Table of Contents
Journal of Thermodynamics
Volume 2012, Article ID 351968, 5 pages
Research Article

Water Desorption Process in Room Temperature Ionic Liquid-H𝟐O Mixtures: N, N-diethyl-N-methyl-N-(2-methoxyethyl) Ammonium Tetrafluoroborate

1Department of Materials Science and Engineering, National Defense Academy, Yokosuka 239-8686, Japan
2Department of Applied Chemistry, National Defense Academy, Yokosuka 239-8686, Japan

Received 5 July 2011; Accepted 7 September 2011

Academic Editor: Ramesh Gardas

Copyright © 2012 Hiroshi Abe et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A water desorption process of a mixture of room temperature ionic liquid (N, N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium tetrafluoroborate) and water was investigated via simultaneous X-ray diffraction and differential scanning calorimetry (DSC) measurements, in which relative humidity was controlled by a water vapor generator. In these measurements, H2O concentration was estimated by the peak position of the principal peak in X-ray diffraction patterns, and the thermal property associated with a mixing state was detected by a DSC thermograph. In addition, the density of the mixture was measured as a macroscopic property. In situ observations revealed that the thermally unstable mixing state in the water-rich region has an important correlation with density and thermal and structural properties.