Chemical evolution of an isolated power plant plume during the TexAQS 2000 study

Autor:	Yin-Nan Lee, Jian Wang, L. J. Nunnermacker, Fred J. Brechtel, Stephen R. Springston, Lawrence I. Kleinman
Rok vydání:	2005
Předmět:	Atmospheric Science Ozone Analytical chemistry Mineralogy Aerosol Plume Dilution chemistry.chemical_compound chemistry Atmospheric chemistry Particle-size distribution Panache Nitrogen oxide General Environmental Science
Zdroj:	Atmospheric Environment. 39:3431-3443
ISSN:	1352-2310
Popis:	Stack emissions from a coal-burning power plant were measured during a research flight of the DOE G-1 during the Texas Air Quality Study (TexAQS 2000) on 10 September 2000. Clean upstream air and an isolated location allowed the plume to be unambiguously sampled during 12 successive downwind transects to a distance of 63 km—corresponding to a processing time of 4.6 h. The chemical transformation rates of sulfur and nitrogen primary pollutants into aerosol SO 4 2 - and HNO 3 yield independent values of OH concentration (8.0 and 11 × 10 6 cm - 3 , respectively) that are consistent within experimental uncertainty and qualitatively agree with constrained steady-state (CSS) box model calculations. Ozone production efficiency increases with plume age as expected. Primary aerosol emissions with D p > 5 μ m were sampled near the stack. As the plume ages, aerosol size distributions adjusted for dilution show constant number concentrations of aerosols D p > 10 nm and a marked increase in accumulation-mode particles ( D p > 0.1 μ m) as gas-to-particle-conversion causes smaller particles to grow.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::236947da89c1dc85466ac32ec8a7eb7e https://doi.org/10.1016/j.atmosenv.2005.01.060 Zobrazit plný text záznamu Full Text from ScienceDirect