煤化作用对煤微表面结构特性影响研究

doi:10.16265/j.cnki.issn1003-3033.2020.01.019

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (1): 121-127.doi: 10.16265/j.cnki.issn1003-3033.2020.01.019

煤化作用对煤微表面结构特性影响研究

刘慧芳¹, 宋大钊¹ 副教授, 何学秋^1,2 教授, 田向辉¹, 娄全², 王伟象¹

1.北京科技大学土木与资源工程学院,北京 100083;
2.中国矿业大学(北京) 煤炭资源与安全开采国家重点实验室, 北京 100083

收稿日期:2019-10-08 修回日期:2019-12-25 出版日期:2020-01-28 发布日期:2021-01-22
作者简介:刘慧芳 (1995—),女,河南周口人,硕士研究生,主要研究方向为地下工程动力灾害监测预警物理方法E-mail:liu_hfsofia@163.com。
基金资助:
国家自然科学基金重点项目资助(51634001);国家重点研发计划项目(2016YFC0801408)。

Influence of coalification on microstructure characteristics of coal surface

LIU Huifang¹, SONG Dazhao¹, HE Xueqiu^1,2, TIAN Xianghui¹, LOU Quan², WANG Weixiang¹

1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China

Received:2019-10-08 Revised:2019-12-25 Online:2020-01-28 Published:2021-01-22

摘要/Abstract

摘要： 为研究煤化作用对煤微结构特性影响,选取3种不同变质程度煤样,采用扫描电镜(SEM)研究其表面孔隙及形态分布特征;通过傅里叶红外光谱(FTIR)研究其表面官能团种类及其分布。当HP-SH煤样R₀由0.70%增大到2.88%时,表面孔隙率分布范围为65.29%～77.07%,表面孔隙趋于粗糙、复杂化;各煤样极性官能团中含氧官能团相对含量逐渐增大, -O-的相对数量比为10.1%～19.25%,-OH的相对数量比为7.16%～41.79%,-COOH的相对数量比为52.01%～51.96%;芳香度和聚合程度也逐渐增大,芳香度为1.09～1.63,聚合度为0.29～1.58,煤样芳香结构参数与表面孔隙率呈线性关系。结果表明:煤化程度增高,煤样微表面官能团种类相似;官能团结构越复杂,微表面孔隙结构也越复杂,为微表面瓦斯提供赋存环境。

关键词: 煤化作用, 扫描电镜(SEM), 傅里叶红外光谱(FTIR), 表面孔隙率, 表面官能团

Abstract: In order to study influence of coalification on microstructure characteristics of coal, with coal at three different metamorphic grades selected as samples, their surface pores and shape distribution were studied by using SEM. Then, types and distribution of surface functional groups were explored by FTIR spectrometer. When R₀ of HP-SH coal sample increased from 0.70% to 2.88%, surface pores tended to be rough and more complicated with a porosity ranging between 65.29%-77.07%. Relative content of oxygen functional groups gradually increased with an relative ratio of -O- between 10.1% -19.25%, that of -OH between 7.16%-41.79% and -COOH between 52.01%-51.96%. Aromaticity and polymerization degree also gradually increased with aromaticity ranging between 1.09-1.63 and the other 0.29-1.58, and aromatic structure parameters of coal samples kept a linear relation with surface porosity. The results show that functional groups on micro-surface of coal samples will be similar as coalification degree becomes greater. The more complex functional group structure is, the more complicated that of micro-surface pore will be, thus providing an environment for micro-surface to reserve gas.

Key words: coalification, scanning electron microscopy (SEM), Fourier transform infrared (FTIR), surface porosity, surface functional group

中图分类号:

X915.5

刘慧芳, 宋大钊, 何学秋, 田向辉, 娄全, 王伟象. 煤化作用对煤微表面结构特性影响研究[J]. 中国安全科学学报, 2020, 30(1): 121-127.

LIU Huifang, SONG Dazhao, HE Xueqiu, TIAN Xianghui, LOU Quan, WANG Weixiang. Influence of coalification on microstructure characteristics of coal surface[J]. China Safety Science Journal, 2020, 30(1): 121-127.

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煤化作用对煤微表面结构特性影响研究

Influence of coalification on microstructure characteristics of coal surface

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