Low-temperature sintering of silicon carbide membrane supports from disks to single- and 19-channel tubes

Zhou, Jian; Gu, Qilin; Liu, Feng; Feng, Shasha; Zhong, Zhaoxiang; Xing, Weihong

doi:10.1016/j.jeurceramsoc.2022.01.051

Cited by 21 publications

(10 citation statements)

References 41 publications

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“…Advancement in current treatment solutions enables simultaneous treatment of NO and PM without requiring multiple unit operations, thus eliminating fast deactivation of denitration catalysts caused by the exposure of active sites to the PMs 7 . Silicon carbide (SiC) filter, which has great thermal shock resistance and chemical stability, is an industrially preferred ceramic material for exhausts filtration 2,8–11 . By integrating the SiC filter with catalytically active components, a multifunctional SiC catalytic filter can be fabricated for treating current industrial gases consisting of NO and PM 2,12,13 .…”

Section: Introductionmentioning

confidence: 99%

“…7 Silicon carbide (SiC) filter, which has great thermal shock resistance and chemical stability, is an industrially preferred ceramic material for exhausts filtration. 2,[8][9][10][11] By integrating the SiC filter with catalytically active components, a multifunctional SiC catalytic filter can be fabricated for treating current industrial gases consisting of NO and PM. 2,12,13 Nevertheless, current processing techniques for SiC catalytic filter require multiple processing steps which is not only unnecessarily complex and slow, but also inevitably leads to weaker binding strength of the catalyst with the SiC filter.…”

Section: Introductionmentioning

confidence: 99%

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Readily processed multifunctional SiC catalytic filter for industrial emissions control

et al. 2022

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One step fabrication of SiC catalytic filter is currently limited by the mismatched calcination temperature between SiC filter (>1700 C) and the catalysts (<800 C), and the difficulty in the chemical immobilization of catalysts. Here, a SrTi 1Àx Co x O 3 -SiC (STC-SiC) catalytic filter was directly fabricated from raw SiC grains and STC precursor oxides (SrCO 3 , TiO 2 , and Co 3 O 4 ) via a single-step reactive thermal processing (SRTP) approach, which significantly reduced energy consumption and sintering time over 50%. Acid etching enables the active TiO 2 and Co 3 O 4 nanoparticles spontaneously formed on STC catalysts in STC-SiC catalytic filter (STC-SiC-A), which induces the generation of oxygen vacancies and facilitates the adsorption and activation of O 2 and NO. The STC-SiC-A catalytic filter exhibits highly competitive NO oxidation of 60% and complete dust interception (100%) at 360 C. This work demonstrates an efficient and rapid processing technique of SiC based catalytic filters, which can also be implemented on other ceramic-based catalytic filters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Readily processed multifunctional SiC catalytic filter for industrial emissions control

et al. 2022

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“…For thermal effects analysis, a part of the dried support (mass ratio loess: fly ash: CMC=54:36:6) was taken, milled into a powder, and heated to 1300 °C at a rate of 10 °C min −1 , as indicated in figure 3. Evaporation of water and decomposition of organic matter [20] may be the main causes of weight loss of the support from room temperature to 500 °C. The decomposition of substantial organic content in the raw material to create gas causes a significant weight loss (about 5.5%) at 500 °C-00 °C.…”

Section: Thermal Analysismentioning

confidence: 99%

Optimisation of additives on the performance of loess/fly ash-based ceramic membrane supports

Tong

Wang

Yang

et al. 2022

Mater. Res. Express

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Inorganic ceramic membranes have received a lot of attention due to their resistance to acid and alkali corrosion and ease of cleaning and utilisation, however, their high cost has limited their widespread use. To obtain lower-cost ceramic membranes with better performance, in this paper, single-channel tubular ceramic membrane supports were prepared using natural loess and solid waste fly ash as raw materials. This paper firstly investigated the effects of various additives (including carboxymethyl cellulose (CMC), graphite, calcium carbonate, copper oxide, magnesium oxide, and manganese dioxide,) on the pore size distribution, pure water flux, and flexural strength of the supports to select the appropriate additives; secondly, the response surface methodology was used to determine the amount of each parameter to be added. The results showed that CMC was more viscous and malleable compared to graphite and CaCO3, thus increasing the density and pure water flux of the supports. MnO2 improved both the pure water flux and flexural strength of the supports compared to CuO and MgO. The best sample was obtained when the contents of CMC, MnO2, and kaolinite were 9.85 wt%, 10.62 wt%, and 4.8 wt%, respectively, the best sample obtained exhibited a pure water flux of 4985.52 L·m-2·h-1·MPa-1 and a flexural strength of 45.4 MPa. The support obtained meets the conditions for the application of porous ceramic carriers and provides a viable pathway for the wide application of low-cost ceramic membrane carriers.

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“…Consequently, the performance of SiC catalytic membranes in terms of separation and catalysis is compromised. 32,33 The industrial application requires high processing capacity and efficiency that is currently beyond the capabilities of existing SiC catalytic membranes. 34 As a result, there is an urgent need to scale up the fabrication of SiC catalytic membranes while preserving their high filtration and catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

“…However, ongoing research remains limited to small‐scale SiC catalytic membranes, typically up to 30 mm in diameter, primarily due to challenges related to the uncontrollable structural defects and the loss of active components, particularly at larger‐scale production. Consequently, the performance of SiC catalytic membranes in terms of separation and catalysis is compromised 32,33 . The industrial application requires high processing capacity and efficiency that is currently beyond the capabilities of existing SiC catalytic membranes 34 .…”

Section: Introductionmentioning

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

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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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Low-temperature sintering of silicon carbide membrane supports from disks to single- and 19-channel tubes

Cited by 21 publications

References 41 publications

Readily processed multifunctional SiC catalytic filter for industrial emissions control

Readily processed multifunctional SiC catalytic filter for industrial emissions control

Optimisation of additives on the performance of loess/fly ash-based ceramic membrane supports

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

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Low-temperature sintering of silicon carbide membrane supports from disks to single- and 19-channel tubes

Cited by 21 publications

References 41 publications

Readily processed multifunctional SiC catalytic filter for industrial emissions control

Readily processed multifunctional SiC catalytic filter for industrial emissions control

Optimisation of additives on the performance of loess/fly ash-based ceramic membrane supports

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

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