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Title: Method and device for the determination of low concentrations of oxygen in carbonaceous materials

Abstract

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 readioactive isotope of nickel, to form nickel tetracarbonyl (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.sup.63 (CO).sub.4 is destroyed by exposing it to high temperatures. The Ni.sup.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.

Inventors:
 [1]
  1. (Jefferson Boro, PA)
Issue Date:
Research Org.:
Pittsburgh Energy Technology Center
OSTI Identifier:
868434
Patent Number(s):
5139958
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; device; determination; concentrations; oxygen; carbonaceous; materials; converted; carbon; monoxide; pyrolyzing; material; stream; oxygen-free; helium; reacted; 63; readioactive; isotope; nickel; form; tetracarbonyl; carried; flow-through; gas; proportional; counter; quantity; determined; radioactivity; measured; exiting; flow; destroyed; exposing; temperatures; retained; apparatus; flushed; oxidized; dioxide; detection; limit; estimated; billion; 10; mg; sample; proportional counter; carbonaceous materials; carbon dioxide; carbon monoxide; carbonaceous material; nickel tetracarbonyl; detection limit; /436/422/

Citation Formats

Schultz, Hyman. Method and device for the determination of low concentrations of oxygen in carbonaceous materials. United States: N. p., 1992. Web.
Schultz, Hyman. Method and device for the determination of low concentrations of oxygen in carbonaceous materials. United States.
Schultz, Hyman. Wed . "Method and device for the determination of low concentrations of oxygen in carbonaceous materials". United States. https://www.osti.gov/servlets/purl/868434.
@article{osti_868434,
title = {Method and device for the determination of low concentrations of oxygen in carbonaceous materials},
author = {Schultz, Hyman},
abstractNote = {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 readioactive isotope of nickel, to form nickel tetracarbonyl (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.sup.63 (CO).sub.4 is destroyed by exposing it to high temperatures. The Ni.sup.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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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