An FT-IR study of the effect of simulated solar radiation and various particulates on the oxidation of SO/sub 2/

Journal Article · Sun Jan 01 00:00:00 EST 1989 · Appl. Spectrosc.; (United States)

DOI:https://doi.org/10.1366/0003702894201798· OSTI ID:6248943

Smith, D M; Keifer, J R; Novicky, M; Chughtai, A R

Short- and long-term studies of the effect of black carbon and otherparticulates on the oxidation of SO/sub 2/, with an without the presence ofoxygen, water vapor, and simulated solar radiation, have been carriedout. FT-IR studies involving isotopic oxygen-18, sulfur dioxide-18, and D/sub 2/Oin these reactions confirm the requirement of water vapor and oxygen forthis oxidation. Such experiments conducted at 298 K demonstrate only theformation of ionic sulfates, while the reactions conducted under simulatedsolar radiation show the formation of both covalent and ionic sulfate species.These observations have implications for the retention or diminution ofcatalytic activity by the soot. The reaction vessel walls, SiO/sub 2/, andparticulate black carbon, all act as catalysts for the conversion ofS(IV) to S(VI), the amounts depending primarily on the surface area of thesolid.

• Research Organization: Department of Chemistry, University of Denver, Denver, Colorado 80208(US)
• OSTI ID: 6248943
• Journal Information: Appl. Spectrosc.; (United States), Vol. 43:1
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ATMOSPHERIC CHEMISTRY
SILICATES
OXIDATION
CARBON ADDITIONS
CATALYSIS
CHEMICAL COMPOSITION
ENERGY SPECTRA
HIGH TEMPERATURE
SIMULATION
SPECTROSCOPY
SULFATES
ALLOYS
CHEMICAL REACTIONS
CHEMISTRY
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SPECTRA
SULFUR COMPOUNDS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)