Zou, Dong; Zhang, Feng; Zhong, Zhaoxiang; Xing, Weihong

doi:10.1016/j.seppur.2022.122075

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…The use of ceramic membranes in industrial filtration typically requires high‐pressure air back‐flushing to remove deposited dust layers 37–39 . However, this can expose the ceramic membrane to thermal shock, resulting in cracks on the surface of ceramic membrane.…”

Section: Resultsmentioning

confidence: 99%

“…The use of ceramic membranes in industrial filtration typically requires high-pressure air back-flushing to remove deposited dust layers. [37][38][39] However, this can expose the ceramic membrane to thermal shock, resulting in cracks on the surface of ceramic membrane. To investigate the thermal shock resistance of the TCS support, which largely determines the structural properties of the ceramic membrane, its radial crushing strength was measured (Figure 2A).…”

Section: Thermal Shock and Acid Corrosion Resistance Of Tcs Supportmentioning

confidence: 99%

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Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM₂_.5, NO, and toluene

Chen,

Yin,

Tan

et al. 2023

AIChE Journal

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SiC catalytic membranes exhibit remarkable promise in controlling of dust and atmospheric pollutant emissions. However, their fabrication is limited to small‐scale production, with dimensions up to a disc of 30 mm in diameter. Scaling up the fabrication to tubular SiC catalytic membranes without compromising their application performance remains a challenge due to uncontrollable structural defects during processing. Herein, a tubular Co‐SiC (TCS) catalytic membrane was fabricated through a combination of cold‐isostatic‐pressure molding, spin spray‐coating and acid‐treating processes. The TCS catalytic membrane shows high filtration efficiencies toward industrial‐PM2.5 concentrations. A competitive reaction between NO and toluene was observed on TCS catalytic membrane, and the toluene oxidation is prioritized at low temperatures. In a 52 h stability test, the TCS catalytic membrane achieved PM2.5, NO, and toluene removal efficiencies of 98.92%, 70%, and 100%, respectively. This study lays the foundation for the practical implementation of SiC catalytic membranes in industrial emissions treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Thermal Shock and Acid Corrosion Resistance Of Tcs Supportmentioning

confidence: 99%

Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM₂_.5, NO, and toluene

Chen,

Yin,

Tan

et al. 2023

AIChE Journal

Self Cite

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“…Unfortunately, this usually accompanies with the notable sacrifice in porosity [22]. For example, Wei et al [23] introduced fine SiC powders (d50 = 25 µm) into coarse SiC aggregates (d50 = 200 µm) to fabricate supports and the porosity of sintered ones decreased from 35% to 26% with the content of fine powders increasing from 5 to 40 wt%. Since high porosity is also the key target for porous ceramics, the well-adopted particle grading strategy is thus not the best pathway to prepare porous ceramics.…”

Section: Introductionmentioning

confidence: 99%

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

Liang,

Zhang,

et al. 2024

Journal of Advanced Ceramics

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Porous ceramics usually requires high mechanical strength and maximized porosity simultaneously, while for conventional particle grading strategy it is highly challenging to meet both demands. To this end, a reverse particle grading strategy was developed based on the linear packing J u s t A c c e p t e d 2 model by unusually introducing coarse particles (d50 = 16 μm) into fine particles (d50 = 5 μm) matrix.Followed by the extrusion and sintering process, tubular porous SiC ceramic supports with improved mechanical strength were successfully fabricated. Effects of coarse particles on the rheology properties of the ceramic paste, and macroscopic properties and microstructure of SiC supports were systematically investigated. With the increasing content of coarse SiC particles to 30 wt%, the pressure generated in extrusion decreased from 5.5 ± 0.2 MPa to 1.3 ± 0.1 MPa. Notably, the bending strength of tubular supports increased from 36.6 ± 5.6 MPa to 49.1 ± 4.5 MPa when incorporating 20 wt% of coarse powders. The notable improved mechanical strength was attributed to the distribution of coarse particles that prolonged the route of crack deflection. Also, the optimized tubular supports showed an average pore size of 1.2 ± 0.1 μm and open porosity of 45.1 ± 1.6 % and water permeability of 7163 ± 150 L•m -2 •h -1 •bar -1 and good alkali and acid corrosion resistances. Significantly, the strategy was proved to be feasible in the scale-up fabrication of 19channel SiC tubular porous ceramic supports.

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Size-resolved particulate matter filtration efficiency of macroporous asymmetric SiC ceramic filters

Innocentini,

Kayal,

Dey

et al. 2024

Ceramics International

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Fabrication of robust SiC ceramic membrane filter with optimized flap for industrial coal-fired flue gas filtration

Cited by 14 publications

References 39 publications

Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM₂_.5, NO, and toluene

Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM₂_.5, NO, and toluene

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

Size-resolved particulate matter filtration efficiency of macroporous asymmetric SiC ceramic filters

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Fabrication of robust SiC ceramic membrane filter with optimized flap for industrial coal-fired flue gas filtration

Cited by 14 publications

References 39 publications

Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM2.5, NO, and toluene

Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM2.5, NO, and toluene

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

Size-resolved particulate matter filtration efficiency of macroporous asymmetric SiC ceramic filters

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Product

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Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM₂_.5, NO, and toluene

Preparation of asymmetric tubular Co‐SiC catalytic membrane for synergistic removal of PM₂_.5, NO, and toluene