Abstract
Silica gel samples modified with different amounts of diethanolamine and monoethanolamine molecules are capable to adsorb H2S, CS2, SO2 and CH3SH. Once a complete coverage of the silica surface with amines through interaction with the surface hydroxyl groups has been reached an inactivation of the filter towards mercaptans occurs. FTIR-PAS spectra of the different silica samples are in agreement with these observations.
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