Determination of Nitrous oxide in Fluegas by Gaschromatography
1980 Volume 15 Issue 2 Pages 53-55
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1980 Volume 15 Issue 2 Pages 53-55
This paper describes a method for analysis of nitrous oxide in flue gas by has chromatography.
The flow diagram for sampling is showed in Fig. 2. Interference substance in sample was removed using a trap chilled in ice bath, packing tube of Soda Lime and dehydration reagent. The sample of 150 ml was condensed in concentration tube chilled in liquid oxygen, then measured by gas chromatography. The column system and conditions were shown as follows:
Gas chromatigraph: Hitach: 063; Detector: Thermal conductivity; Column: Porapak QS, 80-100 mesh, 3 mmφ(Id), 7m (long), teflon tube; Column temp.: 100°C; Sample volume: 150 ml.
The results thus obtained were as follows:
(1) This method is easy to handle and suitable.
(2) Lower limit of quantitative determination was about 1 ppm.
(3) Coefficient of variation of replicated rund in the standard gas were in the range of 2 to 6%.
(4) This method was applied to the determination of nitrous oxide in flue gas; Nitrous oxide were tr-2 (boier gases) and 27-46 ppm (denitration exhaust gases).
