Differential thermal analysis and thermogravimetric analysis have been used to study EUROCAT-2 OXIDE (TiO2-V2O5-WO3). It has been found that water is removed at low temperature, and SO2 removal and surface reduction (O-2 evolution) take place at high temperature, both for a fresh and a used catalyst. (C) 2000 Elsevier Science B.V. All rights reserved.