Determination of the Ortho-Para Ratio in Gaseous Hydrogen Mixtures
| Autor: | D. Zhou, Gary G. Ihas, Neil Sullivan |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Materials science
Hydrogen Instrumentation Gaseous hydrogen Analytical chemistry chemistry.chemical_element Propulsion Condensed Matter Physics Atomic and Molecular Physics and Optics Thermal conductivity chemistry Volume (thermodynamics) General Materials Science Sensitivity (electronics) Liquid hydrogen |
| Zdroj: | Journal of Low Temperature Physics. 134:401-406 |
| ISSN: | 0022-2291 |
| DOI: | 10.1023/b:jolt.0000012586.44305.a7 |
| Popis: | With the large volume uses of liquid hydrogen expected in the near future, specifically for the propulsion of space vehicles and other energy requirements, there is a need to monitor and accurately control the ortho/para ratio in gaseous samples of hydrogen. A ratiometer based on the difference in the thermal conductivity of the two molecular species of hydrogen has been constructed and tested to determine the ortho-to-para hydrogen ratio in gaseous samples. The design has sought to produce a fast, high accuracy measurement in a simple compact cell. The ratiometer and electronic readout package is described, and data demonstrating the sensitivity, stability, and speed of response of the device is also presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink