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Effect of fluorine-containing explosion suppressants on methane explosions.
- Source :
- Journal of Thermal Analysis & Calorimetry; Apr2024, Vol. 149 Issue 8, p3711-3722, 12p
- Publication Year :
- 2024
-
Abstract
- To investigate the suppression effect of fluorine-containing explosion suppressants (FESs) on methane (CH<subscript>4</subscript>) explosions and the corresponding suppression mechanism, a 20-L spherical explosion testing device was used to analyze and compare the effects of perfluorohexanone (C<subscript>6</subscript>F<subscript>12</subscript>O) and heptafluoropropane (C<subscript>3</subscript>F<subscript>7</subscript>H) on CH<subscript>4</subscript> explosion parameters. The explosion limit and pressure were obtained before and after adding these FESs. CH<subscript>4</subscript> explosion triangles under the action of the FESs were drawn, and the explosion hazard degree (F) was determined. The results reveal that the addition of C<subscript>6</subscript>F<subscript>12</subscript>O and C<subscript>3</subscript>F<subscript>7</subscript>H reduces the upper explosion limit (UEL) and lower explosion limit (LEL) of CH<subscript>4</subscript>, with increased concentrations of C<subscript>6</subscript>F<subscript>12</subscript>O and C<subscript>3</subscript>F<subscript>7</subscript>H causing faster decreases in the UEL than in the LEL. The explosion limit range of CH<subscript>4</subscript> with C<subscript>6</subscript>F<subscript>12</subscript>O is smaller than that with C<subscript>3</subscript>F<subscript>7</subscript>H. When the concentration of CH<subscript>4</subscript> is low, increases in the C<subscript>6</subscript>F<subscript>12</subscript>O and C<subscript>3</subscript>F<subscript>7</subscript>H concentrations first cause an increase and then a decrease in the explosion pressure, and the rise rate of explosion pressure increases. After adding the aforementioned FESs, F first increases and then decreases. When the concentration of CH<subscript>4</subscript> is high, the two FESs only inhibit the explosion pressure. Compared with C<subscript>3</subscript>F<subscript>7</subscript>H, C<subscript>6</subscript>F<subscript>12</subscript>O has a stronger inhibitory effect; C<subscript>6</subscript>F<subscript>12</subscript>O has a smaller CH<subscript>4</subscript> explosion triangle area, higher critical oxygen concentration (18.27% vs. 17.70%), and lower F value. Both FESs have promotion and inhibition effects on CH<subscript>4</subscript> explosion because of the comprehensive physical and chemical effects on CH<subscript>4</subscript> explosions; however, the performance of C<subscript>6</subscript>F<subscript>12</subscript>O is superior to C<subscript>3</subscript>F<subscript>7</subscript>H. [ABSTRACT FROM AUTHOR]
- Subjects :
- EXPLOSIONS
FLAMMABLE limits
METHANE
TRIANGLES
Subjects
Details
- Language :
- English
- ISSN :
- 13886150
- Volume :
- 149
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Journal of Thermal Analysis & Calorimetry
- Publication Type :
- Academic Journal
- Accession number :
- 176650921
- Full Text :
- https://doi.org/10.1007/s10973-024-12967-2