Next Article in Journal
Empirical Model of Thermal Comfort for Medium-Sized Cities in Subtropical Climate
Previous Article in Journal
Heavy Rainfall Events in Southern China Associated with Tropical Cyclones in the Bay of Bengal: A Case Study
Open AccessArticle

Photooxidation of Emissions from Firewood and Pellet Combustion Using a Photochemical Chamber

1
Mario Molina Center Chile, Santiago 7500494, Chile
2
Facultad de Ciencia, Departamento de Física, Universidad de Santiago de Chile, Santiago 9170124, Chile
3
Department of Earth and Atmospheric Science, University of Houston, Houston, TX 77204, USA
4
Facultad de Química y Biología, CEDENNA-Usach, Universidad de Santiago de Chile, Santiago 9170022, Chile
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(10), 575; https://doi.org/10.3390/atmos10100575
Received: 14 August 2019 / Revised: 4 September 2019 / Accepted: 17 September 2019 / Published: 24 September 2019
(This article belongs to the Section Aerosols)
The main emission source in Central and Southern Chilean cities is biomass combustion from residential heating and cooking due to old combustion technologies that are still widely utilized. In order to improve our understanding of biomass burning pollution and how it ages in the atmosphere, emissions from a pellet and wood stoves were studied with the aid of a photochemical chamber. Firewood combustion is an inefficient process that produces higher chamber loading of primary emission (gases and particles) compared to pellets. When these emissions are exposed to UV irradiation secondary particles are formed. However, with both fuels the secondary particle concentration was negligible with regards to the primary initial particle concentration. Observations show that when the initial mass is the same, firewood combustion emissions are more rapidly oxidized compared to emissions from pellet combustion. Particle aging evolution inside the chamber was evaluated using fragment tracer signals, via the mass fractions f44 vs f43 and f44 vs f60 triangles plots. For the same UV irradiation time, it was found that primary particles emitted form from firewood combustion show a slower aging rate compared to those emitted from pellet combustion, but this is due to high primary loading from wood combustion. Particle aging observed inside the chamber was similar to that found it in ambient urban air of Santiago de Chile in spring of 2011, indicating that chamber measurements can be a good indicator for some atmospheric processes. Levoglucosan, a well-known tracer for biomass combustion was also studied. It was found that wood stoves yielded higher levels than pellet stoves. This is due to the higher fuel combustion efficiency in pellet stoves, which yield low levoglucosan levels, making it difficult to use it for evaluation of the impact of pellet emissions on pollution. View Full-Text
Keywords: biomass combustion; organic aerosols; photochemical chamber; secondary aerosols biomass combustion; organic aerosols; photochemical chamber; secondary aerosols
Show Figures

Figure 1

MDPI and ACS Style

Reyes, F.; Vasquez, Y.; Gramsch, E.; Oyola, P.; Rappenglück, B.; Rubio, M.A. Photooxidation of Emissions from Firewood and Pellet Combustion Using a Photochemical Chamber. Atmosphere 2019, 10, 575.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop