摘要
利用高分辨率透射电子显微镜(HRTEM)分析了三种不同变质程度煤样的结构特征。基于傅里叶-反傅里叶变换方法,并结合Matlab、Arcgis和Auto CAD软件,通过图像分析技术,获得了HRTEM照片的晶格条纹参数。结果表明,三种煤样的晶格条纹呈现不同特征,按条纹长度分别归属于1×1-8×8共计八个类型。以3×3为临界点,在1×1和2×2中,ML-8中芳香层片的比例高于DP-4和XM-3;在3×3-8×8中,ML-8中芳香层片的比例低于DP-4和XM-3。对比HRTEM和XRD参数d002发现,随着镜质组反射率的增加d002都呈现递减趋势。
The structural characteristics of 3 coals with different metamorphic degrees were analyzed using highresolution transmission electron microscopy（ HRTEM）. Applying FFT-IFFT method, in association with Matlab,Arcgis and Auto CAD softwares,the lattice fringe parameters obtained from HRTEMimage were determined using image analysis. The results indicate that the lattice fringes of all the test coal samples exhibit different characteristics. These lattice fringes can be divided into 8 types（ 1×1-8×8 aromatic fringes） according to the fringe length distribution. Taking the 3 × 3 aromatic fringe as critical point,the sample ML-8 abundant in1×1 and 2×2 aromatic fringes while short of 3×3-8×8 aromatic fringes when comparing with sample DP-4 and sample XM-3. The values of d002 obtained from both HRTEMand XRD showa decreasing trend with increasing vitrinite reflectance.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2016年第3期279-286,共8页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(41302127
41402137)
山西省煤基重点科技攻关项目(MQ2014-01)资助~~
关键词
不同变质程度煤
高分辨率透射电子显微镜
图像分析
different metamorphic degree of coal
high resolution transmission electron microscopy
image analysis
