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

Akdogan F.

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

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 752
  • Basım Tarihi: 1996
  • Doi Numarası: 10.1016/s0021-9673(96)00462-1
  • Dergi Adı: JOURNAL OF CHROMATOGRAPHY A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.183-187
  • Anahtar Kelimeler: air-fuel ratio, carbon dioxide, nitrogen
  • Dokuz Eylül Üniversitesi Adresli: Hayır

Özet

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.