Facile fabrication of a superior Cu(I)-NH4Y zeolite adsorbent for improving thiophene adsorption selectivity in the presence of aromatics or olefins

Adsorbents for the purification and recovery of biocompounds: An updated review

“…Zeolites are porous crystalline aluminosilicates whose structure is composed of a three-dimensional network of tetrahedrons of SiO 4 and Al 2 O 3 linked together by shared oxygen atoms. 59 The pore size of zeolites is uniform and different from that of other adsorbents, with sizes ranging from 3 to 10 Ǻ. 60 The Si/Al ratio in zeolite is never less than 1, but there is no upper limit.…”

Two-Stage Sequential Adsorption System for Denitrogenation and Desulfurization of Model Diesel Oil over Ion-Exchanged Y Zeolites

“…The adsorption route of Y-zeolite consists of direct S-adsorbent (S-M) bonds, π-complexation, Van der Waals interaction, and reactive adsorption. The π-complexation adsorption has two patterns: (i) the metal cation forms σ-bonds in free s-orbitals (σ donation) and (ii) the electron charges transfer from metal d-orbitals to the π* orbital or the antibonding p-orbital of thiophene ring (called as π back-donation). − Direct S–M bonds also occur via the electron donation from the electron pairs of the sulfur atom to the metal . Thus, the Y-zeolite with good sulfur compound adsorption ability could effectively remove thiophene from diesel oil and gasoline .…”

Effects of Lewis acid strength of monovalent coinage metals and zeolite frameworks on catalytic CO2 cycloaddition with ethylene oxide: A DFT study

“…32 Cu(I)-FAU zeolites were experimentally studied in the removal of sulfur compounds from fuels. [33][34][35] It was found that the Cu(I) in FAU zeolite can strongly interact with sulfur compounds via p-complexation interactions. Therefore, attempts have been devoted to synthesizing high amounts of Cu(I) ions in Y zeolite for adsorption desulfurization.…”