Iron and manganese hydroxide modified fibrous ion exchangers for catalytic water deoxygenation

Abstract

Catalysts based on iron and manganese hydroxide modified fibrous ion exchangers FIBAN K-4 and FIBAN X-1 have been synthesized and tested for hydrogenation of oxygen dissolved in water. It has been found that polyampholyte FIBAN X-1 samples containing ferric hydroxide are the most active in water deoxygenation: the residual oxygen content under the best process conditions does not exceed 20 g/1, which corresponds to the industry standards. It has been shown that the formation of iron - amino group nitrogen complex in the ion exchanger matrix occurs due to introduction of Fe³⁺ cations in FIBAN X-1 (pH 2-2.2). It has also been shown that iron and manganese hydroxide modified FIBAN X-1 is a highly active catalyst for H₂O₂ decomposition.