IMPORTANCE OF ANION-EXCHANGE RESIN AS SUPPORTED CATALYST

Wofatit SBW anion exchange resin supported with Fe (III) hydroxide has been used as a new catalyst for H2O2 decomposition in an aqueous medium. The rate constant, k (pgc), was evaluated with a resin crosslinked 4% divinylbenzene over the temperature range 25-40 degrees C. The reaction was first order with respect to [H2O2] in all cases. The rate constant increase in presence of ion exchange resin in the following forms:RSO(4)(2-) < RSO(3)(2-) < RPO(4)(3-) < RCl(-)< ROH(-)< RCO(3)(2). This is attributed to the strength of the electrostatic attraction with respect to the system concerned here. The activation parameters were calculated which show a high negative value of Delta S-# and low value of the activation energy. These values suggested that the reactions can involve both radicals (HO2-) and ions (HO2(-))