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Fugitive Emissions of CO and PM2.5 from Indoor Biomass Burning in Chimney Stoves Based on a Newly Developed Carbon Balance Approach
journal contribution
posted on 2020-02-13, 16:40 authored by Guofeng Shen, Wei Du, Zhihan Luo, Yaojie Li, Guoshuai Cai, Cengxi Lu, Youwei Qiu, Yuanchen Chen, Hefa Cheng, Shu TaoFugitive
emissions of smoke from stoves directly affect indoor
air quality. However, this important process has been very scarcely
evaluated so far. In this study, a novel approach has been developed
to quantify fugitive emissions in the field, and for the first time,
field-based fugitive emission factors (EFs) and fugitive fractions
of carbon monoxide (FCO) and fine particulate
matter (PM2.5) (FPM2.5) from indoor biomass burning in the real world are reported.
Fugitive EFs were more likely log-normally distributed and positively
correlated to the stack and total EFs. The calculated FCO and FPM2.5 were
13.5 ± 10.3% and 27.9 ± 13.7%, respectively, which were
higher than those determined in laboratory studies. Fugitive fractions
were normally distributed, and the mean FPM2.5 was close to the assumed value of 25% in the
World Health Organization Guidelines for Indoor Air Quality: Household
Fuel Combustion; however, the FCO was
significantly lower than 25%. The total EFs calculated on the basis
of the traditional carbon mass balance method were positively correlated
with the total summarized from fugitive and stack emissions but were
considerably underestimated, especially for PM2.5, as the
mixing ratio of PM2.5 to carbon dioxide in fugitive emissions
was found to be higher than that in the chimney exhaust.