Fluidized Bed Combustion of Residual Oils(III)

Loading Effects of Various Metal Oxides on Dolomite as Bed Material

Abstract

In order to promote the reaction between NO_x and NH₃ the catalitic activity of dolomite loading various metal oxides was tested.As a result dolomite loading Fe₂O₃ was found to be the most active of the bed materials tested.NO_x emission was reduced from 267 to 57 ppm by the addition of 2000 ppm of NH₃ when this bed material was used.Furthermore, combustion efficiency at temperatures below 900°C was improved by loading Fe₂O₃ on the dolomite.The sulfer removing efficacy of the Fe₂O₃-dolomite was exactly same as that of dolomite, and the concentration of SO_x+H₂S in flue gases was as low as 10 ppm at 850°C.