A device for the determination of low concentrations of oxygen in carbonaceous materials
Oxygen in carbonaceous materials is converted to carbon monoxide (CO) by pyrolyzing the material in a stream of oxygen-free helium. The CO is reacted with Ni{sup 63}, a radioactive isotope of nickel, to form nickel tetracarbanyl (Ni{sup 63}(CO){sub 4}) which is carried by the helium stream into a flow-through gas proportional counter. The quantity of Ni(CO){sub 4} is determined by the radioactivity of the gas as measured by the gas proportional counter. After exiting the flow through counter the Ni{sub 63}(CO){sub 4} is destroyed by exposing it to high temperatures. The Ni{sub 63} is retained within the apparatus while the CO is flushed from the system after being oxidized to carbon dioxide (CO{sub 2}). The detection limit is estimated to be less than 1 part per billion oxygen for a 10 mg sample.
- Research Organization:
- USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A7765079
- Application Number:
- ON: DE94003052; PAN: 7-765,079
- OSTI ID:
- 140164
- Resource Relation:
- Other Information: PBD: 1991
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method and device for the determination of low concentrations of oxygen in carbonaceous materials
Combined coal gasifier and fuel cell system and method