Thermal decomposition of hydrolysis products of Fe(OH)SO4

摘要: Abstract Hydrolysis products of Fe(OH)SO4 obtained at 15°C and concentrations 5 15 g 1−1 were examined by thermal decomposition X-ray diffraction studies. The found to be mixtures β-FeOOH, Fe2O3·2SO3·nH2O 1 2 (3Fe2O3·4SO3·9H2O). basic sulphates lose water crystallisation sulphur trioxide on heating. SO3 is lost in two stages. enthalpy changes for loss 158 kJ mol−1 product 176 2. corresponding 177 221 mol−1. entire process both the takes place a single mechanism Avrami's A3, which assumes random nucleation. linear regression kinetic equations, together with energies activation various types decomposition, are also given.