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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 SiO 2 . 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 H2S 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 V 2 O5 phase. Under the reaction conditions the main part of vanadia in the catalyst remains in the amorphous V 2 O 5  form, while the less part becomes reduces into of VO 2  and other vanadium oxides (such as VO, V 2 O 3  V 3 O 7  and V 4 O 9 ). Most probably, the crystallized V 2 O 5  in course of reaction is responsible for the deep oxidation of hydrogen sulphide into SO 2 , while the lower vanadium oxides promote the selective H2S oxidation into elemental sulfur.

Characterization of vanadia catalysts on structured micro-fibrous glass supports for selective oxidation of hydrogen sulfide