The oxidation of hydrogen cyanide in fuel-rich flames

✍ Scribed by B.S. Haynes

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 557 KB
• Volume: 28
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(77)90017-7

✦ Synopsis

Over the temperature range 1950 to 2380 K, the rate constants k(12, ) --(2.0 -+ 0.2) X 108 m3/kgmolesec and k(is) = (5.6 +-0.7) × 1010 m3/kgmole-sec have been obtained. The relative contributions of reactions (12') and ( 15) vary markedly with'temperature, with reaction (15) dominating at temperatures above 2300 K. It is proposed that rupture of the OC-N linkage in the products of reactions (12') and ( 15) may then give rise to amine (N-H) species which are the measured products of HCN decay: +H HOCN --* HNCO --, NH 2 + CO, OCN+H ~ NH +CO. No evidence for any HCN-removing reactions involving CO2, NO or NH a has been obtained. while the appearance of HCN in unseeded flames may be due to reactions such as (3) [10] : CH + N 2 ~ HCN + N.

(3)

Given that HCN does occur in the appropriate post-flame gases, the purpose of this paper is to