| Abstract | In this study, four different biomass fuels: firewood, woodchips, charcoal and ricehusk
were used in a number of stoves collected from some Asian countries and emission of
different pollutants were was studied. Efficiency of these stoves from water boiling test was
also estimated.
Emission factors for CO2 , CO, NO, THC, CH4 and TNMOC for Indian stove -
Priyagni, RFD-2 Model Thai woodstove and QB Philippine charcoal/firewood Cookstove
were estimated for wood combustion at different air flow rates. NO2 emission factor was
calculated only for Priyagni. QB Philippine cookstove was tested using wood chips. IRRI
ricehusk cookstove developed in Philippines was tested to determine the emission from wood
chips as well as ricehusk combustion. La Trau, a Vietnamese cookstove was tested to
estimate the emission factors for ricehusk combustion.
The emission factors of CO2 , CO, CH4 , NO, THC and TNMOC for wood combustion
was found in the ranges of 936.916 - 1612.265 (g/kg), 37.007 - 222.384 (g/kg), 3.49 - 38.55
(g/kg), 0.007 - 0.240 (g/kg), 7.650 - 91.979 (g/kg) and 3.319 - 58.472 (g/kg) respectively. The
emission factor for charcoal was found 2267.473 - 2325.059 (g/kg), 155 - 183.173 (g/kg) and
0.210 - 0.324 (g/kg) for CO2 , CO, and NO respectively. For ricehusk combustion, emission
factors were found in the ranges of 934.800 - 1105 (g/kg) for CO2 , 27.246 - 51.953 (g/kg) for
CO and 0.992 - 3.075 (g/kg) for CH4 respectively.
An experimental laboratory cookstove was designed to study the effects of different
design and operating parameters on emission.
An attempt has also been made to estimate the potential of mitigating emission from
domestic biomass cookstoves in three Asian countries; Nepal, Thailand and Vietnam. |