A comparison of adsorption isotherms using different techniques for a range of raw, water- and acid-washed lignites

被引：23

作者：

Fei, Yi

Marshall, Marc

Jackson, W. Roy

Chaffee, Alan L.

Allardice, David J.

机构：

[1] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[2] Cooperat Res Ctr Clean Power Lignite, Mulgrave, Vic 3170, Australia

[3] Allardice Consulting, Vermont, Vic 3133, Australia

来源：

FUEL | 2006年 / 85卷 / 10-11期

关键词：

lignites; water adsorption; comparison of measurement techniques; carboxylic (stronger acid) functional groups; phenolic (weaker acid) functional groups;

D O I：

10.1016/j.fuel.2005.12.017

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 [动力工程及工程热物理]; 0820 [石油与天然气工程];

摘要：

Adsorption isotherms based on desiccator measurements at 30 degrees C have been constructed for six Victorian lignites (five raw, one water-washed and six acid-washed samples). The results for a selection of samples have been shown to be in good agreement with more detailed isotherms obtained using two different automated microbalances. This suggests that the rate of approach to the final relative vapor pressure has little effect. The equilibrium moisture contents at 51.4% relative vapor pressure or less for the acid-washed lignite samples showed moderately good correlations (R-2 similar to 0.5) with the carboxylic acid concentration, but much weaker correlations with the phenolic content. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1559 / 1565

页数：7

共 20 条

[1]

The characterisation of different forms of water in low rank coals and some hydrothermally dried products [J].