Abstract:

The adsorption of H2S on MoO3/TiO2-Al2O3 was investigated by XPS, along with the measurement of breakthrough curve. The results showed: the amount of adsorbed H2S for each gram of MoO3 varied with the loadings of MoO3, and approached a maximum when the loading was 0.15g/g TiO2-Al2O3; the adsorption capacity of 0.15g MoO3/g TiO2-Al2O3 increased when the adsorbent was heated from 100 to 300℃, with the atomic ratio of S to Mo rising to c.a. 1, the adsorbent of 0.15g MoO3/gTiO2-Al2O3 could be regenerated easily by oxidation with air during 150 to 250℃; the adsorption process might be a chemical reaction as pointed out by reference [1]: H2S+MoO3=MoO3•SH2 or H2S+MoO3=MoO2•S+H2O.

Key words: MoO₃, TiO₂-Al₂O₃, XPS, H₂S, Adsorption