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Gaseous SO3 and H2SO4 in the exhaust of an aircraft gas turbine engine: measurements by CIMS and implications for fuel sulfur conversion to sulfur (VI) and conversion of SO3 to H2SO4

2003; Elsevier BV; Volume: 38; Issue: 3 Linguagem: Inglês

10.1016/j.atmosenv.2003.09.069

1873-2844

A. A. Sorokin, Eleni Katragkou, Frank Arnold, R. Busen, U. Schumann,

Catalytic Processes in Materials Science

An estimation of the conversion efficiency (e) of fuel sulfur to SO 3 and H 2 SO 4 , where e=([SO 3 ]+[H 2 SO 4 ])/[S T ] and [S T ] is the total sulfur atom concentration in the exhaust at the exit of an aircraft gas-turbine combustor, was derived from measurements by comparison with model results.The major results of the presented CIMS experiments and their interpretation with a model simulation are: (i) The efficiency is e=2.371% at an exhaust age of about 5 ms from the combustor exit; (ii) The SO 3 molecules represent a major fraction of sulfur (VI) gases e A o50% and an essential SO 3conversion to H 2 SO 4 takes place in the sampling line where the exhaust gases spend a sufficiently long time and where the temperature is lower than in the hot exhaust.The coincidence of e from our work (measurements with the sampling point in the exhaust just behind the combustor exit) and e the measurements in an exhaust at a plume age of about 1 s suggests that the sulfur (VI) formation is inefficient in the post-combustor flow inside the aircraft engine.