The effect of temperature on formaldehyde photooxidation in oxygen‐lean atmospheres | Zendy

Carmely Yaakov | Zendy; Horowitz Abraham | Zendy

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The effect of temperature on formaldehyde photooxidation in oxygen‐lean atmospheres

Author(s) -

Carmely Yaakov,

Horowitz Abraham

Publication year - 1984

Publication title -

international journal of chemical kinetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 68

eISSN - 1097-4601

pISSN - 0538-8066

DOI - 10.1002/kin.550161212

Subject(s) - chemistry , formaldehyde , oxygen , atmospheric temperature range , kinetics , reaction rate constant , medicinal chemistry , photochemistry , organic chemistry , thermodynamics , physics , quantum mechanics

The photooxidation of formaldehyde in CH 2 OO 2 , oxygen‐lean mixtures was studied in the temperature range 298–378 K. H 2 and CO formation and the loss of O 2 proceed by a chain mechanism, which between 328 and 378 K follows the previously suggested kinetics [1] with one modification. The reaction HO 2 + CH 2 O ⇄ HO 2 CH 2 O (5) is now assumed to be reversible and Δ H 5 °is estimated to be between 14 and 19 kcal/mol. The relative yields of the chain formed H 2 and CO and of the consumed O 2 remained constant over the entire temperature range indicating that the relative efficiencies of the HO reactions: HO + CH 2 O → H 2 O HCO† (7), HO + CH 2 O → H 2 O + HCO (8) and HO + CH 2 O → HOCH 2 O (9) are temperature independent.

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