Optimization of the combustion process of oil shale impacts the number of emissions
Around 30% of the energy is produced in Estonia by oil shale combustion and oil shale will remain as important back-up fuel for energy security for the period 2021–2030. In addition to production of greenhouse gases and harmful gaseous emissions, combustion of oil shale is releasing particles into the atmosphere. Combustion based particles are known to be harmful to human health and they have direct and indirect climate effects.
Finnish Meteorological Institute, together with University of Tampere, Tallinn University of Technology, Estonian Environmental Research Center and University of Helsinki, studied the emissions of oil shale burned in a circulating fluidized bed boiler in the test laboratory of Tallinn University of Technology. A comprehensive set of sophisticated instruments was utilized to investigate the primary and secondary emissions of oil shale combustion.
If the furnace temperature was too high, nitrogen oxides emissions increased, but if the furnace temperature was too low, gaseous organic compound emissions increased. In poor combustion, the amount of particulate pollutants, especially organic compounds, clearly increased.
The gained results are good input for technology selection if carbon capture and storage (CCS) technologies will be considered for enhanced CO2 reduction in oil shale industry.
Senior Researcher Minna Aurela, Finnish Meteorological Institute, firstname.lastname@example.org Aurela, M., Mylläri, F., Konist, A., Saarikoski, S., Olin, M., Simonen, P., Bloss, M., Nešumajev, D., Salo, L., Maasikmets, M., Sipilä, M., Dal Maso, M., Keskinen, J., Timonen, H., and Rönkkö T. Chemical and physical characterization of oil shale combustion emissions in Estonia Atmospheric Environment: X 12, 100139 (2021). https://doi.org/10.1016/j.aeaoa.2021.100139