Method of activating a palladium-silver alloy
US4222900A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1979 |
| Grant date | Sep 16, 1980 |
| Priority date | — |
| Expiry date | Jun 25, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A differential thermocouple hydrogen gas detector (10) is provided by coating one thermocouple junction (34) of a differential thermocouple pair (34, 36) with a Palladium-Silver alloy catalyst (46) and the other thermocouple junction (36) with a non-catalyst (52). Heated hydrogen gas reacts with the catalyst (46) to liberate heat to the catalyst coated thermocouple junction (34) in proportion to the concentration of hydrogen gas and proportionally raise the temperature of the catalyst coated junction (34) above that of the non-catalyst coated junction (36). The output signal (44) from the differential thermocouple device (34, 36) thus provides an output signal indicative of the concentration of hydrogen gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.