- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Kinetics and Mechanism of Hydrogen Sorption in Yttrium-Silicon D88- Structure Phases, Part I | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 36, 2014, Pages 667-679 | ||
| Authors | ||
| Jabbar S.Hadi; Tahseen A. Alsalim; M. Y. Shareef; I. J. McColm; Mouaid A. Hassen | ||
| Abstract | ||
| Abstract A relationship between the size of the z-axis lattice parameter and the rate of hydrogenation of D88 phases has been established. Materials with c-axis in the range 0.632-0.642 nm are most resistant to hydrogen content increase whilst maintaining a fast sorption capability for 0.9-10 H (fu)-1. From this Y5Si2Ge and Y5Si2GeN0.1 have been prepared and used to establish the hydrogen sorption kinetics at a range of temperatures and pressures of hydrogen. The effect that nitrogen has on the alloy is to increase reaction rates by a factor of approximately 3. Thermogravimetric plots were first analysed by the J-M-A equation as used by Goudy (6). Arrhenius representation of the first and second order equations indicate a significant change in reaction mechanism at 740-745 K. Activation energies are in the range 84-166 kJ (mol)-1 depending on order and temperature. | ||
| Keywords | ||
| Hydrogen storage material; Interstitial alloys; Gas; solid reactions; Kinetics; thermal analysis | ||
|
Statistics Article View: 41 PDF Download: 20 |
||