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    Modified chemiluminescent NO analyzer accurately measures NOX (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Installation of molybdenum nitric oxide (NO)-to-higher oxides of nitrogen (NOx) converter in chemiluminescent gas analyzer and use of air purge allow accurate measurements of NOx in exhaust gases containing as much as thirty percent carbon monoxide (CO). Measurements using conventional analyzer are highly inaccurate for NOx if as little as five percent CO is present. In modified analyzer, molybdenum has high tolerance to CO, and air purge substantially quenches NOx destruction. In test, modified chemiluminescent analyzer accurately measured NO and NOx concentrations for over 4 months with no denegration in performance.
    Keywords: MATERIALS
    Type: LEW-12850 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 54
    Format: text
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    NASA TECHNICAL REPORTS
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