Investigation of Hydrogen Absorption Kinetics on Intermetallic Compounds Hf2ni, Hf2co and Hf2fe
Abstract
Polycrystalline intermetallics Hf2Ni, Hf2Co and Hf2Fe are investigated as the hydrogen absorbers in the temperature range 348 to 823 K, under the constant hydrogen pressure of 1 bar. The absorption process was carried out in typical volumetric apparatus and H/M mole ratios together with rate constants and activation energies for hydrogen absorption reaction were determined. Achieved hydrogen absorption capacities at 573 K are: 0.60, 0.90 and 1.48 and rate constants at 573 K are: 0.38 x 10(-3), 0.55 x 10(-3) and 4.72 x 10(-3) s(-1) for Hf2Ni, Hf2Co and Hf2Fe respectively. Determined activation energies are: for Hf2Ni, 38.44 kJ/mol, for Hf2Co, 19.62 kJ/mol and 2.74 kJ/mol for Hf2Fe. From the obtained experimental results, it was concluded that Hf2Fe has the best hydrogen absorption ability among the examined intermetallics.
Keywords:
Hf / Intermetallics / Activation energy / Rate constant / Hydriding capacity / Hydriding isothermSource:
Hemijska industrija, 2009, 63, 3, 159-162Note:
- 7th Seminar of Young Researchers, Dec 22-24, 2008, Belgrade, Serbia
DOI: 10.2298/HEMIND0903159K
ISSN: 0367-598X
WoS: 000272436600004
Scopus: 2-s2.0-77952945515
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VinčaTY - JOUR AU - Kumrić, Sandra V. AU - Stojić, Dragica Lj. AU - Cekić, Božidar Đ. PY - 2009 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6853 AB - Polycrystalline intermetallics Hf2Ni, Hf2Co and Hf2Fe are investigated as the hydrogen absorbers in the temperature range 348 to 823 K, under the constant hydrogen pressure of 1 bar. The absorption process was carried out in typical volumetric apparatus and H/M mole ratios together with rate constants and activation energies for hydrogen absorption reaction were determined. Achieved hydrogen absorption capacities at 573 K are: 0.60, 0.90 and 1.48 and rate constants at 573 K are: 0.38 x 10(-3), 0.55 x 10(-3) and 4.72 x 10(-3) s(-1) for Hf2Ni, Hf2Co and Hf2Fe respectively. Determined activation energies are: for Hf2Ni, 38.44 kJ/mol, for Hf2Co, 19.62 kJ/mol and 2.74 kJ/mol for Hf2Fe. From the obtained experimental results, it was concluded that Hf2Fe has the best hydrogen absorption ability among the examined intermetallics. T2 - Hemijska industrija T1 - Investigation of Hydrogen Absorption Kinetics on Intermetallic Compounds Hf2ni, Hf2co and Hf2fe VL - 63 IS - 3 SP - 159 EP - 162 DO - 10.2298/HEMIND0903159K ER -
@article{ author = "Kumrić, Sandra V. and Stojić, Dragica Lj. and Cekić, Božidar Đ.", year = "2009", abstract = "Polycrystalline intermetallics Hf2Ni, Hf2Co and Hf2Fe are investigated as the hydrogen absorbers in the temperature range 348 to 823 K, under the constant hydrogen pressure of 1 bar. The absorption process was carried out in typical volumetric apparatus and H/M mole ratios together with rate constants and activation energies for hydrogen absorption reaction were determined. Achieved hydrogen absorption capacities at 573 K are: 0.60, 0.90 and 1.48 and rate constants at 573 K are: 0.38 x 10(-3), 0.55 x 10(-3) and 4.72 x 10(-3) s(-1) for Hf2Ni, Hf2Co and Hf2Fe respectively. Determined activation energies are: for Hf2Ni, 38.44 kJ/mol, for Hf2Co, 19.62 kJ/mol and 2.74 kJ/mol for Hf2Fe. From the obtained experimental results, it was concluded that Hf2Fe has the best hydrogen absorption ability among the examined intermetallics.", journal = "Hemijska industrija", title = "Investigation of Hydrogen Absorption Kinetics on Intermetallic Compounds Hf2ni, Hf2co and Hf2fe", volume = "63", number = "3", pages = "159-162", doi = "10.2298/HEMIND0903159K" }
Kumrić, S. V., Stojić, D. Lj.,& Cekić, B. Đ.. (2009). Investigation of Hydrogen Absorption Kinetics on Intermetallic Compounds Hf2ni, Hf2co and Hf2fe. in Hemijska industrija, 63(3), 159-162. https://doi.org/10.2298/HEMIND0903159K
Kumrić SV, Stojić DL, Cekić BĐ. Investigation of Hydrogen Absorption Kinetics on Intermetallic Compounds Hf2ni, Hf2co and Hf2fe. in Hemijska industrija. 2009;63(3):159-162. doi:10.2298/HEMIND0903159K .
Kumrić, Sandra V., Stojić, Dragica Lj., Cekić, Božidar Đ., "Investigation of Hydrogen Absorption Kinetics on Intermetallic Compounds Hf2ni, Hf2co and Hf2fe" in Hemijska industrija, 63, no. 3 (2009):159-162, https://doi.org/10.2298/HEMIND0903159K . .