Sulfur dioxide soot, reaction

Britton, L. G., and A. G. Clarke, Heterogeneous Reactions of Sulfur Dioxide and S02/N02 Mixtures with a Carbon Soot Aerosol, Atmos. Environ, 14, 829-839 (1980). 

Other hazardous reactions may occur with carbon (e.g., soot, graphite, activated charcoal), dimethyl sulfoxide, ethylene oxide, chlorine, bromine vapor, hydrogen bromide, potassium iodide + magnesium bromide, chloride or iodide, maleic anhydride, mercury, copper(II) oxide, mercury(II) oxide, tin(IV) oxide, molybdenum(III) oxide, bismuth trioxide, phosphoms trichloride, sulfur dioxide, chromium trioxide. 

Butler and Crossley (102) studied the reactivity of PAH, naturally present on soot particles, generated in a flame from an eth-ylene-air burner, in a reaction chamber with ambient air containing 5-10 ppm of sulfur dioxide or a mixture of nitrogen oxides. While exposure of up to three months to SO did not yield any significant loss of PAH, degradation by NO occurred readily and resulted in half lives varying between 7 and 30 days (for benzo(a)-pyrene and phenanthrene respectively),in correspondence with the order of reactivity for electrophilic substitution of aromatic systems. 

Air pollution occurs when the concentration of natural and/or man-made substances in the atmosphere becomes excessive and the air becomes toxic. Emissions from transportation, industry, and agriculture are man-made sources of air pollution. Primary pollutants are gases, liquids, and particulates dispersed into the atmosphere through either man-made or natural processes. In the United States, the primary pollutants are carbon monoxide, sulfur dioxide, nitrogen oxides, volatile organic compounds (VOCs), and particulate matter (soot, dust, etc.). Secondary pollutants are derived from primary pollutants that undergo a chemical reaction and become a different type of toxic material. In the United States, secondary pollutants are ozone, photochemical smog, and acid rain. 

Once growth stops, desorption of the gas occurs until the equilibrium concentration is reached. However, if the gas can be complexed by a fast enough chemical reaction, then it would be possible to contain the gas. Additives which result in a chemical reaction are present in the Stack gases themselves. Several additives for sulfur dioxide are vanadium pentoxlde, manganese sulfate, and soot Ccarbon). Preliminary work in this area was done with manganese sulfate by Matteson et al. [10]. 

Incomplete combustion will occur if there is not enough oxygen for the reaction to continue. This is much more common than complete combustion. Unlike complete combustion reactions, incomplete combustion reactions result in other products besides carbon dioxide and water. The byproducts of incomplete combustion reactions can include soot, which is elemental carbon (C). Other byproducts include nitrous oxides, sulfur oxides, and deadly carbon monoxide. 

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