Title screen

This work is focused on the characterization of a novel vanadium pentoxide catalysts on a glass-fiber support. The catalyst support consists of a non-porous glass-fiber fabric covered with an additional external surface layer of porous secondary support of SiO2 . The vanadia active component is synthesized from vanadyl oxalate precursor by means of an impulse surface thermo-synthesis method. Such catalysts demonstrate high activity and appropriate selectivity in the reaction of H2 S oxidation by oxygen into sulfur in the practically important temperature range below 200°C. According to the characterization data, the freshly prepared vanadia catalyst partially consists of mostly the amorphous and badly ordered vanadia with some part of the wellcrystallized V2 O5 phase. Under the reaction conditions the main part of vanadia in the catalyst remains in the amorphous V2 O5 form, while the less part becomes reduces into of VO2 and other vanadium oxides (such as VO, V2 O3 V3 O7 and V4 O9 ). Most probably, the crystallized V2 O5 in course of reaction is responsible for the deep oxidation of hydrogen sulphide into SO2 , while the lower vanadium oxides promote the selective H2 S oxidation into elemental sulfur.