Investigation of changes in surface properties of bituminous coal during natural weathering processes by XPS and SEM

被引：169
|
作者：
Xia, Wencheng [1 ]
Yang, Jianguo [1 ]
Liang, Chuan [1 ]
机构：
[1] China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Jiangsu, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2014年 / 293卷
基金：
中国国家自然科学基金;
关键词：
Bituminous coal; Surface properties; Weathering processes; XPS; SEM; LOW-TEMPERATURE OXIDATION; FLOTATION; OXYGEN; RANK; HYDROPHOBICITY; FLOATABILITY; CARBON;
D O I：
10.1016/j.apsusc.2013.12.151
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this investigation, XPS and SEM were used to indicate the changes in surface properties of bituminous coal during natural weathering processes. Natural weathering processes of bituminous coal were conducted on the roof. XPS results showed that the content of C C and C H groups on bituminous coal surface decreased but the content of C-0, C=0, and 0=C-0 groups increased after natural weathering processes. Meanwhile, the contents of Al and Si elements on bituminous coal surface were also increased. SEM results showed that the surface roughness of bituminous coal was increased after natural weathering processes. Natural weathering processes not only changed surface chemical composition of bituminous coal but also changed surface topography of bituminous coal. In addition, natural weathering processes made bituminous coal surface more hydrophilic. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：293 / 298
页数：6
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