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DC Field | Value | Language |
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dc.citation.endPage | 77 | - |
dc.citation.number | Sup 1 | - |
dc.citation.startPage | 65 | - |
dc.citation.title | ADVANCED COMPOSITE MATERIALS | - |
dc.citation.volume | 28 | - |
dc.contributor.author | Sohn, Jeong Sun | - |
dc.contributor.author | Rho, Seon-Gyun | - |
dc.contributor.author | Sohn, Jun Youn | - |
dc.contributor.author | Lim, Min-Hwa | - |
dc.contributor.author | Sadhasivam, T. | - |
dc.contributor.author | Lim, Hankwon | - |
dc.contributor.author | Ryi, Shin-Kun | - |
dc.contributor.author | Jung, Ho-Young | - |
dc.date.accessioned | 2023-12-21T19:45:20Z | - |
dc.date.available | 2023-12-21T19:45:20Z | - |
dc.date.created | 2018-08-01 | - |
dc.date.issued | 2019-01 | - |
dc.description.abstract | An advanced solid reducing agent, i.e., a CaO/SiO2 composite has been optimized to improve the hydrogen fluoride (HF; a green house gas) elimination in semiconductor-based industrial applications. To avoid the Ca(OH)2 formation and enhance the HF removal efficiency of CaO, the hydrophobic properties of silica (SiO2) have used as a catalyst materials to enhance the stability of CaO/SiO2 solid reducing agent in the present investigation. The novel composite structure based on CaO/SiO2 was prepared using various concentrations of hydrophobic nano-silica sol and Ca(OH)2. The composite was characterized by contact angle goniometry, thermogravimetry analysis, and scanning electron microscopy. The water contact angle of the CaO/SiO2 composites significantly increased with increasing SiO2 content. In particular, angles of 61.6°, 73.7°, 84.8°, and 84.9° were obtained for SiO2 concentrations of 20, 40, 60, and 80 wt.%, respectively. These results suggest that the hydrophobic nature of the composites was improved with the addition of 60 and 80 wt.% of SiO2. Moreover, the surface properties were measured using the nitrogen Brunauer-Emmett-Teller method for obtaining the weight ratios (wt.%) and calcinations times. The determined specific surface areas (SSAs) were 16.19, 27.25, 32.86, and 40.56 m2/g for 80:20, 60:40, 40:60, and 20:80 CaO/SiO2 composites, respectively. From the water contact angle and SSA analysis, the optimum hydrophobic nature of CaO/SiO2 composites for HF removal was achieved at a weight ratio of 40:60 (Ca(OH)2/SiO2) at the calcination temperature of 650 °C. The perfluorinated compound (PFC) removal rate is 80 and 88% for a common regenerative catalytic system (RCS) catalyst and the CaO/SiO2 reaction-enhanced (RE)-RCS catalyst, respectively. In addition, higher amount of HF elimination is successfully achieved using CaO/SiO2 solid reducing agent. During the RE-RCS process, SiO2 acts as a catalyst to prevent the formation of Ca(OH)2 when CaO is exposed to water. | - |
dc.identifier.bibliographicCitation | ADVANCED COMPOSITE MATERIALS, v.28, no.Sup 1, pp.65 - 77 | - |
dc.identifier.doi | 10.1080/09243046.2018.1458484 | - |
dc.identifier.issn | 0924-3046 | - |
dc.identifier.scopusid | 2-s2.0-85045074634 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/24466 | - |
dc.identifier.url | https://www.tandfonline.com/doi/full/10.1080/09243046.2018.1458484 | - |
dc.language | 영어 | - |
dc.publisher | TAYLOR & FRANCIS LTD | - |
dc.title | Efficient solid reducing agent CaO/SiO2 hybrid composite for hydrogen fluoride elimination | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | calcium oxide | - |
dc.subject.keywordAuthor | hydrophobic silica | - |
dc.subject.keywordAuthor | composite | - |
dc.subject.keywordAuthor | solid reducing agent | - |
dc.subject.keywordAuthor | HF elimination | - |
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