Study of reduction kinetics of mixed oxides NiO-V2O5 with hydrogen

Abstract

The reduction with hydrogen of mixed oxides NiO--V205 of various composition was studied at 350-470 ~ by means of thermogravimetry. With increasing content of V20 S the reduction rate and the oxidation state of vanadium in the reduction product decrease. A correlation has been found between some physico-chemical properties of the system and reduction kinetics which can be quantitatively described by an Erofeev equation. The mutual interaction of the two components is demonstrated by the non-monotonous dependences of the reoxidation, secondary reduction kinetics and rate of reduction of thermally treated samples on the composition.