Synthesis of highly active Cu(I)-Y(III)-Y zeolite and its selective adsorption desulfurization performance in presence of xylene isomers

Abstract

A bimetal-exchanged NaY zeolite (Cu(I)-Y(III)-Y) with a desirable adsorptive desulfurization (ADS) performance was prepared and characterized by means of X-ray diffraction, specific surface area measurements, X-ray fluorescence spectrometer, X-ray photoelectron spectroscopy, thermal gravity analysis and Fourier transform infrared spectroscopy. The effect of Y(III) ions on ADS in the presence of the xylenes was investigated. Results indicated that the ADS performance of Y(III)-Y is higher than that of most reported CeY. The Y(III)-based Cu(I)-Y(III)-Y demonstrated the higher breakthrough loading than those of reported Ce(III)/Ce(IV)-based transition metal Y zeolites, showing that Y(III) ions play a promoting role in improving the ADS selectivity. For Cu(I)-Y(III)-Y, a new strong S-M interaction (S stands for sulfur, while M stands for metal) active site was formed, which might be caused by the synergistic effect between Cu(I) and Y(III). The Cu(I)-Y(III)-Y, which combined the advantages of Cu(I)-Y and Y(III)-Y, is a kind of promising adsorbent. The breakthrough loading decreased in the order of Cu(I)-Y(III)-Y > Y(III)-Y > Cu(I)-Y, and the effect of xylene isomers on the sulfur removal was in the order of ortho-xylene > meta-xylene > para-xylene, which exhibited the same trend with the bond order of xylenes.

The Effect of Zeolite Particle Size on Adsorption on Heavy Metals

“…An adsorbent is a solid substance that acts as an adsorbent (entrapment) for both liquid and gas molecules. Adsorbents with characteristics of high adsorption capacity and adsorption rate as well as being selected for target molecules are an ideal choice in an adsorption process [10,11]. Broadly speaking, the requirements for a material to be called worthy of being an adsorbent are having a high surface area indicated by a high pore volume, having a pore network that allows for the transport of adsorbate molecules, being able to release the adsorbed molecules through the desorption process, and being able to be regenerated easily [11].…”

Phytic Acid Doped Polyaniline as a Binding Coating Promoting Growth of Prussian Blue on Cotton Fibers for Adsorption of Copper Ions

“…Several types of porous inorganic materials [15] meeting the above standards have emerged in recent years, including clay [16], zeolite [17], montmorillonite [18], Prussian blue (PB) [19], Prussian blue analogues (PBAs) [20], etc. In particular, PB and PBAs are kinds of special metal-organic frameworks (MOFs) combined by transition metals (e.g., Fe 2+ , Fe 3+ , Cu 2+ , and Co 2+ ) and CN − ligand.…”

Adsorption and conversion of ethyl mercaptan on the surface of Ag‐Mn/NS‐HNbMoO6

“…In recent years, in order to reduce the damage of organic sulfides to the ecological environment, researchers have carried out some in-depth studies. At present, the desulfurization methods applied in industry mainly include hydrodesulfurization (HDS), 2,3 adsorption desulfurization (ADS), 4,5 oxidation desulfurization (ODS), 6,7 photocatalytic desulfurization (PDS) 8,9 and biological desulfurization (BDS). 10 HDS technology is a conventional way to remove industrial organic sulfide containing fat and without ring.…”