Cyanuric acid + nitric oxide reaction at 700 sup 0 C and the effects of oxygen

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Combustion and Flame; (USA)

DOI:https://doi.org/10.1016/0010-2180(89)90129-6· OSTI ID:5297784

Wicke, B G; Grady, K A; Ratcliffe, J W ^[1]

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1. Physical Chemistry Dept., General Motors Research Labs., Warren, MI (US)

The reaction of cyanuric acid, (HNCO)/sub 3/, with nitric oxide has been examined in a flow tube under conditions similar to those initially reported for RAPRENO/sub chi/. Surface interactions are shown to play an important role in the observed chemistry. In a quartz flow tube at 700{sup 0}C, (HNCO)/sub 3/ decomposes slowly; addition of nitric oxide does not affect the (HNCO)/sub 3/ decomposition, and no NO reduction occurs. In an otherwise equivalent stainless-steel flow system, (HNCO)/sub 3/ decomposes rapidly to H/sub 2/, CO, and N/sub 2/ at 700{sup 0}C. In this stainless-steel flow tube, NO is efficiently reduced to N/sub 2/ by (HNCO)/sub 3/. At 700{sup 0}C, the stoichiometry of this fast chemistry is 2(HNCO)/sub 3/ + 9 NO{yields}3 H/sub 2/O + 7.5 N/sub 2/ + 6 CO/sub 2/. O/sub 2/ also reacts rapidly with (HNCO)/sub 3/ vapor at 700{sup 0}C in stainless steel. The dominant nitrogen-containing product of this reaction is NO. This reaction of (HNCO)/sub 3/ vapor with O/sub 2/ is faster than the corresponding reaction with NO. Under conditions examined here in stainless steel, reduction of NO by (HNCO)/sub 3/ in the presence of O/sub 2/ occurs only after the O/sub 2/ is consumed.

• OSTI ID: 5297784
• Journal Information: Combustion and Flame; (USA), Journal Name: Combustion and Flame; (USA) Vol. 78:2; ISSN CBFMA; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALLOYS
AZINES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CYANURATES
ELEMENTS
HETEROCYCLIC COMPOUNDS
HIGH ALLOY STEELS
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
NITRIC OXIDE
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
REACTION KINETICS
STAINLESS STEELS
STEELS
STOICHIOMETRY
TRIAZINES