AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
Abstract View
Chemical Composition of Emissions Originating from Biomass and Municipal Solid Waste Burning in a Masonry Heater
MATTHEW BLOSS, Fanni Mylläri, Minna Aurela, Marek Maasikmets, Hanna Lii Kupri, Keio Vainumäe, Pauli Simonen, Laura Salo, Ville Niemelä, Topi Rönkkö, Hilkka Timonen, Finnish Meteorological Institute
Abstract Number: 272 Working Group: Combustion
Abstract In this study, wood logs or a combination of wood logs and normal household plastic waste called as municipal solid waste (MSW) were burnt in a masonry heater. The fire was lit by the top down method, which provides a higher heat from the start reducing the amount of unburnt emissions. After the fire had begun to die down, additional logs were added. The flue gases were diluted using a double ejector diluter. The emissions of three burning phases, ignition, flaming and smouldering were measured. The emissions of submicron particles were analysed using a Soot Particle - Aerosol Mass Spectrometer (SP-AMS), to gain information on the real time mass concentration, chemical composition and size distribution of submicron particles as well as concentrations of refractory black carbon (rBC) and some metals. Physical properties (e.g. number size distribution, number concentration) of submicron particles and concentrations of trace gases were also measured with an ELPI, CPC, FTIR and SMPS. The secondary aerosol formation potential was also studied by using a PAM (Potential Aerosol Mass) chamber which allowed simulation of the atmospheric aging of the emissions.
The aim was to compare primary and secondary emissions originating from biomass burning and from the inclusion of MSW to biomass burning. During ignition, primary particulate matter (PM) mostly consisted of BC and organics, very little inorganics were present. During the burning phases inorganics especially nitrate concentration in the particles increased with a decrease in organics. rBC concentrations remained the same for both primary and secondary, as expected. It was found that the PM mass and the amount of oxidised organic compounds were increased after the PAM chamber.