首页|I-AO超细颗粒气溶胶抑制低阶煤自燃特性试验研究

I-AO超细颗粒气溶胶抑制低阶煤自燃特性试验研究

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针对煤的自燃灾害问题,使用含碘无机盐(NaI和KI)与抗氧化剂N-苯基-1-萘胺合成一种抑制煤自燃的高效超细复合气溶胶颗粒.通过同步热分析(TG-DTG-DSC)和红外光谱分析煤样自燃特性的变化以及官能团的分布和数量,利用扫描电镜测试观察煤样低温氧化时的表面孔隙结构变化.试验结果表明,同时经碘盐和抗氧化剂处理的煤样活化能在水分蒸发、热解和燃烧三个阶段分别平均提高了 7.22%、11.14%、47.77%.此外,—OH基团的数量平均减少了27.89%,含氧官能团主要包括碳氧键(Ar-O-C)、羧基(—COOH)和C=O键的数量平均下降了 40.62%.这些结果表明,含碘无机盐与抗氧化剂结合形成的复合超细颗粒气溶胶对褐煤的燃烧全过程都具有显著的抑制作用.研究结果表明碘盐-抗氧化剂超细颗粒气溶胶在防治.采空区煤自燃领域具有良好的潜力.
Experimental Study on the Inhibition of Spontaneous Combustion of Low Rank Coal by I-AO Ultrafine Particle Aerosol
Aiming at the problem of coal spontaneous combustion disaster,an efficient composite ultrafine particle aerosol for inhibiting coal spontaneous combustion was synthesized by using iodine-containing inorganic salts(NaI and KI)and antioxidant N-phenyl-1-naphthylamine.The changes of spontaneous combustion characteristics of coal samples as well as the distribution and quantity of functional groups were analyzed by simultaneous thermal analysis(TG-DTG-DSC)and FTIR spectroscopy.The surface pore structure changes of coal samples during low-temperature oxidation were observed by scanning electron microscopy.The experimental results show that the activation energy of coal samples treated with iodized salt and antioxidants increased by 7.22%,11.14%and 47.77%respectively in the three stages of water evaporation,pyrolysis and combustion.In addition,the number of-OH groups decreased by an average of 27.89%,and the number of oxygen-containing functional groups mainly including carbon-oxygen bonds(Ar-O-C),carboxyl(—COOH)and C=O bonds decreased by an average of 40.62%.These results indicate that the composite ultrafine particle aerosol formed by the combination of iodine-containing inorganic salts and antioxidants has a significant inhibitory effect on the whole combustion process of lignite,and has a good potential in the field of prevention and control of coal spontaneous combustion in goaf.

Coal spontaneous combustionIodine-containing inorganic saltAntioxidantUltrafine particle aerosol

齐浩、唐一博、刘洪刚、王琛琦、苏东洋

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太原理工大学安全与应急管理工程学院,山西太原 030024

煤自燃 碘盐 抗氧化剂 超细颗粒气溶胶

山西省自然科学基金山西留学人员科技活动择优资助项目

2021030212406220220010

2024

矿业研究与开发
长沙矿山研究院有限责任公司 中国有色金属学会

矿业研究与开发

CSTPCD北大核心
影响因子:0.763
ISSN:1005-2763
年,卷(期):2024.44(1)
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