TY  - JOUR
PY  - 2019//
TI  - Flame suppression mechanism of aluminum dust cloud by melamine cyanurate and melamine polyphosphate
JO  - Journal of hazardous materials
A1  - Jiang, Haipeng
A1  - Bi, Mingshu
A1  - Ma, Daqing
A1  - Li, Bei
A1  - Cong, Haiyong
A1  - Gao, Wei
SP  - 797
EP  - 810
VL  - 368
IS  - 
N2  - The suppression effect of melamine cyanurate (MCA) and melamine polyphosphate (MPP) on the flame propagation of aluminum dust were studied experimentally. The results indicated that the concentration of MPP required to supress the aluminum dust explosion was lower than MCA. As the concentration of suppressant increased, the acceleration and the maximum flame speed extremely decreased, and the flame morphology became isolated spot flames. The MPP addition exerted a stronger suppression effect on the temperature of aluminum flame compared to MCA addition. Meanwhile, the mechanism of flame suppression was further investigated. Decomposition of MCA and MPP particles could absorb the heat released from the flame front. Scanning electron microscopy demonstrated that the gas phase reaction of aluminum particles was suppressed by MCA and MPP, resulting in a larger particle size of the explosion products. XRD results indicated that MCA and MPP did not react with aluminum. Gaseous products of suppressant decomposition altered flame chemistry by radically recombining O atom and reducing AlO, which resulted in less amount of heat release, lower flame speed and lower flame temperature.<br><br>Copyright © 2019 Elsevier B.V. All rights reserved.<p />  <p>Language: en</p>
LA  - en
SN  - 0304-3894
UR  - http://dx.doi.org/10.1016/j.jhazmat.2019.02.001
ID  - ref1
ER  -