Absorptive Denitrogenation of Diesel Oil Using a Modified NaY Molecular Sieve

Y molecular sieve, modified by NH4+, Zn2+, Cu2+, or Cr3+, were characterized by X-ray diffraction, infrared spectrum, and nitrogen adsorption, and used to adsorb denitrogenation from model fuel containing quinoline and diesel oil. The molecular size of quinoline, calculated by using density functional theory, was 7.116×5.002 Å, implying that it does not access easily to 7.4 Å microporous pores of Y molecular sieve. The adsorption denitrogenation of CrY was the best due to some mesoporous pores, followed by CuY, ZnY, and NH4Y, implying that the absorption denitrogenation related to valence state metal ion, the better adsorption denitrogenation performance, the higher valence of metal ions. The basic nitrogen removal of diesel oil on CrY, CuY, ZnY, or NaY is 56.58%, 60.16%, 37.41%, and 23.72%, respectively.