The production and separation of hydrogen and sulfur from thermal decomposition of hydrogen sulfide over vanadium oxide/sulfide catalyst

摘要

Thermal decomposition of hydrogen sulfide has been done in a flow system using pyrex tube reactor containing V_2 O_5/Al_2 O_3 catalyst (which it will change to V_2S_3/Al_2O_3). Continuous separation of sulfur and hydrogen hav been done by passing the reaction products on the ice-water for recovring of sulfur, and diethanolamine for separation of unreacted hydrogen sulphide. Hydrogen production was measured with time for constant H_2S feeding to the reactor. Conversion efficiency has been studied for different vanadium oxide/Alumina percent for temperature range of 723 K to 873 K. Arrhenius activation energies have been calcualted for thermal decomposition of H_2S for some catalytical composition, of vanadinm sulfide. The maximum conversion efficiency was 70% at 873 K for 0.38 (min.) resident time for 5-10 wt% V_2S_3/Al_2O_3 catalyst.