[논문]참깻묵의 자연발화온도와 활성화 에너지를 통한 화재 및 폭발의 위험성 평가

변성호; 최유정; 유두열; 김경수; 오재근; 문병선; 최재욱

doi:10.9713/kcer.2021.59.2.225

참깻묵의 자연발화온도와 활성화 에너지를 통한 화재 및 폭발의 위험성 평가
Assessment of the Risks of Fire and Explosion through the Spontaneous Ignition Temperature and Activation Energy of Sesame Seed Oil Cakes 원문보기

Korean chemical engineering research = 화학공학, v.59 no.2, 2021년, pp.225 - 231

변성호 (부경대학교 소방공학과) , 최유정 (부경대학교 소방공학과) , 유두열 (부경대학교 소방공학과) , 김경수 (부경대학교 소방공학과) , 오재근 (국립과학수사연구원) , 문병선 (국립과학수사연구원) , 최재욱 (부경대학교 소방공학과)

초록
AI-Helper

참깻묵은 4류 위험물 중 동식물류로서 기름을 추출하고 생성된 찌꺼기를 보관하는 중에 열이 축적되어 자연발화의 원인에 의해 화재가 발생되고 있다. 참깻묵의 자연발화에 대한 원인을 규명하기 위하여 시료용기의 두께(3 cm, 5 cm, 7 cm 및 14 cm)를 변화시켜 저장량에 따른 자연발화온도를 구한 결과 3 cm의 경우 180 ℃, 5 cm의 경우160 ℃, 7 cm의 경우 145 ℃, 14 cm의 경우 130 ℃를 구하였다. 시료용기의 두께가 두꺼워질수록 발화한계온도는 낮아졌으며, 발화지연시간 및 최고온도에 도달하는 시간이 길어졌다. 또한 발화와 비발화의 평균온도인 발화한계온도에 의한 겉보기 활성화 에너지는 97.10 [kJ/mol]로서 참깻묵의 발화특성을 파악하였다.

Abstract ▼ AI-Helper

Sesame seed oil cakes are classified as the animal or plant origin among the flammable liquids, and the fire occurs due to the spontaneous ignition through the accumulation of heat during the storage of residues after the extraction of sesame oil. In order to elucidate the cause of the spontaneous ignition of sesame seed oil cakes, the thickness (3 cm, 5 cm, 7 cm and 14 cm) of the sample container was varied, and the spontaneous ignition temperature was measured depending on the storage volume. Thus, the spontaneous ignition temperature was measured to be 180 ℃ at the thickness of 3 cm, 160 ℃ at 5 cm, 145 ℃ at 7 cm and 130 ℃ at 14 cm. As the thickness of the sample container increased, the critical ignition temperature decreased, and the induction time to spontaneous ignition and the time to reach the maximum temperature became longer. Furthermore, the apparent activation energy by the critical ignition temperature, which is the average temperature of ignition and non-ignition, was 97.10 [kJ/mol]. With these data, ignition characteristics of sesame seed oil cakes were determined.

주제어

표/그림 (14)

그림 Fig. 1. TG-DTA analysis of sesame seed oil cakes.
그림 Fig. 2. Schematic diagram of experimental apparatus for spontaneous ignition temperature measurement. 1. Electric furnace 6. Sirocco fan 2. Sample 7. Heater 3. Program controller 8. Fan 4. Temperature recorder 9. Chromel-alumel thermocouple 5. Relay switch
그림 Fig. 3. Relation between time and temperature for sesame seed oil cakes in 3 cm vessel (at 175 ºC).
그림 Fig. 4. Relation between time and temperature for sesame seed oil cakes in 3 cm vessel (at 180 ºC).
그림 Fig. 5. Relation between time and temperature for sesame seed oil cakes in 5 cm vessel (at 155 ºC).
그림 Fig. 6. Relation between time and temperature for sesame seed oil cakes in 5 cm vessel (at 160 ºC).
그림 Fig. 7. Relation between time and temperature for sesame seed oil cakes in 7 cm vessel (at 140 ºC).
그림 Fig. 8. Relation between time and temperature for sesame seed oil cakes in 7 cm vessel (at 145 ºC).
그림 Fig. 9. Relation between time and temperature for sesame seed oil cakes in 14 cm vessel (at 125 ºC).
그림 Fig. 10. Relation between time and temperature for sesame seed oil cakes in 14 cm vessel (at 130 ºC).
그림 Fig. 11. Relation between ignition delay time and thickness for ses-ame seed oil cakes.
그림 Fig. 12. Relation between maximum temperature recording time and thickness for sesame seed oil cakes.
그림 Fig. 13. Determination of activation energy for sesame seed oil cakes.
표 Table 1. Relation between critical spontaneous ignition temperature and thickness in each sample vessel for sesame seed oil cakes

참고문헌 (18)

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상세보기
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원문보기 상세보기
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상세보기
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원문보기 상세보기
Kim, H. S., Choi, Y. J., Kim, J. H., Jeong, P. H. and Choi, J. W., "A Study on the Ignition Temperature and Ignition Induction Time According to Storage Amount of Wood Pellets," Fire Science and Engineering, 33(1), 7-14(2019).
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