Spontaneous ignition temperature for the compacted mixture of Ni–Al system: Experiment, theory, and comparisons

2013 ◽  
Vol 34 (2) ◽  
pp. 2197-2204 ◽  
Author(s):  
Atsushi Makino ◽  
D. Ichikawa ◽  
A. Matsumoto ◽  
T. Kanda ◽  
T. Watanabe
Keyword(s):  
Ignition Temperature ◽  
Spontaneous Ignition ◽  
System Experiment

scholarly journals Study on the Risk Assessment of Spontaneous Ignition and of Perilla Oil Cakes Associated Activation Energy

2021 ◽  
Vol 35 (2) ◽  
pp. 1-8
Author(s):  
Sung-Ho Byun ◽  
Yu-Jung Choi ◽  
Jae-Hoon Jeong ◽  
Jae-Wook Choi
Keyword(s):  
Activation Energy ◽  
Thermal Analysis ◽  
Ignition Temperature ◽  
Ignition Delay Time ◽  
Fire Risk ◽  
Spontaneous Ignition ◽  
Maximum Temperature ◽  
Perilla Oil ◽  
Oil Cakes ◽  
Critical Ignition

Perilla oil cakes are the residues of oil pressing processes, and used as fertilizers, feedstuff, food, etc. However, according to recent reports, perilla oil cakes often ignite spontaneously due to scorching heat, particularly in rice mills, general mills, and oil mills where large amounts of perilla oil cakes are stored. Thus, in this study, we attempted to elucidate the risk of spontaneous ignition of perilla oil cakes. For this purpose, thermogravimetry/differential thermal analysis (TG-DTA) was performed to identify thermal properties like weight reduction and heat generation, and spontaneous ignition was conducted for sample vessels of different thicknesses. The results showed that the ignition temperature of perilla oil cakes was 115 ℃ for the small (20 cm × 20 cm × 3 cm) vessel. The apparent activation energy associated with the critical ignition temperature was 60.74 kJ/mol. The ignition delay time and the time to reach maximum temperature were both found to increase with increasing vessel thickness. It was concluded that proper protection against heat must be in place because fire risk increases and spontaneous ignition can occur when large amounts of perilla oil cakes are accumulated.

Study of Polymeric Materials Burning

2013 ◽  
Vol 295-298 ◽  
pp. 471-474 ◽  
Author(s):  
Ivana Turekova ◽  
Zuzana Turňová ◽  
Peter Vekony ◽  
Martin Pastier
Keyword(s):  
Mass Loss ◽  
Ignition Temperature ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Polymeric Materials ◽  
Spontaneous Ignition ◽  
Hot Air

The article deals with determination of spontaneous ignition temperature and flash ignition temperature of polymeric materials and monitoring of mass loss rate during their degradation. An experiment was conducted in accordance with standard STN ISO 871: 2010 Plastics. Determination of ignition temperature using a hot-air furnace.

scholarly journals Study on Sensitivity Differences of Critical Spontaneous Ignition Temperature between Alcohol and Hydrocarbon Fuels Based on Reaction Pathway

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 475
Author(s):  
Qiang Liu ◽  
Zhongchang Liu ◽  
Xiaoming Ren ◽  
Yongqiang Han ◽  
Jun Wang ◽  
...  
Keyword(s):  
Ignition Temperature ◽  
Reaction Pathway ◽  
Reaction Pathways ◽  
Spontaneous Ignition ◽  
Maximum Temperature ◽  
Elementary Reactions ◽  
Auto Ignition ◽  
Alcohol Fuel ◽  
High Efficient ◽  
Emission Regulations

In this article, the critical spontaneous ignition temperature of both hydrocarbon and alcohol fuel was acquired on a constant volume combustion bomb platform by slowly heating the inner charges, and then followed by using the CHEMKIN-PRO software to simulate the auto-ignition-dominated characteristic and parameter sensitivity of the two kinds of fuels. Results revealed that in different conditions, the critical spontaneous ignition temperature of methanol changed dramatically, with a maximum temperature of 50 K, while the counterpart temperature of n-heptane remained an invariable value of 553 K within a large changeable scope of temperature, and only a maximum temperature of 10 K was observed. The maximum difference of spontaneous ignition temperature between methanol and n-heptane reached 270 K. At the same time, a minimum difference of 170 K was obtained as well. The complete reaction of methanol requires 5 steps, involving 6 components and 11 elementary reactions. However, for the comparative part-n-heptane, more than 20 main self-ignition reactions were involved, which indicated that the whole reaction process of n-heptane has more reaction pathway branches and it was much more complicated compared to methanol. The differences of the reaction pathways triggered a considerable distinction of critical self-ignition temperature between the two charges, making a “step-by-step” spontaneous ignition combustion mode possible. In this way, a further high-efficient and clean combustion can be available to cater to much more stringent emission regulations in the future.

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