The microspheric catalysts of sodium sulphite low-temperature oxidation by oxygen in water solutions

The composition and structure of the microspheric alumosilicates of Central Heating and Power Plants (CHРP) ashes is studied with the help of modern physical-chemical methods (XRD, scanning electronic microscopy, BET, elemental and chemical analysis). The microspheres activity in the reaction of Na 2 SO 3 oxidation by oxygen is studied by kinetic and potentiometric methods. By means of EPR and Moessbauer spectroscopy it is established that iron enter into the composition of cenospheres in two states Fe 3+ and Fe 2+ , thus, in the field of the iron content 3-4 wt. % the iron (3+) is in the form of single ions in an aluminosilicate matrix.