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Opacity of monodisperse sulfuric acid aerosols
Abstract The plume opacity and droplet diameters of a monodisperse sulfuric acid aerosol were calculated as a function of the initial H2SO4 concentration, initial H2O concentration and final gas temperature after cooling from an original stack gas temperature of 300°C. Calculation assumptions include heterogeneous heteromolecular condensation of H2SO4 and H2O onto monodisperse nuclei of 0.05 μm dia., three aerosol particle nuclei concentrations of 106, 107 and 108 cm−3 (at 300°C and 760 mm Hg); and a stack or plume diameter of 6 m. The calculated results show that for the conditions considered and with the stack temperatures in excess of 125°C, initial H2SO4 stack gas concentrations of 10ppm or less will result in calculated opacities of less than 20 % for a plume diameter of 6 m. The results show that the calculated opacity is significantly affected by the initial H2SO4 and initial H2O concentrations and the final gas temperature. The increases in the calculated opacities upon cooling of the stack gases are similar in general to the increases in the measured opacities between instack and outstack reported by Nader and Conner (1978) for an oil-fired boiler.
Opacity of monodisperse sulfuric acid aerosols
Abstract The plume opacity and droplet diameters of a monodisperse sulfuric acid aerosol were calculated as a function of the initial H2SO4 concentration, initial H2O concentration and final gas temperature after cooling from an original stack gas temperature of 300°C. Calculation assumptions include heterogeneous heteromolecular condensation of H2SO4 and H2O onto monodisperse nuclei of 0.05 μm dia., three aerosol particle nuclei concentrations of 106, 107 and 108 cm−3 (at 300°C and 760 mm Hg); and a stack or plume diameter of 6 m. The calculated results show that for the conditions considered and with the stack temperatures in excess of 125°C, initial H2SO4 stack gas concentrations of 10ppm or less will result in calculated opacities of less than 20 % for a plume diameter of 6 m. The results show that the calculated opacity is significantly affected by the initial H2SO4 and initial H2O concentrations and the final gas temperature. The increases in the calculated opacities upon cooling of the stack gases are similar in general to the increases in the measured opacities between instack and outstack reported by Nader and Conner (1978) for an oil-fired boiler.
Opacity of monodisperse sulfuric acid aerosols
Pilat, Michael J. (author) / Wilder, James M. (author)
Atmospheric Environment ; 17 ; 1825-1835
1983-01-23
11 pages
Article (Journal)
Electronic Resource
English
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