Temperature Dependence of the Gas-Phase Reaction HOSO2+O2->HO2+SO3

Article abstract of DOI:10.1021/j100323a021

We have measured the temperature dependence of the reaction HOSO2+O2->HO2+SO3.This reaction is a key step in the gas-phase oxidation of SO2 to H2SO4.The rate coefficient was measured in a low-pressure discharge flow reactor, by directly monitoring the loss of HOSO2 by chemical ionization mass spectrometry.The rate coefficient is k(T)=(1.34+/-0.25)x10^-12 exp<(-330+/-70)/T> cm³ molecule^-1 s^-1 for the temperature range 297 K