Catalytic Processes and Catalysts for Production of Elemental Sulfur from Sulfur-Containing Gases
Catalysis in Industry
, E-ISSN: 2070-0555
||catalysts, Claus process, elemental sulfur, hydrogen sulfide, selective oxidation, sulfur dioxide
Boreskov Institute of Catalysis SB RAS
The modern technologies for production of elemental sulfur are considered. It is demonstrated that along with the further wide application of the conventional Claus process with conventional alumina catalyst in the observable future some new trends which may significantly influence the technological picture of recovered sulfur manufacturing may be formulated: active development of Claus tail gas cleanup processes with the stress on replacement of subdewpoint Sulfreen-type processes by processes of hydrogen sulfide selective oxidation by oxygen; development of novel highly-efficient technologies for hydrogen sulfide decomposition to sulfur and hydrogen; application of new catalysts forms, first of all — at microfiber supports for Claus and H2S oxidation processes; wider application of titania and vanadia catalysts at the newly constructed Claus units; development of technologies and catalysts for direct purification of H2S-containing gases and for catalytic reduction of SO2 for sulfur recovery from smelter gases. All these prospective routes are actively developed by Russian science and some of them are completely based on domestic developments in this area.