Environmental effects on microstructure and strength of SiC-based hot gas filters

Pastila, Pirjo; Helanti, Vesa; Nikkilä, A.-P.; Mäntylä, T.

doi:10.1016/s0955-2219(00)00326-5

Cited by 78 publications

(49 citation statements)

References 14 publications

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“…Moreover, it is becoming more important to protect heat exchangers, catalyst units and turbines from corrosion and fouling in a biomass combustion process (Pastila et al 2001;Freitas et al 2006;Heidenreich 2013;Nilsson et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Silicon carbide (SiC) is especially useful for the fabrication of ceramic filters because of its high temperature stability, thermal shock resistance, high corrosion resistance, and excellent mechanical properties (Alvin et al 1991;Alvin 1996;Pastila et al 2001;Li et al 2011). Ceramic filters for hot gas cleaning can be classified into fibrous ceramic filters and granular ceramic filters on the basis of their fabrication materials.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Choi

Kim

et al. 2014

Aerosol Science and Technology

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The silicon carbide (SiC) ceramic filter is the most favorable component to remove particulate matter from hot flue gas due to its high filtration efficiency and high thermal durability. The effect of SiC powder size on the physical properties and filtration performance to prepare high-performance granular ceramic filter media was investigated in this study. Disk-type filter media were prepared by mixing ceramic components followed by physical compression and sintering. The porosity and average pore diameter in the filter media increased with increasing powder size. However, the mechanical strength decreased with increasing powder size, while it increased with increasing physical compressive force. The filter performance factor, q FM was introduced to evaluate the ceramic filter properties, and the SiC50 filter was the best of the ceramic filters prepared in this study. We also found that diffusion was a dominant collection mechanism for particles smaller than 0.7 mm, and direct interception and inertia were dominant collection mechanisms for particles larger than 0.7 mm in the SiC50 filter based on a single collector efficiency model. In addition, the predicted collection efficiencies showed reasonably good agreement with the experimental ones.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Choi

Kim

et al. 2014

Aerosol Science and Technology

View full text Add to dashboard Cite

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“…Es hat eine hohe Temperatur-und Temperaturwechselbestän-digkeit, eine geringe thermische Ausdehnung und eine gute Beständigkeit gegen Kriechen bei hohen Temperaturen [8,9,11]. Erste Experimente mit SiC-basierten Filterkerzen in Vergasungsatmosphären zeigten jedoch, dass SiC in reduzierenden, wasserdampfreichen Atmosphären meist ungeeignet ist [25,26]. Die Ursache hierfür ist die um mindestens eine Größenordnung schnellere Oxidation von SiC in wasserdampfhaltiger Atmosphäre [25, 27 -30].…”

Section: Steineunclassified

Corrosion of Ceramic Materials for Allothermal Circulating Fluidized Bed Gasification

Schaafhausen

Müller

2014

Chemie Ingenieur Technik

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Corrosion of Ceramic Materials for Allothermal Circulating Fluidized Bed GasificationThe aggressive water vapour-and alkali-rich process environment of circulating fluidised bed gasification causes corrosion of several ceramic gasification components. Therefore, it is very important to find materials, especially refractory linings and hot gas filter candles, reliably working in a gasification environment. Here, the corrosion resistance of various refractories was characterized. Additionally, the feasibility and reliability of a ceramic hot gas filter system were examined.

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“…Porous SiC ceramic can be applied in many areas, such as for catalyst supports [1], hot gas or molten metal filters [2][3][4], high temperature membrane reactors [5], thermal insulating materials [6], gas sensors [7].…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity and Microstructure Properties of Porous SiC Ceramic Derived from Silicon Carbide Powder

Wu¹,

Ma²,

Chen³

et al. 2013

NJGC

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Porous SiC ceramic were prepared with silicon carbide powder as the aggregate, silicone resin as the binder and pore agent by the process of mixing, iso-static pressure molding, and calcination. The mechanical properties and microstructures of the samples were characterized with a universal testing machine, X-ray diffraction, scanning electron microscope, and mercury injection. Two main factors, molding pressures and silicone resin mass ratio were studied in the experiments. The thermal conductivity of the samples was tested. The compressive strength was up to 19.4 MPa, and the porosities up to 30%. The thermal conductivities, mainly influenced by porosities, increased from 0.68 W·m ·K−1 with the porosity decreasing from 41.96% to 31.30%.

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Environmental effects on microstructure and strength of SiC-based hot gas filters

Cited by 78 publications

References 14 publications

Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Corrosion of Ceramic Materials for Allothermal Circulating Fluidized Bed Gasification

Thermal Conductivity and Microstructure Properties of Porous SiC Ceramic Derived from Silicon Carbide Powder

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