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Study on the Water in Lignite by DSC

Authors :
Li You
Zhang Shouyu
Zhao Menghao
Mao Qing
Yao Yunlong
Yang Jingning
Source :
MATEC Web of Conferences, Vol 100, p 02005 (2017)
Publication Year :
2017
Publisher :
EDP Sciences, 2017.

Abstract

As pointed out in several previous works, new drying technologies must be developed to ensure lignite remained competitive. In order to design and test them, it was needed to have a better understanding of the characters of water in lignite. Using differential scanning calorimetry (DSC), three types of the water storing in the lignite were determined from congelation character. The contents of the free water and bound water were experimentally measured from their heats of congelation, respectively. The results shows that the congelation temperature and the freezing heat per weight unit of the bound water vary in different types of lignite. It is deduced that the bound water in lignite can reflect the character of lignite. Besides, the total water content of free water and bound water is less than that measured by fully drying at 105°C. Therefore, it is deduced that there is a kind of water not frozen in the lignite, possibly because its molecular cluster is too small.

Details

Language :
English, French
ISSN :
2261236X
Volume :
100
Database :
Directory of Open Access Journals
Journal :
MATEC Web of Conferences
Publication Type :
Academic Journal
Accession number :
edsdoj.94773d4511354dbdace58d9c17a28106
Document Type :
article
Full Text :
https://doi.org/10.1051/matecconf/201710002005