Multi-channel on-line chromatographic analysis system for quick air-fuel ratio measurement
JOURNAL OF CHROMATOGRAPHY A, vol.752, pp.183-187, 1996 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 752
- Publication Date: 1996
- Doi Number: 10.1016/s0021-9673(96)00462-1
- Journal Name: JOURNAL OF CHROMATOGRAPHY A
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.183-187
- Keywords: air-fuel ratio, carbon dioxide, nitrogen
- Dokuz Eylül University Affiliated: No
Abstract
Details of the design and construction of a two-channel air-fuel ratio (AFR) chromatograph for the on-line analysis of a single sample of wet combustion gases are given. A thermal conductivity detector (TCD) is used to detect CO2 and N-2 components, which are separated on a single column system. Then the ratio of the concentration of CO2 and N-2 is used to determine the AFR in the original sample. The column used is a stainless-steel tube (3 in. X1/8 in. I.D.) filled with 80 mesh Porapak Q. A switching valve is incorporated to divert the samples between the separating column. The instrument is fully automatic and capable of determining two different AFR measurements in a working time of less than 5 s. It can operate satisfactorily at mixture strengths that are well above stoichiometric levels.