Energy & Fuels 2006, 20, 2357-2363
2357
Submicrometer Particle Formation and Mercury Speciation Under O2-CO2 Coal Combustion Achariya Suriyawong,†,‡ Michael Gamble,†,§ Myong-Hwa Lee,†,‡ Richard Axelbaum,‡ and Pratim Biswas*,†,‡ Aerosol and Air Quality Research Laboratory and EnVironmental Engineering Science, Campus Box 1180, Washington UniVersity in St. Louis, St. Louis, Missouri 63130, and Department of Chemical Engineering, College of Engineering, Architecture, and Technology, Oklahoma State UniVersity, Stillwater, Oklahoma 74078 ReceiVed April 25, 2006. ReVised Manuscript ReceiVed September 7, 2006
The characteristics of the submicrometer mode of ash and mercury speciation on combustion of coal in an oxygen-carbon dioxide and air (conventional) system were compared. The experiments were conducted at different O2:CO2 and O2:N2:CO2 mixing ratios. On replacing the nitrogen in air with carbon dioxide, the total mass of the particles in the submicrometer mode (0.5 µm) and a submicrometer mode (
