Multi-channel on-line chromatographic analysis system for quick air-fuel ratio measurement

Akdogan F.

JOURNAL OF CHROMATOGRAPHY A, vol.752, pp.183-187, 1996 (SCI-Expanded) identifier identifier

  • 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.