title: Theoretical studies of the nitrogen containing compounds adsorption behavior on Na(I)Y and rare earth exchanged RE(III)Y zeolites.
abstract: In this work, the adsorption behavior of nitrogen containing compounds including NH3, pyridine, quinoline, and carbazole on Na(I)Y and rare earth exchanged La(III)Y, Pr(III)Y, Nd(III)Y zeolites was investigated by density functional theory (DFT) calculations. The calculation results demonstrate that rare earth exchanged zeolites have stronger adsorption ability for nitrogen containing compounds than Na(I)Y. Rare earth exchanged zeolites exhibit strongest interaction with quinoline while weakest with carbazole. Nd(III)Y zeolites are found to have strongest adsorption to all the studied nitrogen containing compounds. The analysis of the electronic total charge density and electron orbital overlaps show that nitrogen containing compounds interact with zeolites by π-electrons of the compounds and the exchanged metal atom. Mulliken charge population analysis also proves that adsorption energies are strongly dependent on the charge transfer between the nitrogen containing molecules and exchanged metal atom in the zeolites.
authors.affiliation: Department of Chemistry, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Geng
authors.forename: Haitao
authors.initials: H
authors.lastname: Zhang
authors.forename: Xuefei
authors.initials: X
authors.lastname: Zhao
authors.forename: Wenyan
authors.initials: W
authors.lastname: Zan
authors.forename: Xionghou
authors.initials: X
authors.lastname: Gao
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Yao