Experimental studies of hydrogen-absorbing properties of intermetallic compound LaNi4.4Fe0.3Al0. 3 for hydrogen purification

Hydrogen/methane mixtures draw attention due to the idea of the injection of hydrogen into natural gas networks and biological production of biohythane by one- and two-step anaerobic fermentation/digestion methods. It is hard to extract hydrogen from dilute mixtures with methane by traditional separ...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-12, Vol.1683 (3)
Main Authors: Blinov, D V, Bezdudny, A.A., Dunikov, D O, Kazakov, A N, Kuleshov, V N
Format: Article
Language:English
Subjects:
Absorption
Binary mixtures
Continuous flow
Fermentation
Hydrogen
Intermetallic compounds
Metal hydrides
Methane
Natural gas
Partial pressure
Physics
Porosity
Separation
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Summary:Hydrogen/methane mixtures draw attention due to the idea of the injection of hydrogen into natural gas networks and biological production of biohythane by one- and two-step anaerobic fermentation/digestion methods. It is hard to extract hydrogen from dilute mixtures with methane by traditional separation processes, since hydrogen is the minor component with low partial pressure. Metal hydrides selectively absorb hydrogen and offer an opportunity to overcome the limitations of traditional separation methods. Intermetallic alloy of lowered pressure LaNi4.4Fe0.3Al0.3 was made (obtained) to use it in the extraction of hydrogen out of a mixture of gases. Hydrogen absorption properties of alloy were investigated. PCT isotherms between 313K and 353K, porosity, average particle size, specific surface area and permeability of metal hydride bed were measured, X-ray diffraction (XRD) and SEM investigation of bed structure were implemented. Experimental study of processes during the extraction of hydrogen out of binary mixture H2-CH4 (10% vol.-90% vol.) were carried out by means of continuous-flow metal hydride reactor RSP-8, filled with 1 kg of LaNi4.4Fe0.3Al0.3. Recover ratio with the mixture pressure of 1.0 MPa stood at 70%.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1683/3/032036