Removal of benzothiophene and dibenzothiophene from hydrocarbon fuels using CuCe mesoporous Y zeolites in the presence of aromatics

Lee, Kevin X.; Tsilomelekis, George; Valla, Julia A.

doi:10.1016/j.apcatb.2018.04.022

Cited by 65 publications

(67 citation statements)

References 78 publications

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“…CeY zeolite exhibited higher selectivity for sulfur compounds than for aromatics and thus was considered as a more promising adsorbent than CuY zeolite . However, the lower desulfurization capacity was observed for the refractory sulfur compounds (such as DMDBT) over CeY zeolites . Besides, our previous researches found the desulfurization performance of CeY zeolite could be decreased by competitive adsorption between olefins and thiophenic sulfur compounds .…”

Section: Introductionmentioning

confidence: 97%

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

Qin

et al. 2019

ChemistrySelect

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With NaY zeolite as the raw material, CeY zeolites with different content of Ce ions were prepared by liquid phase ion exchange (LPIE) method. Their chemical compositions were measured by X-ray fluorescence spectrometry (XRF) and in situ Fourier transform infrared spectroscopy (FTIR) techniques. Temperatureprogrammed desorption of ammonia (NH 3 -TPD) and FTIR spectra of pyridine (Py-FTIR) techniques were used to characterize acidity of CeY zeolites. With thiophene (TP, C 4 H 4 S) as probe molecule, adsorption and reaction of TP over CeY zeolites were researched by using in situ FTIR spectroscopy. Finally, it can be found that activity of Brönsted(B)-acid-catalyzed reaction of TP firstly increases and then has little change with the increase of concentration of Ce(NO 3 ) 3 solution (c), while increases with the increase of the exchange times by a combination of adsorption and reaction of TP over CeY zeolite with acidity of CeY zeolite and with location of Ce ion in CeY zeolite. Especially, the sulfurmetal (SÀ 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.[a] Z.

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Section: Introductionmentioning

confidence: 97%

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

Qin

et al. 2019

ChemistrySelect

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“…However, a recent literature has found that the protonation and oligomerization reactions of methylthiophenes on the REUSY zeolite can also occur at ambient temperature [52] . In addition, Valla et al have demonstrated that the Ce-exchanged Y zeolite can exhibit multiple adsorption modes, as they can adsorb the benzothiophene via π complexation and σ -bond interaction [29,53] .…”

Section: Introductionmentioning

confidence: 99%

Ultra-deep adsorptive removal of thiophenic sulfur compounds from FCC gasoline over the specific active sites of CeHY zeolite

Zhang

Qin

et al. 2019

Journal of Energy Chemistry

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“…For example, Lee et al. have studied desulfurization of transportation fuels over CuCe/mesoporous Y‐type zeolites . The FTIR spectra confirms that the as‐prepared catalyst exhibits high capacity for desulfurization due to the synergistic interaction between the Cu and Ce, leading to stronger interaction with sulfur compounds via π‐complexation and/or σ‐bonding.…”

Section: In Situ Investigations Of Reaction and Deactivation Mechanismsmentioning

confidence: 60%

Characterization of Metal‐zeolite Composite Catalysts: Determining the Environment of the Active Phase

et al. 2020

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Metal‐zeolite composite catalysts are attracting increased attention due to their unique multifunctional properties. However, it is challenging to identify the physicochemical environment of the active phase, which is essential to improve our understanding of the structure‐performance relationships of such complex catalysts. In this work, commonly available analytical techniques (FTIR, TEM, XRD, etc.) and state‐of‐the‐art user instrumentation (XAS, SANS, e‐TEM, etc.) are reviewed with respect to their applications at different stages of the catalyst lifetime, from early nucleation, to the reaction mechanism and deactivation. Each technique is discussed in detail with examples to provide suggestions and guidelines for choosing the characterization technique(s) that are most appropriate for determining the desired structure‐property relationships of metal‐zeolite composite catalysts. Understanding the most appropriate applications of characterization techniques promotes development of novel synthesis methodologies, and in turn, applications for designing active, selective and stable multifunctional metal‐zeolite composite catalysts.

show abstract

Removal of benzothiophene and dibenzothiophene from hydrocarbon fuels using CuCe mesoporous Y zeolites in the presence of aromatics

Cited by 65 publications

References 78 publications

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

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

Ultra-deep adsorptive removal of thiophenic sulfur compounds from FCC gasoline over the specific active sites of CeHY zeolite

Characterization of Metal‐zeolite Composite Catalysts: Determining the Environment of the Active Phase

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