Atmospheric chemistry of 3-methoxy-1-propanol and 3-methoxy-1-butanol: Kinetics with OH radicals and Cl atoms, identification of the end-products in the presence of NO, mechanisms and atmospheric implications

BARRERA, JAVIER A.; GARAVAGNO, MARÍA DE LOS A.; DALMASSO, PABLO R.; TACCONE, RAÚL A.

ATMOSPHERIC ENVIRONMENT

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2019 p. 28 - 28

1352-2310

he rate coefficients for the reactions of OH radicals and Cl atoms with 3-methoxy-1-propanol (3-M-1-POL) and 3-methoxy-1-butanol (3-M-1-BOL) in the gas-phase have been measured at (298 ± 2) K and atmospheric pressure. A conventional relative-rate technique was used to determine the rate coefficients: k1 (OH + 3-M-1-POL)= (2.15 ± 0.28) x 10−11 , k2 (OH + 3-M-1-BOL)= (2.38 ± 0.31) x 10−11 , k3 (Cl + 3-M-1-POL)= (2.66 ± 0.23) x 10−10 and k4 (Cl + 3-M-1-BOL)= (2.95 ± 0.27) x 10−10 , all in units of cm3 molecule−1 s−1 . The present work provides the first kinetic study of the reactions of Cl atoms with 3-M-1-POL and 3-M-1-BOL, and of the reaction of OH radicals with 3-M-1-POL. The kinetic results are presented and compared with those calculated (k SAR ) using the structure-reactivity relationship (SAR) method, and reactivity trends are discussed. Additionally, products identification under atmospheric conditions was performed for the first time for the r