[confusedstud]

Review
Aspects of the mechanism of the flame ionization detector
Torkil Holm
Department of Organic Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark

I was reading the above mentioned paper and they were going into why acetylene has an effective carbon number of 2.6 instead of 2.0 and they showed experimentally that it was really 2.0 under their conditions. But they didn't explain why it would be 2.6 in the normal case. Is there a known reason for this?