MODIFIED HYDROGEN-SULFIDE ADSORBENTS CATALYSTS

Surface modification by vacuum deposition of coating layers can produc e new effective adsorbents catalysts for H2S removal. Metal coatings i mprove thermostability of sorbents and give the possibility of using t hem in the H2S containing gas mixtures at high temperatures. Some of t hem gain catalytic properties during the interaction with H2S due to s ulfurization of surface W layer to WS2 which is known to catalyze H2S decomposition to H-2 and S. Most promising materials for H-2 refining from H2S are modified Al2O3-ceramics and arbon fibers. Construction ma terial with catalytic active surface can also be obtained by surface m odification of thermostable ceramics.