File Name : figure s1.tif Caption : figure s1 – replicate experiments processing 0.7 – 1.0 l of reactive orange 16 dye through the continuous photoreactor with catalyst regeneration carried out at the end of each experiment. conditions: residence time = 3.22 min, temperature = 20 °c and reactor pressure = 10 bar. File Name : figure s2.tif Caption : figure s2 – variation in the catalyst activity decay slope observed at different flow rates of reactive orange 16. a reciprocal function fitted over the observed flow rate range is shown. conditions: temperature = 20 °c and reactor pressure = 10 bar.