TY  - EJOU
AU  - Wang, Chen 
AU  - Mesa, Cicilia Kemunto 
AU  - Bimenyimana, Samuel 
AU  - Bogonko, Nathan 
AU  - Adwek, George 
AU  - Mo, Yiyi 
AU  - Asemota, Godwin Norense Osarumwense 
AU  - Yuan, Changfu 
AU  - Chen, Yaowen 
AU  - Li, Changtai 
AU  - Ntagwirumugara, Etienne 
AU  - Nduwamungu, Aphrodis 

TI  - Effect of Varying Temperature and Oxygen on Particulate Matter Formation in Oxy-Biomass Combustion
T2  - Energy Engineering

PY  - 2022
VL  - 119
IS  - 3
SN  - 1546-0118

AB  - Offsetting particulate matter emissions has become a critical global aim as there are concerted efforts to deal with environmental and energy poverty challenges. This study consists of investigations of computing emissions of particulate matter from biomass fuels in various atmospheres and temperatures. The laboratory setup included a fixed bed electric reactor and a particulate matter (PM) measuring machine interfaced with the flue gas from the fixed bed reactor combustion chamber. The experiments were conducted at seven different temperatures (600°C–1200°C) and six incremental oxygen concentrations (21%–100%). Five biomass types were studied; A-cornstalk, B-wood, C-wheat straw, D-Rice husk, E-Peanut shell, each pulverized to a size of approximately 75 microns. The study shows that PM emitted during char combustion is consistently higher than that emitted during the de-volatilization. During de-volatilization, increase in temperature leads to linear decrease in PM emission between atmospheres of 21%O<sub>2</sub> to 50%O<sub>2</sub>, thereafter, between 70%O<sub>2</sub> to 100%O<sub>2</sub>; increase in temperature leads to a rise in PM emission. The average PM formation from all the five considered biomass is relatively comparable however, with differing atmospheres and temperatures, the fibrous and low-density biomass forms more PM. During char combustion, the study shows that at oxygen levels of 21%, 70%, 90% and 100%, increase in temperature leads to increased PM emission. The increase in oxygen concentration and temperature increases the rate of combustion hence diminishing the time of combustion.
KW  - Oxy-fuel combustion; particulate matter (PM); volatiles; char combustion

DO  - 10.32604/ee.2022.019248