Experimental and numerical studies of sulfur chemistry in flames

Thesis/Dissertation · Tue Dec 31 23:00:00 EST 1985

OSTI ID:6906800

Zachariah, M R

The primary effort in this study has been to probe the structure of rich H/sub 2//O/sub 2/ flames doped with SO/sub 2/. Both experimental studies and numerical simulations have been conducted in order to clarify the salient features of sulfur laden flames. All studies were conducted in low-pressure (100-150 Torr) premixed laminar flat flames. Concentration measurements were by molecular-beam mass-spectrometer sampling. Species measurements have been made for (H/sub 2/, O/sub 2/, H/sub 2/O, H, OH, O, H/sub 2/O/sub 2/, H/sub 2/S, SH, S/sub 2/, SO, SO/sub 2/, S/sub 2/O, HSO/sub 2/, HSO/sub 3/). Temperature was measured with coated Pt/Pt-10% Rh thermocouples. SO/sub 2/ was found to be the dominant sulfur species even in the very rich flames, even through H/sub 2/S is by far the most thermodynamically favored species. SO is rapidly formed in the main reaction zone; however it surprisingly never achieves partial equilibrium with SO/sub 2/, as has previously been surmised. S/sub 2/ is formed as the second most dominant sulfur species and is also found to be out of partial equilibrium. Essentially, the results suggest that a partial equilibrium description is inappropriate for these flames. In an effort to interpret the results, numerical simulations of flames have been conducted. A chemical kinetic mechanism containing sixteen species and forty four chemical reactions is prepared.

• Research Organization: California Univ., Los Angeles (USA)
• OSTI ID: 6906800
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
DOPED MATERIALS
ELEMENTS
FLAMES
HYDROGEN
KINETICS
MATERIALS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
REACTION KINETICS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES