构造煤甲烷吸附表面能研究.pdf

第42卷第1期
媟地质与勘探
Vol 42 No.1
2014年2月
COAL GEOLOGY&XPLORAINON
Feb.2014
文章编号:1001-1986(2014)01-0031-04
构造煤甲烷吸附表面能研究
张玉责,赫少攀,高然超
(河南理工大学安全科学与工程学院,河南焦作454000)
摘要:煤的表面能是致使煤具有吸附性羞异的根本原因。通过分析动力变质作用对构造煤结构和
组分的影响,借助甲烷等溋吸附实验,计算了不同温度下随着压力増大,原生结构煤和构造煤吸
附甲烷的煤表面能的变化情况,并从构造煤动力变质角度分析了其表面能变化的原因。结果表明
动力变质作用对构造煤结构和组分改造作用明显,构造煤比共生的原生结构煤微孔隙更发育,吸
附能力更强;计算结果也表明,随着温度的升高和压力的増大,构造煤吸附甲烷的表面能降低值
均大于共生的原生结构烘,构造煤吸附甲烷的能力更强
关键词:构造煤;动力变质作用;甲烷吸附表面能
中图分类号:P618.13文献标识码
DOI:10.39691isn.1001-1986.2014.01.007
The surface energy of methane adsorption of tectonic coal
JIAN Kuo, ZHANG Yugui, HE Shaopan, GAO Ranchao
(Schoo o/Safely Science and ngineering, Enan Polylechmic University, izo 454000, China)
Abstract: The fundamental reason of coal adsorption difference is coal surface energy. In this paper, the effect
which is from dynamic metamorphism on tectonic coal struclurc and componcnts was analyzed. In the process of
adsorption of methane, using methane adsorption isotherm experiments, we calculated the surtace energy change of
rimary structure coal and tectonic coal at different temperatures, and causes of surface energy change of tectonic
coal were analyed from the perspcetive of dynamic metamorphism. Ihe results show that the trans formable cffcct
which is From dynamic metamorphism on structure and components of tectonic coal is obvious, the micro pores
structure of tectonic coal is more developed than symbiotic primary structure coal, and the tectonic coal has
stronger adsorption capacity. The calculation results also show that, both the lower value of surface energy and ad-
sorption methane capacity of tectonic coal are larger than symbiotic primary structure coal with the Increase of
temperature and pressure
Key words: tectonic coal; dynamic metamorphism; the surface energy of methane adsorption
关于媟表面能的研究在国内外较少报导,由中国
科学院地质研究所的吴俊、何学秋等虽初步计算了
样品与实验
煤表面能?,但却未从微观角度深入分析媒表面
样品
能。煤作为孔隙极为发育的物质研究已久,已证实
原生结构煤和构造煤的对比煤样采自平顶山矿
构造媟变质程度比共生的原生结构煤高一些,但是
区平煤五矿已16-17煤层,煤种为肥煤。煤质特征如
煤表面的吸附机理和表面性质尚不清楚。本文通
表1所示。
过用甲烷等温吸附试验获得数据,据此来计算原生
表1煤样的工业分析
结构煤和构造煤的表面能降低值,并从动力变质作
Table 1 Proximate analysis of coal samples
用角度探讨构造媟表面能的变化规律,最后将两者
煤柞编号煤体类型
M
Faaf o
结合起来,共同研究原生结构煤和构造煤各自的吸
原生结构艓
4.45
附性能。
构造媟
1.80
5.50
27.51
收稿日期:2012-11-08
基金项目:国家科技重大专项课题(2011/、XO5040-005);国家自然科学基金项目(41102094)
作者简介:简阔(1986-)男,河南信阳人,硕士,研究方向为瓦斯地质理论与技术