Experimental Investigations of the Effects of Secondary Air Injection on Gaseous Emission Profiles (NOx, NO, NO2, CO) and Hydrocarbons (CxHx) in Cookstoves Using Charcoal from Eucalyptus glandis
Use of biomass in domestic cookstoves leads to the
release of oxides of nitrogen (NOx), nitric oxide (NO), nitrogen
dioxide (NO2), carbon monoxide (CO) and hydrocarbons CxHx that can be detrimental to health of the public and the environment. Attainment
of complete combustion is the best strategy for mitigating the release of these
emissions. This study sought to experimentally determine the effects of
secondary air injection on the emission profiles of NOx (NO & NO2),
CO and CxHx in a charcoal operated cookstove. Charcoal
from Eucalyptusglandis was bought from Kakuzi PLC. Composites from three batches were analyzed for
chemical composition and the stoichiometric air equivalent. Proximate analysis
data show that the charcoal composed 58.72% ± 3.3% C, 15.95% ± 1.2% Volatile
Matter, 4.69% ± 0.55% Moisture, 20.7% ± 0.8% Ash, High heat value (HHV) of 30.5
± 1.1 and 29.3 ± 1.3 Low heat value (LHV) (MJ/kg) with a chemical formula of C18H2O
and a stoichiometric air requirement of 5.28 ± 0.6
References
[1]
GOK (2019) Kenya Household Cooking Sector Study, Assessment of the Supply and Demand of Cooking Solutions at the Household Level. https://eedadvisory.com/wp-content/uploads/2020/09/MoE-2019-Kenya-Cooking-Sector-Study-compressed.pdf
[2]
Mugo, F. and Gathui, T. (2010) Biomass Energy Use in Kenya. International ESPA Workshop on Biomass Energy, Edinburgh, 19-21 October 2010, 20-77.
[3]
Lai, A., Shan, M., Deng, M.S., et al. (2019) Differences in Chemical Composition of PM2.5 Emissions from Traditional versus Advanced Combustion (Semi-Gasifier) Solid Fuel Stoves. Chemosphere, 233, 852-861. https://doi.org/10.1016/j.chemosphere.2019.06.013
[4]
Sun, J., Shen, Z.X., Zeng, Y.L., et al. (2018) Characterization and Cytotoxicity of PAHs in PM2.5 Emitted from Residential Solid Fuel Burning in the Guanzhong Plain. China Environ Pollution, 241, 359-368. https://doi.org/10.1016/j.envpol.2018.05.076
[5]
Sang, H.H., Lee, Y.S., Cho, J.R. and Lee, K.H. (2018) Efficiency Analysis of Air-Fuel and Oxy-Fuel Combustion in a Reheating Furnace. International Journal of Heat and Mass Transfer, 121, 1364-1370. https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.110
[6]
Kombe, E.Y., Lang’at, N., Njogu, P., et al. (2022) Process Modeling and Evaluation of Optimal Operating Conditions for Production of Hydrogen-Rich Syngas from Air Gasification of Rice Husks Using Aspen plus and Response Surface Methodology. Bioresource Technology, 361, Article ID: 127734. https://doi.org/10.1016/j.biortech.2022.127734
[7]
Pratiti, R., Vadala, D., Kalynych, Z. and Sud, P. (2020) Health Effects of Household Air Pollution Related to Biomass Cook Stoves in Resource Limited Countries and Its Mitigation by Improved Cookstoves. Environmental Research, 186, Article ID: 109574. https://doi.org/10.1016/j.envres.2020.109574
[8]
Shikorire, T., Asudi, G., et al. (2019) Analysis of Emission Profiles from Charcoal Produced from Selected Tree Species by Different Pyrolysis Methods. International Journal of Environmental Science and Technology, 16, 8-20. https://doi.org/10.1007/s13762-019-02220-x
[9]
Lea-Langton, A.R., Spracklen, D.V., Arnold, S.R., et al. (2019) PAH Emissions from an African Cookstove. Journal of the Energy Institute, 92, 587-593. https://doi.org/10.1016/j.joei.2018.03.014
[10]
Atiku, F.A., Lea-Langton, A.R., Bartle, K.D., et al. (2017) Some Aspects of the Mechanism of Formation of Smoke from the Combustion of Wood. Energy Fuels, 31, 1935-1944. https://doi.org/10.1021/acs.energyfuels.6b02639
[11]
Silva, F., Cristale, J., Ribeiro, M. and Marchi, M.R.R. (2011) Polycyclic Aromatic Hydrocarbons (PAHs) in Raw Cane Sugar in Brazil. Journal of Food Composition and Analysis, 24, 346-350. https://doi.org/10.1016/j.jfca.2010.08.012
[12]
Oluoch, I., Ndeda, J.O.H. and Njogu, P. (2017) Effect of Occupational Safety and Health Awareness on Work Environment in the Water Service Industry within Kisumu County—Kenya. Journal of Environmental Science, Toxicology and Food Technology, 11, 35-41. https://doi.org/10.9790/2402-1106013541
[13]
American Public Health Association (APHA) (1995) Standard Methods for the Examination for Water and Wastewater. 19th Edition, Byrd Prepess Springfield, Washington DC.
[14]
Paraschiv, L.S., Serban, A. and Paraschiv, S. (2020) Calculation of Combustion Air Required for Burning Solid Fuels (Coal/Biomass/Solid Waste) and Analysis of Flue Gas Composition. Energy Reports, 6, 36-45. https://doi.org/10.1016/j.egyr.2019.10.016
[15]
Dadile, M., Sotannde, O.A., Zira, B.D., Garda, M. and Yakubu, I. (2020) Evaluation of Elemental and Chemical Compositions of Some Fuelwood Species for Energy Value. International Journal of Forestry Research, 1, 8-22. https://doi.org/10.1155/2020/3457396
[16]
Jones, J.M., Ross, A.B., Mitchell, E.J.S., et al. (2017) Organic Carbon Emissions from the Co-Firing of Coal and Wood in a Fixed Bed Combustor. Fuel, 195, 226-231. https://doi.org/10.1016/j.fuel.2017.01.061
