Abstract
The conversion of SO 2 into SO 3 has been studied during the slow oxidation reaction and the combustion of pentane-air-SO 2 mixtures. The SO 2/fuel ratio was 1 100 , this value corresponding to a “low-sulphur-containing” fuel. Experiments were performed in a static, isothermal chamber. It appeared that SO 2 is oxidized into SO 3 during the reaction leading to self-ignition, and partly decomposes within the flame. Then a slower decomposition reaction takes place in combustion gases. The conversion into SO 3 could reach 100% in the vicinity of maximum rate of the oxidation reaction, although it was lower at the end of the reaction. For the SO 3 formation, reactions involving intermediate products of pentane oxidation are proposed.
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