PHYSICOCHEMICAL EFFECTS INFLUENCING THE MEASUREMENTS OF INTERFACIAL SURFACE-TENSION OF COAL ASHES

被引：11

作者：

NOWOK, JW

BIEBER, JA

BENSON, SA

JONES, ML

机构：

[1] Combustion and Environmental Systems Research Institute, University of North Dakota, Energy and Environmental Research Center, Grand Forks, ND 58202

来源：

FUEL | 1991年 / 70卷 / 08期

关键词：

SURFACE PROPERTIES; ASH; SLAG;

D O I：

10.1016/0016-2361(91)90050-K

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The sessile drop technique has been used to determine the interfacial surface tension of Beulah, Illinois no. 6, and Pittsburgh no. 8 coal ash derived slags under various atmospheres. The physical and chemical effects that influence interfacial surface tension during heating cool slags are discussed. The results indicate that interfacial surface tension measurements obtained below the temperature of critical viscosity (T(cv)) were lower than those determined above T(cv). This effect was attributed to a non-equilibrium state of surface tension due to the random distribution of surface active phases in the slag and higher polymerization of silicate structure. The interfacial surface tensions did not vary significantly with temperatures above T(cv).

引用

页码：951 / 956

页数：6

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