크실렌 이성질체의 인화점과 최소자연발화온도의 측정

하동명(Dong Myeong Ha),이성진(Sung Jin Lee) 한국가스학회 2009 한국가스학회지 Vol.13 No.4

MSDS 자료의 적정성을 고찰하기 위해 크실렌 이성질체에 대해 Pensky-Martens 밀폐식(ASTM D93), Setaflash 밀폐식(ASTM D3278), Tag 개방식(ASTM D1310), Cleveland 개방식(ASTM D92)장치 등을 이용하여 인화점을 측정하였으며, 또한 최소자연발화온도는 ASTM E659-78장치를 사용하여 측정하고, 문헌값들과 한국산업안전보건공단의 MSDS 자료와 비교하였다. 그 결과, 측정된 인화점과 최소자연발화온도는 이들과 차이를 나타내어 안전의 목적을 위해 연소특성치 고찰이 필요함을 알 수 있었다. In order to investigate the compatibility of data in MSDS(Material Safety Data Sheet), the flash point of xylene isomer was measured by using Pensky-Martens closed cup (ASTM D93), Setaflash closed cup(ASTM D3278), Tag open cup(ASTM D1310), and Cleveland open cup (ASTM D92) testers. Also, the AITs(autoignition temperatures) of xylene isomers were measured by using ASTM E659-78 tester. The measured the flash points and the AITs were compared with literatures and MSDS in KOSHA(Korea Occupational Safety and Health Agency). The measured the flash points and the AITs were different from those in literatures and MSDS. As a result, this paper is shown that it is needed to investigate combustion characteristics of xylene isomer for the fire safety objectives.

Trichlorosliane 및 Dichlorosilane-Trichlorosliane 혼합물의 자연발화 특성

하동명(Dong Myeong Ha) 한국가스학회 2010 한국가스학회지 Vol.14 No.4

최소자연발화온도(AIT, autoignition temperature)의 정확한 정보는 산업화재를 예방하고 제어하는데 중요하다. 본 연구에서는 ASTM E659-78 장치를 이용하여 트리클로로실란 순수물질 그리고 디클로로실란(DCS)과 트리클로로실란(TCS) 혼합물의 AIT를 측정하였다. 트리클로로실란의 AIT는 225℃로 측정되었으며, TCS(90wt%)-DCS(10wt%) 혼합물은 250℃, TCS(70wt%)-DCS(30wt%) 혼합물은 각각 236℃에서 발화가 발생하였다. An accurate information of the autoignition temperature(AIT) is important in developing appropriate prevention and control measures in industrial fire. This study measured the AITs of trichlorosliane and dichlosilane(DCS)-trichlorosliane(TCS) mixtures by using ASTM E659-78 apparatus. The experiment AITs of trichlorosliane, TCS(90wt%)-DCS(10wt%) and the TCS(70wt%)-DCS(30wt%) were 225℃, 250℃, and 236℃, respectively.

Toluene과 iso-Propanol계 및 p-Xylene과 n-Butanol계의 자연발화온도 측정

윤여송,하동명,유현식,이영순 한국화재소방학회 2010 한국화재소방학회논문지 Vol.24 No.2

The values of the AIT (autoignition temperature) for fire and explosion protection are normally the lowest reported. The MAITB (Minimum Autoignition Temperature Behavior) of flammable liquid mixture is exhibited when the AITs of mixture is below the AIT of the individual components. The MAITB is an interesting experimental features, which can be significant from the perspective of industrial fire safety. In this study, the AITs of toluene + iso-propanol(IPA) and p-xylene + n-butanol systems were measured using ASTM E659-78 apparatus. The AITs of toluene, iso-propanol (IPA), pxylene and n-butanol which constituted two binary systems were 547oC, 463oC, 557oC and 340oC respectively. The toluene + iso-propanol(IPA) system is exhibited MAITB at 0.3 mole fraction of toluene,and its minimum autoignition temperature was 460oC. 가연성 혼합물의 최소자연발화온도 거동(MAITB, Minimum Autoignition Temperature Behavior)은 어떤 조성에서 두개의 순수물질 가운데 낮은 물질의 AIT보다 낮은 AIT를 갖는 현상을 말하며, 이는 위험물을 취급하는 공정에서 매우 관심있는 분야이다. 본 연구는 ASTM E659-78(Standard Test Method for Autoignition Temperature of Liquid Chemical)을 이용하여 toluene과 iso-propanol(IPA) 및 p-xylene과n-butanol혼합물의 최소자연발화온도를 측정하였다. Toluene, IPA, p-xylene 그리고 n-butanol의 자연발화온도는 각각 547oC, 463oC, 557oC, 340oC였다. Toluene과 iso-propanol(IPA) 계의 경우는 3 : 7(Toluene :IPA) 비율의 혼합물 일 때는 IPA순수물질(464oC)보다 자연발화온도가 약 3oC 낮은 혼합물의 최소자연발화온도거동 MAITB(Minimum Autoignition Temperature Behavior)을 보였다.

가연성물질의 자연발화온도 측정 및 예측 : 메탄올과 에탄올 Methanol and Ethanol

하동명 한국안전학회 2004 한국안전학회지 Vol.19 No.2

Flammable substances are frequently used chemical industry processes. An accurate knowledge of the AITs(Autoignition Temperatures) is important in developing appropriate prevention and control measures in industrial fire protection. The AITs describe the minimum temperature to which a substance must be heated, without the application of a flame or spark, which will cause that substance to ignite. The AITs are dependent upon many factors, namely initial temperature, pressure, volume, fuel/air stoichiometry, catalyst material, concentration of vapor, ignition delay. This study measured relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for methanol and ethanol. The A.A.P.E.(Average Absolute Percent Error) and the A.A.D.(Average Absolute Deviation) of the experimental and the calculated delay times by the AITs for methanol were 14.59 and 1.76 respectively. Also the A.A.P.E. and the A.A.D. of the experimental and the calculated delay times by the ATIs for ethanol were 8.33 and 0.88.

가솔린탱크의 위험성평가를 위한 노말헵탄의 연소특성치 측정 및 고찰

하동명,정기신,이성진,조용선,윤명오 한국화재소방학회 2010 한국화재소방학회논문지 Vol.24 No.6

For the safe handling of n-heptane, the explosion limit at 25oC, the temperature dependence of the explosion limits and the lower flash point were investigated. And AITs (auto-ignition temperatures)by ignition time delay for n-heptane were experimented. By using the literatures data, the lower and upper explosion limits of n-heptane recommended 1.0 Vol% and 7.0 Vol%, respectively. And the lower flash points of n-heptane recommended −4oC. This study measured relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for n-heptane and the experimental AIT of n-hexane was 225oC. The new equation for predicting the temperature dependence of the explosion limits of n-heptane is proposed. The values calculated by the proposed equations were a good agreement with the literature data. 노말헵탄의 안전한 취급을 위해서 25oC에서 폭발한계와 폭발한계 온도의존성 그리고 하부인화점을 고찰하였다. 또한 발화지연시간에 의한 발화온도를 측정하였다. 공정의 안전을 위해서 노말헵탄의 폭발하한계는 1.0Vol%, 상한계는 7.0Vol%를 추천하였고, 하부인화점은 −4oC를 추천하였다. ASTM E659-78 장치를 사용하여 발화온도와 발화지연시간을 측정하였고, 여기서 측정된 최소자연발화온도는 225oC였다. 그리고 노말헵탄의 새로운 폭발한계 온도의존식을 제시하였으며, 제시된 식은 문헌값과 일치하였다.

사이클로헥사논의 화재 및 폭발 특성치의 측정 및 고찰

하동명 한국화재소방학회 2011 한국화재소방학회논문지 Vol.25 No.4

For the safe handling of cyclohexanone, the explosion limits at 25℃ were investigated. The lower flash points and AITs (auto-ignition temperatures) by ignition time delay for cyclohexanone were experimented. By using the literatures data, the lower and upper explosion limits of cyclohexanone recommended 1.1 Vol.% (100℃) and 9.4 Vol.%, respectively. The lower flash points of cyclohexanone were experimented 42~43℃by using closed-cup tester and 49~51℃by using open cup tester. This study measured relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for cyclohexanone and the experimental AIT of cyclohexanone was 415℃. 사이클로헥사논의 안전한 취급을 위해서 25℃에서 폭발한계를 고찰하였고, 실험장치를 이용하여 하부인화점과 발화지연시간에 의한 발화온도를 측정하였다. 공정의 안전을 위해서 사이클로헥사논의 폭발하한계는 1.1 Vol.%(100℃), 상한계는 9.4 Vol.%를 추천하였고, 하부인화점은 밀폐계에서 42~43℃와 개방식에서 49~51℃로 측정되었다. ASTM E659-78 장치를 사용하여 자연발화온도와 발화지연시간을 측정하였고, 여기서 측정된 최소자연발화온도는 415℃였다.

산류(Acids)의 인화점과 최소자연발화온도의 신뢰성 고찰

하동명 ( Dong Myeong Ha ) 한국안전학회 2009 한국안전학회지 Vol.24 No.4

The flash point and the AIT(auto-ignition temperature) are the most important combustible properties used to determine the potential for the fire and explosion hazards of flammable material. In order to know the accuracy of data in MSDS(Material Safety Data Sheet), the flash point of n-acids were measured by using Pensky-Martens closed cup tester(ASTM D93), Setaflash closed cup tester(ASTM D3278), Tag open cup tester(ASTM D1310) and Cleveland open cup tester(ASTM D92). Also, the AIT of n-acids were measured by using ASTM E659-78 tester. The measured the flash points and the AIT were compared with literatures and MSDS in KOSHA. The measured the flash points and the AIT were different from those in literatures and MSDS. Therefore, This paper shows that it is needed to investigate the MSDS compatibility of n-acids for the fire safety objectives.

오토자일렌과 노말펜탄올 계의 최소자연발화온도 측정

하동명 ( Dong Myeong Ha ),이성진 ( Sung Jin Lee ) 한국안전학회 2006 한국안전학회지 Vol.21 No.4

BTX(Benzene, Toluene, Xylenes)의 자연발화온도와 발화지연시간의 측정

하동명 ( Dong Myeong Ha ) 한국안전학회 2006 한국안전학회지 Vol.21 No.3

가연성 이성분계의 최소자연발화온도 거동(MAITB)

하동명 ( Dong Myeong Ha ),이성진 ( Sung Jin Lee ) 한국안전학회(구-한국산업안전학회) 2008 한국안전학회지 Vol.23 No.6