caa a22 4500 463188187 CHVBK 20180406164900.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10973-006-8063-7 doi (NATIONALLICENCE)springer-10.1007/s10973-006-8063-7 Reactivityof oil shale ashes in the binding of SO2 [Elektronische Daten] [T. Kaljuvee, M. Toom, A. Trikkel, R. Kuusik] The extensive use of fossil fuels in energy production causes serious pollution of atmosphere with SO2, CO2, NOx, etc. In Estonia the electricity production is based mainly on the pulverized firing (PF) of low-grade local fuel - Estonian oil shale (EOS) which is characterized by a low calorific value (~9 MJ kg-1) and a high content of mineral matter (65-70%) from which approximately 50% are carbonates. Since 2004, also two boilers based on circulating fluidized bed combustion (CFBC) of EOS are in exploitation. The present study is focused on the comparative investigation of the efficiency of different ashes collected from different technological points of CFB and PF boilers as sorbents for SO2. The influence of experimental temperature on the SO2-binding characteristics of ashes as well as the possibilities of activation of ashes (grinding, hydration) were investigated. It was shown that the SO2-binding capacity of initial ashes at 700°C and p(SO2)=190 mm Hg was for CFBC ashes 24-30 mg and for PF ashes 10-23 mg SO2 per 100 mg sample, the best binding capacities belonging to economizer ash (ECOA) and electrostatic precipitator ash from the 1st field (PESPA1f), respectively. However, during initial stage of binding the best results were obtained with air pre-heater ash (PHAA) and ESPA1f (both CFBC ashes). Grinding improved the SO2-binding ability, being the most effective in the case of bottom ash (BA) from CFBC and cyclone ash (PCA) from PF - increase in binding capacity 2 and 2.3 times, respectively. As compared to initial CFBC ashes, the binding characteristics of PF ashes remained lower even after grinding. Hydration and previous calcination improved the binding characteristics only of PF ashes. Hereby, the SO2-binding ability of CFBC ashes is better than of PF ashes and they are more promising sorbents for acidic gases, for example, for sulphur dioxide. Springer-Verlag, 2007 circulating fluidized bed combustion nationallicence oil shale nationallicence pulverized firing nationallicence sulphur dioxide capture nationallicence waste ashes nationallicence Kaljuvee T. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut Toom M. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut Trikkel A. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut Kuusik R. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers 88/1(2007-04-01), 51-58 1388-6150 88:1<51 2007 88 10973 https://doi.org/10.1007/s10973-006-8063-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-8063-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kaljuvee T. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut NATIONALLICENCE 700 1- Toom M. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut NATIONALLICENCE 700 1- Trikkel A. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut NATIONALLICENCE 700 1- Kuusik R. Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers 88/1(2007-04-01), 51-58 1388-6150 88:1<51 2007 88 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer