Removal of Hydrogen Sulfide from Gaseous Mixtures.
Shultz-FG; Chidester-GE; Collet-FE
U S Pat 3 579 293 1971 May; :
H2s is removed from gaseous mixtures by contacting them at elevated temperatures with pellets made from a sintered admixture of fe2o3 and fly ash. The mixture should contain at least 50 pct fly ash of an average particle size of 50 micrometers. The pellets are regenerated to fresh condition by passage of air or o2 over them at 1,000 deg.-1,250 Deg. F. As many as 9 cycles of h2s absorption at 1,000 deg.-1,500 Deg. F with air regeneration at 1,000 deg.-1,250 Deg. F may be carried out without loss of h2s sorption capacity.
U.S. Pat. 3,579,293; May 18, 1971; Chem. Abstr. 75:91,549Y