Zeolites and Zeolite-Based Catalysis

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Industrial Catalysis".

Deadline for manuscript submissions: 31 October 2024 | Viewed by 525

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Guest Editor
Laboratoire de Réactivité de Surface, Sorbonne Université-CNRS, UMR 7197 Campus Pierre et Marie Curie, 4, Place Jussieu, 75252 Paris, France
Interests: heterogeneous catalysis; zeolites; micro/mesoporous aluminosilicates; single-site porous zeolite catalysts; acid-base and redox properties; environmental and industrial catalysis
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Special Issue Information

Dear Colleagues,

The journal Catalysts plans to publish a Special Issue entitled “Zeolites and Zeolite-Based Catalysis”. Zeolites and zeotypes are widely used for multiple processes linked with catalysis, adsorption, and separation. Their outstanding performance is related to their unique structural, physical, and acid properties, which provide suitable shape and acid selectivity for many catalytic applications. Great efforts have been made in the literature to improve the catalytic properties of these materials. The design and synthesis of new zeolite materials represent one of the most important and interesting areas of material science, particularly the synthesis of new active and selective catalysts, which is a crucial challenge. The main focus is new synthesis methods of single-site hierarchical porous zeolite catalysts with acid–base and redox properties. Such catalysts, with active sites formed by the incorporation of heteroelements in their framework, have potential in environmental protection and bio-feedstock conversion into valuable chemicals.

I invite you to submit your original research papers or reviews on all aspects of catalysis to this Special Issue, sharing developments and recent progress regarding the synthesis, characterization and application of zeolites or zeolite-like materials as catalysts.

Prof. Dr. Stanislaw Dzwigaj
Guest Editor

Manuscript Submission Information

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  • novel synthesis and characterization
  • zeolite and zeolite-based catalysis
  • acid–base catalysis
  • redox catalysis
  • bifunctional catalysis
  • environmental catalysis
  • photocatalysis

Published Papers (1 paper)

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11 pages, 1842 KiB  
CO2 Oxidative Dehydrogenation of Propane to Olefin over Cr-M (M = Zr, La, Fe) Based Zeolite Catalyst
by Mingqiao Xing, Ning Liu, Chengna Dai and Biaohua Chen
Catalysts 2024, 14(6), 370; https://doi.org/10.3390/catal14060370 - 7 Jun 2024
Viewed by 400
CO2 oxidative dehydrogenation of propane (CO2-ODHP), being not only favorable for olefin production but also beneficial for CO2 emission control, has recently attracted great attention. Here, a series of single metal (Cr) and bimetal (Zr, La, Fe) modified ZSM-5 [...] Read more.
CO2 oxidative dehydrogenation of propane (CO2-ODHP), being not only favorable for olefin production but also beneficial for CO2 emission control, has recently attracted great attention. Here, a series of single metal (Cr) and bimetal (Zr, La, Fe) modified ZSM-5 zeolites were prepared via an impregnation method. It was found that the bimetal modified ZSM-5 possessed much higher C3H8 and CO2 conversion than that of monometallic modified Cr3%-ZSM-5 (Cr3%-Z5), especially for Cr3%Zr2%-ZSM-5 (Cr3%Zr2%-Z5), which displayed the highest activity (65.4%) and olefin yield (1.65 × 103 μmol·gcat1 h−1). Various characterizations were performed, including XRD, N2 adsorption-desorption, H2-TPR, Raman, XPS, HAAD-STEM, and TEM. It was revealed that Zr not only favored an improvement in the redox ability of Cr, but also contributed to the surface dispersion of loaded Cr species, constituting two major reasons explaining the superior activity of Cr3%Zr2%-Z5. To further improve CO2-ODHP catalytic behavior, a series of Cr3%-ZSM-5@SBA-15-n composite zeolite catalysts with diverse (ZSM-5/SBA-15) mass ratios were prepared (Cr3%-ZS-n, n = 0.5, 2, 6, 16), which screened out an optimum mass ratio of six. Based on this, the Cr3%Zr2%-ZS-6 compound was further prepared, and it eventually achieved even higher CO2-ODHP activity (76.9%) and olefin yield (1.72 × 103 μmol·gcat1 h−1). Finally, the CO2-ODHP reaction mechanism was further investigated using in situ FTIR, and it was found that the reaction followed the Mars–van Krevelen mechanism, wherein CO2 participated in the reaction through generation of polydentate carbonates. The Cr6+ constituted as the active site, which was reduced to Cr3+ after the dihydrogen reaction, and was then further oxidized into Cr6+ by CO2, forming polydentate carbonates, and thus cycling the reactive species Cr6+. Additionally, assisted by a Brönsted acid site (favoring breaking of the C-C bond), C2H4 and CH4 were produced. Full article
(This article belongs to the Special Issue Zeolites and Zeolite-Based Catalysis)
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