Abstract
Complex hydrocarbon mixtures were reacted for several hours in the presence of nitrogen oxides in a large ultraviolet irradiation chamber. The hydrocarbons were reacted at concentrations of 5, 10, and 20 ppM C in mixes containing /sup 1//2 or 1 ppM NOx. Rates of oxidation of nitric oxide, nitrogen dioxide dosage, hydrocarbon consumption, eye irritation, and yields of peroxyacetyl nitrate (PAN), formaldehyde, and oxidant were measured. If aromatics are substituted for olefins in a hydrocarbon mixture, there is a decrease in both oxidant and PAN dosages. Eye irritation increased with increasing aromatics. These reactivity parameters decreased by replacing aromatics with paraffins. (Air Pollut. Abstr.)
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