Thermodynamic Properties of Hydrogen + Tetra-n-Butyl Ammonium Bromide Semi-Clathrate Hydrate. (9th November 2009)

• Record Type: Journal Article
• Authors: Hashimoto, Shunsuke; Tsuda, Takaaki; Ogata, Kyohei; Sugahara, Takeshi; Inoue, Yoshiro; Ohgaki, Kazunari
• Other Names: Lee Jae Academic Editor.
• Is Part Of: Journal of thermodynamics. Volume 2010(2010)
• Publication Date: 2009-11-09
• Subjects: Thermodynamics -- Periodicals; Thermodynamics; Periodicals; Electronic journals; 536.7
• DOI: 10.1155/2010/170819
• Languages: English
• ISSNs: 1687-9244

Abstract

Abstract : Thermodynamic stability and hydrogen occupancy on the hydrogen + tetra-n -butyl ammonium bromide semi-clathrate hydrate were investigated by means of Raman spectroscopic and phase equilibrium measurements under the three-phase equilibrium condition. The structure of mixed gas hydrates changes from tetragonal to another structure around 95 MPa and 292 K depending on surrounding hydrogen fugacity. The occupied amount of hydrogen in the semi-clathrate hydrate increases significantly associated with the structural transition. Tetra-n -butyl ammonium bromide semi-clathrate hydrates can absorb hydrogen molecules by a pressure-swing without destroying the hydrogen bonds of hydrate cages at 15 MPa or over.