Rate constant measurement for the reactions of OH and Cl with peroxyacetyl nitrate at 298 K期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Rate constant measurement for the reactions of OH and Cl with peroxyacetyl nitrate at 298 K

Authors:	N. Tsalkani A. Mellouki G. Poulet G. Toupance G. Le Bras

Affiliation:	(1) Laboratoire de Physico-Chimie de l'Environnement, Université de Paris Val de Marne, 94010 Creteil Cédex, France;(2) Centre de Recherches sur la Chimie de la Combustion et des Hautes Températures, CNRS, 45071 Orléans Cédex 2, France

Abstract:	The gas phase reactions of peroxyacetyl nitrate (PAN) with OH and Cl have been studied using the discharge-flow EPR method. The rate constants are found to be k₃=(7.5±1.4)×10^-14 and k₄=(3.7±1.7)×10^-13 cm³ molecule^-1 s^-1 at 298 K, respectively. These results confirm that the OH+PAN reaction will be the dominant sink of PAN in the middle and upper troposphere, whereas the reaction Cl+PAN will be negligible in contrast with previous estimations.

Keywords:	Reaction kinetics discharge flow rate constant PAN OH Cl
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