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철골조 모듈러 유닛의 현장시공 보-보 결합 구조체의 3시간 내화성능에 관한 실험적 연구
장활제(Jang, Hwal-Je),송재은(Song, Jae-Eun),김양범(Kim, Yang-Bum),김경수(Kim, Kyung-Su),안용한(Ahn, Yong-Han) 대한건축학회 2024 대한건축학회논문집 Vol.40 No.2
This study aims to assess the 3-hour fire resistance capabilities of a beam-to-beam combination structure, mirroring the on-site assembly features of the modular construction method. A specific detail for the 3-hour fire resistance of the beam-to-beam combination structure was put forth, followed by a non-load heating test utilizing a horizontal heating furnace. In this proposed detail, fireproof gypsum boards cover the beams of individual modular units, the linear joint between on-site installed beams is filled with fireproof insulation or ceramic wool, and a fireproof sealant is applied for non-flammability assurance. The results from two rounds of 3-hour fireproof tests demonstrated satisfactory fireproof performance.
철골조 모듈러 유닛의 현장시공 보-보 결합 구조체의 3시간 내화성능에 관한 실험적 연구
장활제(Jang, Hwal-Je),송재은(Song, Jae-Eun),김양범(Kim, Yang-Bum),안용한(Ahn, Yong-Han) 대한건축학회 2023 대한건축학회 학술발표대회 논문집 Vol.43 No.2
The purpose of this study is to examine the 3-hours fire resistance performance of the beam to beam combination structure reflecting the on-site assembly characteristics of the modular construction method. A detail of 3-hours fire resistance beam to beam combination structure was proposed and a non-load heating test was conducted using a horizontal heating furnace. In the proposed detail, 1) the beams of individual modular units are covered using fireproof gypsum boards, 2) the linear joint between the beams after on-site installation is filled with fireproof insulation(cerakwool), and 3) Finally, fireproof sealant is constructed to ensure inflammable. The results of two times 3-hours fireproof tests showed that the fireproof performance was satisfied.
Articles : Low Temperature Oxidation of CO over Supported PdCl2-CuCl2 Catalysts
( Dong Jun Koh ),( Jae Hwal Song ),( Sung Won Ham ),( In Sik Nam ),( Rae Woong Chang ),( Eun Duck Park ),( Jae Sung Lee ),( Young Gul Kim ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.6
PdCl₂-CuCl₂catalyst supported on activated carbon was examined for the low temperature oxidation of CO. The catalyst developed in the present study was active and stable at ambient conditions if water were existing in the feed gas stream. The addition of Cu(NO₃)₂into the PdCl₂-CuCl₂catalyst significantly enhanced the CO oxidation activity. X-ray diffraction study revealed that the role of Cu(NO₃)₂was to stabilize active Cu(Ⅱ) species, Cu₂Cl(OH)₃, on the catalyst surface which maintains the redox property of palladium. When HCl and SO₂were also existing in the feed, they easily inactivated the catalyst. It was found that HCl and SO₂inhibited the formation of active Cu(Ⅱ) species on the catalyst surface.
LOW TEMPERATURE OXIDATION OF CO OVER SUPPORTED PdCl2-CuCl2 CATALYSTS
Nam, In Sik,Koh, Dong Jun,Song, Jae Hwal,Ham, Sung Won,Chang, Rae Woong,Park, Eun Duck,Lee, Jae Sung,Kim, Young Gul 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.6
PdCl₂-CuCl₂catalyst supported on activated carbon was examined for the low temperature oxidation of CO. The catalyst developed in the present study was active and stable at ambient conditions if water were existing in the feed gas stream. The addition of Cu(NO₃)₂into the PdCl₂-CuCl₂catalyst significantly enhanced the CO oxidation activity. X-ray diffraction study revealed that the role of Cu(NO₃)₂was to stabilize active Cu(Ⅱ) species, Cu₂Cl(OH)₃, on the catalyst surface which maintains the redox property of palladium. When HCl and SO₂were also existing in the feed, they easily inactivated the catalyst. It was found that HCl and SO₂inhibited the formation of active Cu(Ⅱ) species on the catalyst surface.
Friedel - Crafts 알킬화 반응을 이용한 나프탈렌류의 선택적 이소프로필화 반응
이경희,김시환,강경보,양오봉,송재활 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.4
AlCl₃촉매를 이용한 나프탈렌과 2-methylnaphthalene(2-MN)의 선택적 이소프로필화 반응에서 반응활성과 2,6-체에 대한 선택도는 용액의 극성, 알킬화제의 종류 및 반응시간과 온도에 큰 영향을 받았다. 비극성용매(헥산 또는 이소옥탄)에 반응물(나프탈렌 또는 2-MN)의 2배 정도의 isopropylbromide를 알킬화제로 사용하였을 때 반응활성과 2,6-dialkylnaphthalene의 선택성이 우수하게 나타났다. 또한 반응시간과 반응온도(4℃-60℃ 사이에서)가 증가하면 반응활성과 2,6-DIPN에 대한 선택도가 증가하였다. 반응물로서 2-MN을 사용한 경우가 나프탈렌을 사용한 경우보다 2,6-체에 대한 선택도가 2배 이상 높았다. The reactivity and selectivity to 2,6-dialkylnaphthalene were affected by the polarity of solvent, alkylating agent, reaction time and reaction temperature in the selective isopropylation of naphthalene or 2-methylnaphthalene(2-MN) with AlCl₃ catalyst. Reaction with isopropylbromide as an alkylating agent in non-polar solvents(hexane or isooctane) was found to be a good system for the higher activity and selectivity to 2,6-dialkylnaphthalene. The reactivity and selectivity were increased as increasing the reaction time and temperature(between 4℃ and 60℃). When 2-MN was used as a substrate, the selectivity to 2,6-DIPN was 2 times higher than naphthalene was used.