Method and apparatus for determining ammonia concentration of gas
US3977836A · kind A · utility
23Cited by
4References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 12, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Nov 12, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/177692
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ammonia gas to be determined, and an oxidative gas containing nitrogen oxides in moles more than those of the ammonia are brought into contact with an analytical catalyst capable of forming nitrogen and water from ammonia and nitrogen oxides. Concentrations of nitrogen oxides of the gas before and after the contact with the analytical catalyst are determined, and an ammonia concentration of the gas is determined by converting the difference between the concentrations of nitrogen oxides to the ammonia concentration by calculation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.