Particle mass and gaseous emissions from small scale modern wood stoves

Year 2019, Volume: 6 Issue: 2, 57 - 64, 16.09.2019

Md. Obaidullah

https://doi.org/10.31593/ijeat.518973

Cited By: 1

Abstract

The objectives of the paper were to evaluate
particle mass concentrations of PM₁ (size <1 µm) and PM_2.5
(size <2.5 µm), mass size distributions and CO emissions under standard
laboratory conditions obtained from two commercially available modern
residential wood stoves with capacity 10 kW and 20 kW. Four combustion batches
with minor modification of primary air flows into the combustion chamber for
each stove were conducted to evaluate the emission results. Particle mass
concentrations and size distributions were measured in real time using an
Electrical Low Pressure Impactor Plus (ELPI+) instrument, which measures
particles with a fast response time in a wide particle size range from 6 nm to
10 µm aerodynamic diameter. Gaseous concentrations of O₂ and CO₂
were measured continuously using a Horiba PG-250 analyzer and CO emissions were
measured using a Siemens Ultramat 6 gas analyzer. The measurement protocols of
each combustion test were conducted according to the European standard EN
13229. The combustion experiments were conducted in a laboratory of a stove
manufacturing plant in Belgium. The results showed that PM₁ and PM_2.5
concentrations of all the batches of both stoves varied from 116 to 327 mg/Nm³
and 139 to 413 mg/Nm³, respectively in the combustion cycle.
Particle mass size distribution for all batches from both stoves is very
similar showing a maximum in the fine mode at a particle size of around
330 nm to 500 nm. The CO emissions from all the batches varied from
447 to 1184 mg/Nm³ for the 10 kW stove and 958 to 1545 mg/Nm³
for the 20 kW stove. The experimental results of PM₁, PM_2.5
concentrations and CO emissions from combustion measurements could be useful
for the improvement of the combustion process as well as the reduction of
gaseous and particle mass emissions from these residential biomass combustion
appliances.

Keywords

particle mass concentrations, PM1, PM2.5, mass size distributions, CO emissions

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