Inhibition Effect of Coal Spontaneous Combustion by Composite Inhibitory Foam Based on CaCl2-Melatonin Inhibitor

被引:2
|
作者
Zhang, Hong [1 ]
Zhao, Zongquan [1 ]
Wang, Zihan [1 ]
Nie, Shibin [2 ,3 ]
Han, Chao [1 ]
机构
[1] Anhui Univ Sci & Technol, Coll Safety Sci & Engn, Huainan 232001, Anhui, Peoples R China
[2] Anhui Univ Sci & Technol, Coll Publ Secur & Emergency Management, Hefei 231131, Anhui, Peoples R China
[3] Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230000, Anhui, Peoples R China
来源
ACS OMEGA | 2024年 / 9卷 / 11期
关键词
FIRE-PREVENTION; GEL; OXIDATION;
D O I
10.1021/acsomega.3c10258
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Inhibitory foam technology plays an important role in inhibiting coal spontaneous combustion. To enhance the stability and inhibitory performance of inhibitory foam for coal spontaneous combustion, a novel physicochemical composite inhibitor was developed in this work. CaCl2 was chosen as an inorganic salt physical inhibitor to compound with the chemical inhibitor melatonin (MLT) due to its corresponding good foam stability. When the mass ratio of CaCl2 to MLT was 4:1, the lowest CO release concentration of 7337.06 ppm at 200 degrees C was observed in the composite inhibitor-treated coal. Furthermore, the addition of 20 wt % of the composite inhibitor resulted in a foam half-life of 3067 min, which was 5.89 times longer than that of the water-based foam. In comparison with the water-based foam, the inhibitory foam based on 20 wt % CaCl2-MLT composite inhibitor exhibited more excellent foam stability, wetting ability, and inhibition performance. The release of CO at 200 degrees C was 7854.6 ppm, showing a reduction of 63.2% compared to the raw coal. Moreover, the composite inhibitory foam could significantly delay the onset of the characteristic temperature and reduce the weight change during the decomposition stage by 12.8%.
引用
收藏
页码:13323 / 13331
页数:9
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