Synthesis and catalytic performance of zeolite-Y supported on silicon carbide in n-heptane cracking

Dabbawala, Aasif A.; Vaithilingam, Balasubramanian V.; Mittal, Hemant; Wahedi, Yasser Al; Khan, Shaihroz; Joseph, Tony; Singaravel, Gnana; Morin, S.; Berthod, Mikaël; Alhassan, Saeed M.

doi:10.1016/j.apcata.2020.117866

Cited by 11 publications

(4 citation statements)

References 56 publications

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“…Figure 2 shows the XRD pattern of the NaY zeolite obtained in the primary crystallization. It can be observed the diffraction peaks attributed to FAU zeolites at 2θ=6.2°, 10.2°, 11.9°, 15.7°, 23.6°, 26.97° and 31.4° [21,22] . From the SEM images of NaY zeolite in Figure 3, it can be seen that the NaY zeolite has a typical cuboctahedral morphology with the size between 500–600 nm, which is consistent with the previous descriptions in the literature [22–24] …”

Section: Resultssupporting

confidence: 89%

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Aerosol Assisted Synthesis of Y/ZSM‐5 Composite Zeolite and Its Application in Cracking Reaction

et al. 2022

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Y/ZSM‐5 composite zeolite was synthesized by an aerosol assisted hydrothermal method including a two‐step crystallization. The aerosol technique was used to prepare the precursor of Y/ZSM‐5 composite zeolite. This helped to fully utilize the amorphous silica‐alumina species left in the primary crystallization solution of NaY zeolite, and to bring the two zeolites close to each other during the second crystallization step. The optimal adding sequence and synthesis conditions were investigated to reduce the amount of template and accelerate the crystallization rate. The composite zeolites were analyzed using XRD, SEM, nitrogen physical adsorption, NH3‐TPD techniques. It was found that the acid properties can be adjusted by modulating the SiO2/Al2O3 molar ratio of the secondary crystallization feed. The BET specific surface area of the optimal Y/ZSM‐5(20) composite zeolite is 502 m2/g, the pyrolysis conversion rate of 1,3,5‐triisopropylbenzene reaches 95.1 %, and the selectivity to benzene reaches 53.4 %.

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Section: Resultssupporting

confidence: 89%

“…[21,22] From the SEM images of NaY zeolite in Figure 3, it can be seen that the NaY zeolite has a typical cuboctahedral morphology with the size between 500-600 nm, which is consistent with the previous descriptions in the literature. [22][23][24]…”

Section: Characterization Of Nay Zeolitesupporting

confidence: 84%

Aerosol Assisted Synthesis of Y/ZSM‐5 Composite Zeolite and Its Application in Cracking Reaction

et al. 2022

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“…Successively, another zeolite-supported SiC catalyst was prepared by an Arabian research team with the assistance of a polymeric cationic template. 243 This latter induced a positive polarization on the SiC surface that attracted a negatively charged aluminosilicate and promoted the uniform growth of a zeolite (ZY) hence leading to stable ZY@SiC catalysts. The asprepared hierarchical material showed remarkable activity in the n-heptane cracking process with reaction rates up to 3.5 times higher with respect to unsupported ZY and increased resistance toward deactivation.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…Successively, another zeolite-supported SiC catalyst was prepared by an Arabian research team with the assistance of a polymeric cationic template . This latter induced a positive polarization on the SiC surface that attracted a negatively charged aluminosilicate and promoted the uniform growth of a zeolite (ZY) hence leading to stable ZY@SiC catalysts.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

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Removal of Pb2+ and Cd2+ by adsorption onto Y zeolite and its selectivity of retention in an actual contaminated effluent

et al. 2023

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Synthesis and catalytic performance of zeolite-Y supported on silicon carbide in n-heptane cracking

Cited by 11 publications

References 56 publications

Aerosol Assisted Synthesis of Y/ZSM‐5 Composite Zeolite and Its Application in Cracking Reaction

Aerosol Assisted Synthesis of Y/ZSM‐5 Composite Zeolite and Its Application in Cracking Reaction

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Removal of Pb2+ and Cd2+ by adsorption onto Y zeolite and its selectivity of retention in an actual contaminated effluent

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