Deep desulfurization of diesel by integrating adsorption and microbial method

摘要

Aiming for the deep desulfurization of diesel,a novel adsorption-bioregeneration system was constructed by combining adsorption and biodesulfurization processes.The sequence of adsorption capacity of DBT(dibenzothiophene)is AC(activated carbon)>NiY>AgY> alumina >13X.The sequence of selectivity of DBT toward naphthalene is NiY>AgY>alumina approx=13X>AC.For hydrotreated diesel,MAS(mesoporous aluminosilicates)showed high adsorption capacity,while MCM-41 and NaY showed low adsorption capacity.The bioregeneration process of these adsorbents was also carried out with P.delafieldii R-8 cells.Adding P.delafieldii R-8 cells can improve DBT desorption from adsorbents.The desorption of DBT from adsorbents by bioregeneration follows the sequence:13X > alumina >AgY>NiY> AC.Ag-MAS can be completely regenerated in in situ adsorption-bioregeneration system.