Facile fabrication of effective Cerium(III) hydroxylated species as adsorption active sites in CeY zeolite adsorbents towards ultra-deep desulfurization

Effect of Content of Cerium Ion on Brönsted‐Acid‐Catalyzed Reaction of Thiophene over CeY Zeolite Studied by In Situ FTIR Spectroscopy

“…The α Na of one‐time exchanged zeolites firstly increase and subsequently hardly change with the increase of the concentrations of Ce(NO 3 ) 3 solutions ( c ). The change rule is similar to our previous report . The reason for remaining unchanged is because some Na + ions located in the small cage (hexagonal prism and sodalite cage) of zeolite is difficult to be exchanged by the large hydrated Ce 3+ ions.…”

“…Further desulfurization experiments using CeY zeolites with different content of Ce ions under catalytic cracking conditions will be carried out in the future. On the other hand, desulfurization performance of CeY zeolites with different content of Ce ions prepared by low temperature calcination is more excellent than that of CeY zeolites prepared by high temperature calcination used in this paper due to the increase of Ce ions located in supercage of zeolite . According to our experimental results, high temperature calcination leads to most of Ce ions migrate from supercage the sodalite cages.…”

“…Thus, the S−M interaction between TP and Ce ion located in the supercage exhibits more influence than B‐acid‐catalyzed reaction of TP on adsorption desulfurization of CeY zeolite. Indeed, our recent research also found that when more Ce species as adsorption active sites were located in the supercages, the CeY‐0.075‐1 zeolite calcined at 150 °C exhibited remarkable sulfur breakthrough adsorption capacity.…”

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

“…For Cu(I)-Y(III)-Y and Y(III)-Y, the new band at 1452 cm −1 , which can be attributed to a red shift of vibration of ν(C=C) sym (Song et al 2014), can be assigned to TP molecules coordinated with Y(III) sites via the S atom (Yi et al 2014). And the new peak at 1452 cm −1 can also be assigned to the protonation of TP on the Brönsted acid sites (Sara et al 2002;Zu et al 2019a), which is in agreement with the TG-DTG analysis. It should be noted that the peak intensity at 1452 cm −1 was little affected by addition of xylenes (Shi et al 2013).…”

Insight into the nature and the transformation of the hydroxyl species in the CeY zeolite

“…Rare earth (RE)-exchanged Y zeolites are the major active components of fluid catalytic cracking (FCC) catalysts and efficient adsorbents of selective adsorptive desulfurization (SADS) from liquid fuels. [1][2][3][4][5][6][7][8] The RE species in the zeolites have been found to play a vital role in the above areas. Such species have been found to be the efficient active sites to promote the adsorption and catalytic transformation of molecules.…”