Conversion rate of para-hydrogen to ortho-hydrogen by oxygen: implications for PHIP gas storage and utilization

2013 ◽  
Vol 27 (3) ◽  
pp. 195-199 ◽  
Author(s):  
Shawn Wagner
Keyword(s):  
Conversion Rate ◽  
Gas Storage ◽  
Para Hydrogen ◽  
Ortho Hydrogen

Elementary excitations of solid ortho-hydrogen diluted with para-hydrogen

1982 ◽  
Vol 25 (11) ◽  
pp. 6655-6665 ◽  
Author(s):  
Donald Candela ◽  
W. T. Vetterling
Keyword(s):  
Para Hydrogen ◽  
Elementary Excitations ◽  
Ortho Hydrogen

Catalysts and the Process for Low-Temperature Conversion of ortho-Hydrogen to Liquid para-Hydrogen. Review Paper

2017 ◽  
Vol 17 (5) ◽  
pp. 346-358
Author(s):  
A. V. Zhuzhgov ◽  
O. P. Krivoruchko ◽  
L. A. Isupova ◽  
O. N. Martyanov ◽  
V. N. Parmon
Keyword(s):  
Low Temperature ◽  
Review Paper ◽  
Para Hydrogen ◽  
Ortho Hydrogen

Low-Temperature Conversion of ortho-Hydrogen into Liquid para-Hydrogen: Process and Catalysts. Review

2018 ◽  
Vol 10 (1) ◽  
pp. 9-19 ◽  
Author(s):  
A. V. Zhuzhgov ◽  
O. P. Krivoruchko ◽  
L. A. Isupova ◽  
O. N. Mart’yanov ◽  
V. N. Parmon
Keyword(s):  
Low Temperature ◽  
Para Hydrogen ◽  
Ortho Hydrogen

Sound absorption in hydrogen gas at 77 °K

1970 ◽  
Vol 48 (3) ◽  
pp. 303-306 ◽  
Author(s):  
H. Narayana ◽  
S. B. Woods
Keyword(s):  
Relaxation Time ◽  
Hydrogen Molecule ◽  
Rotational Transition ◽  
Hydrogen Gas ◽  
Translational Energy ◽  
Pressure Measurements ◽  
Para Hydrogen ◽  
Pulse Technique ◽  
Ortho Hydrogen ◽  
Recent Experimental Work

The absorption of sound in gaseous para-hydrogen and in two mixtures of para- and ortho-hydrogen has been measured at 77 °K by a pulse technique. The frequency was 3 MHz and, by varying the gas pressure, measurements were made at frequency/pressure ratios from 3 to 45 MHz atm−1. The absorption due to relaxation between the rotational and translational energy modes was separated from the classical absorption and the relaxation time for the rotational transition J = 0 → 2 in the para-hydrogen molecule was determined. In pure para-hydrogen the isothermal relaxation time is found to be 2.21 × 10−8 s atm, but it is found to be shorter in mixtures of para- and ortho-hydrogen. The results in pure para-hydrogen are in excellent accord with recent experimental work of others but the agreement in the para–ortho mixtures is not quite so precise.

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