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Structure and reactivity of adsorbed oxides of sulfur

Technical Report ·
DOI:https://doi.org/10.2172/7283069· OSTI ID:7283069
The structure and reactivity of adsorbed oxides of sulfur and other small sulfur-containing molecules were studied. The molecules studied include the anion radicals of SO/sub 2/, SO/sub 3/, a triatomic sulfur species, and carbonyl sulfide. Diamagnetic sulfite and sulfate ions, as well as covalently bonded oxides of sulfur, were also studied. The adsorbent was a high surface area magnesium oxide powder. Electron paramagnetic resonance and infrared spectroscopy were used to characterize the surface species. The results show that electronegative molecules such as SO/sub 2/ adsorb either by an electron transfer from the solid, forming a negative radical ion, or by reacting with the oxide ions of the lattice. At room temperature the adsorbed SO/sub 2/ anion radical may be oxidized with molecular oxygen to the SO/sub 3/ anion radical; whereas, at elevated temperatures the sulfite ions may be oxidized. In contrast, the anion radical of carbonyl sulfide is very unstable and dissociates, presumably to elemental S and Co, at low temperatures. Elemental S reacts with partially hydroxylated magnesium oxide, forming the triatomic negative ion, H/sub 2/S, and other unidentified products. (auth)
Research Organization:
Texas A and M Univ., College Station (USA). Dept. of Chemistry
OSTI ID:
7283069
Report Number(s):
EPA-650/3-74-006
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
CARBONYLS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
ELECTRON SPIN RESONANCE
INFRARED SPECTRA
KINETICS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
RESONANCE
SORPTION
SORPTIVE PROPERTIES
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFUR TRIOXIDE
SURFACE PROPERTIES