“…Supported Cs salts of PW, Cs X H 3)X PW/SP (X = 1.5, 2.0 or 2.5), where SP stands for the support, namely DUSY or USY, were obtained by sequential impregnation and in situ reaction on the support according with the previous report [23]. In detail, Cs 2 CO 3 was supported onto SP by the incipient wetness impregnation, followed with drying at 110°C for 12 h and calcination at 550°C for 4 h. After this, PW was impregnated with excess of solution by contacting the corresponding support with the PW solution under constant stirring overnight at room temperature, followed by evaporation, drying and calcination.…”