瓦斯爆炸炭黑结构及产生机理分析

发布时间：2018-05-28 01:20

本文选题：瓦斯爆炸 + 炭黑　；参考：《北京理工大学学报》2017年04期

【摘要】：瓦斯爆炸过程中视窗处出现的亮斑现象,分析确定为爆炸过程中产生的有高热辐射特性的炭黑.利用低温液氮吸附比表面积分析仪、扫描电镜(SEM)、透射电镜(TEM)和傅里叶红外光谱等方法,分析了瓦斯浓度下爆炸产生炭黑的孔径分布和表面结构.研究结果表明,炭黑的比表面积为1.507m~2·g~(-1)(DFT),总孔容为4×10~(-3) cm~3·g~(-1).SEM图像显示炭黑颗粒由大量球状物聚集体组成,直径在4~50μm.颗粒表面孔隙高度发育,部分表面有熔融烧结特征;TEM扫描结果显示形成聚集体的颗粒直径大都在100nm左右,粒子间彼此结合,形成链枝结构的炭黑聚集体,放大到8nm可以明显看到初级粒子内部有石墨状的晶格条纹;红外光谱分析结果表明炭黑颗粒内含有大量芳香烃结构,C—H、C—O结构、芳香族及取代苯官能团广泛存在.
[Abstract]:The bright spot in the window during the gas explosion is determined to be the carbon black produced during the explosion with the characteristics of high heat radiation. The pore size distribution and surface structure of carbon black produced by explosion under gas concentration were analyzed by means of low temperature liquid nitrogen adsorption surface area analyzer, scanning electron microscope (SEM), transmission electron microscope (TEM) and Fourier transform infrared spectroscopy (FTIR). The results show that the specific surface area of carbon black is 1.507m~2 GG ~ (-1) and the total pore volume is 4 脳 10 ~ (-3) cm~3 g~(-1).SEM images show that the carbon black particles are composed of a large number of spherical aggregates with a diameter of 450 渭 m. The pore height on the surface of the particles is high, and some surfaces have melting sintering characteristics. Tem scanning results show that the diameter of the particles forming aggregates is mostly about 100nm, and the particles combine with each other to form carbon black aggregates with chain branch structure. When amplified to 8nm, graphite-like lattice stripes can be seen in the primary particles, and the infrared spectra show that the carbon black particles contain a large number of aromatics and C-H _ H _ (C-O) structures, and aromatics and substituted benzene functional groups are widely present in the carbon black particles.
【作者单位】：中国矿业大学(北京)煤炭资源与安全开采国家重点实验室;中国矿业大学(北京)资源与安全工程学院;北京理工大学爆炸科学与技术国家重点实验室;
【基金】：中央高校基本科研业务费资助项目(2009KZ03) 北京理工大学爆炸科学与技术重点实验室开放基金资助项目(KFJJ16-04M)
【分类号】：TD712.7

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