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Mechanism of the chain process forming H 2 in the photooxidation of formaldehyde
Author(s) -
Veyret Bernard,
Roussel Pascal,
Lesclaux Robert
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.550161213
Subject(s) - chemistry , formaldehyde , dissociation (chemistry) , photodissociation , kinetic energy , photochemistry , activation energy , reaction mechanism , hydrogen , chain propagation , chain reaction , chain termination , catalysis , organic chemistry , physics , polymer , monomer , quantum mechanics , radical polymerization , copolymer
A mechanism for the formation in a chain of H 2 , CO, and HCOOH in the photooxidation of formaldehyde is proposed. This mechanism is initiated by the addition of HO 2 to formaldehyde. Hydrogen atoms are produced by the thermal dissociation of the HOCH 2 O radical: HOCH 2 O → H + HCOOH; Δ H = + 3.2 kcal/mol [5]. Photolysis of CH 2 OO 2 NO mixtures and product analysis were carried out in conjunction with kinetic simulation yielding an estimate for the activation energy of the dissociation reaction : E 5 = 14.9 ± 1.0 kcal/mol. Previous observations of this chain process are considered in view of this mechanism.