You are here:
IDENTIFICATION OF CASO4 FORMED BY REACTION OF CAO AND SO2
Citation:
Gullett, B. AND K. Bruce. IDENTIFICATION OF CASO4 FORMED BY REACTION OF CAO AND SO2. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-89/133.
Description:
The article discusses the XRD-determination of the identity of CaSO4, formed by the reaction between CaO and S02, and the support of that determination by density measurements with helium pycnometry. The anhydrous CaS04 compound formed has an orthorhombic crystal structure and an analytically calculated density of 2.98 g/cu cm, versus the JCPDS reported value of 2.995 g/cu cm. The product of this reaction, formed during calcium-based sorbent injection for S02 removal from coal-fired power plants, has largely been assumed to have a density of 2.61 g/cu cm. Since reaction models must incorporate the product density in determining the rate of sorbent pore blockage or filling, correct identification of the reaction product is crucial.