TY - JOUR
T1 - Electron spin resonance studies of formation of SO2- radicals on calcium oxide
AU - Ono, Yoshio
AU - Takagiwa, Hiroyuki
AU - Fukuzumi, Shun Ichi
PY - 1979
Y1 - 1979
N2 - The formation of SO2- radicals on CaO has been studied by e.s.r. spectroscopy. CaO, prepared by evacuating CaCO3 at 1173 K was exposed to sulphur dioxide at 473 K. Under these conditions, SO 2- radicals were observed at concentrations of ≈ 3 × 1017 spins g-1. The effect of the heat-treatment temperature of the starting CaCO3 and of the adsorption temperature have been examined. The SO2- radicals are stable up to 473 K, but decay with second order kinetics above 498 K. The radicals react with oxygen to form SO4- radicals at 77 K and SO 3- radicals at room temperature.
AB - The formation of SO2- radicals on CaO has been studied by e.s.r. spectroscopy. CaO, prepared by evacuating CaCO3 at 1173 K was exposed to sulphur dioxide at 473 K. Under these conditions, SO 2- radicals were observed at concentrations of ≈ 3 × 1017 spins g-1. The effect of the heat-treatment temperature of the starting CaCO3 and of the adsorption temperature have been examined. The SO2- radicals are stable up to 473 K, but decay with second order kinetics above 498 K. The radicals react with oxygen to form SO4- radicals at 77 K and SO 3- radicals at room temperature.
UR - http://www.scopus.com/inward/record.url?scp=37049103661&partnerID=8YFLogxK
U2 - 10.1039/F19797501613
DO - 10.1039/F19797501613
M3 - Article
AN - SCOPUS:37049103661
SN - 0300-9599
VL - 75
SP - 1613
EP - 1618
JO - Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
JF - Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
ER -