Sintering and fouling characterization of ashes with high calcium oxide contentOts, Arvo; Parve, Teet; Skrifvars, Bengt-Johan; Hupa, MikkoProceedings of the 13th International Conference on Fluidized Bed Combustion. Vol. 21995 / [13] p.: ill Sulphur capture by oil shale ashes under atmospheric and pressurized FBC conditionsYrjas, K.Patrik; Külaots, Indrek; Hupa, Mikko; Ots, ArvoProceedings of the 13th International Conference on Fluidized Bed Combustion. Vol. 21995 / [7] l.: ill