Title:
Measurement Strategies Influencing the Results of Total Particle Emission from Biomass Combustion
Author(s):
Schön, C., Hartmann, H., Turowski, P.
Document(s):
Paper
Slide presentation
Abstract:
Particle emissions from small scale wood combustion are usually measured in the hot flue gas. In order to create conditions which are closer to the situation at the chimney top, the flue gas is sometimes diluted. This, however, causes a considerable increase in measured particle emission due to partial condensation of organic gaseous compounds (OGC). In this investigation 357 parallel PM measurements in the undiluted and diluted flue gas were performed, reflecting flue gases from eight different wood furnaces. In average a percentage of 47 % of the OGC-emission is methane, which cannot condense after flue gas cooling. But about 24 % of the OGC can condense and lead to an increase of measured particle emission if it is determined in the diluted flue gas. In addition, the thermal treatment of the filter media after PM sampling is also crucial. Particle mass losses of up to 50 % are determined if the sample, which was taken from diluted flue gas at about 50 °C, is thermally treated at 120 °C instead of lower drying temperature or using a desiccator. Furthermore, the need of combining filter cartridges with subsequent plane filters is demonstrated by the results. They also show that for high pollution levels a need to also rinse the flue gas sampling tract to collect any deposited particles is given. This is particularly true if sampling is performed from undiluted flue gases and at high OGC concentrations.
Keywords:
chimney stove, solid biofuel combustion, log wood boiler, PM emission, filter media treatment
Topic:
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Solid biofuel combustion for small and medium scale applications
Event:
21st European Biomass Conference and Exhibition
Session:
2CO.7.2
Pages:
585 - 590
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-2CO.7.2
Price:
FREE
