Deep desulfurization is a key process for the production of high value-added products from C5 distillate. In this work, different potassium salts modified gamma-Al2O3 adsorbents were prepared by an equal volume impregnation method, and characterized by N2 adsorption-desorption, SEM-EDS, TEM, CO2-TPD, XRD, and FT-IR. The C5 distillate with a sulfur content of 1200 μg/mL was desulfurized to less than 10 μg/mL within 24 hours by the static adsorption method. Under the optimized conditions that the sulfur content of raw material oil was 50 μg/mL, the liquid hourly space velocity was 1 h-1 and the temperature was 30 °C, the breakthrough sulfur capacity was 0.76% in the fixed bed. Selective adsorption of CS2 involves two processes: physical adsorption and chemical adsorption. Among them, physical adsorption is related to pore structure, and chemical adsorption includes three processes: adsorption, hydrolysis, and oxidation. CS2 was first adsorbed on the adsorbent, and then hydrolyzed to form H2S, which was further oxidized to form S/SO42-, and deposited on the surface of adsorbents. Adsorption, hydrolysis, and oxidation all play important roles in the removal of CS2.

Adsorption performance and mechanism of CS2 removed from cracked C5 distillate by gamma-Al2O3 decorated with potassium salts

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.