Hierarchical β zeolite by post-synthesis and direct synthesis: enhanced catalytic performance on the conversion of ethanol to 1,3-butadiene

Zhang, Minhua; Tan, Yuxin; Qin, Yunan; Yang, Guochao; Wang, Lingtao

doi:10.1007/s10934-022-01221-5

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…Amounts of 20 g of DeAl-⊎ and 1.073 g of ZrOCl 2 •8H 2 O were mixed in 200 mL of water with a Si/Zr molar ratio of 100, then evaporated at 80 °C. Finally, the samples were calcined in a muffle furnace at 550 °C for 4 h to afford Zr-incorporated ⊎ zeolite, 33,34 denoted as Zr-⊎.…”

Section: Catalyst Preparationmentioning

confidence: 99%

A kinetic study of ethanol coupling with acetaldehyde to 1,3‐butadiene over Zr‐β zeolite: insight into deactivation

Zhang

Tan

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND With the improvements in bioethanol production, the process of converting ethanol to 1,3‐butadiene (ETB) has received substantial scholarly attention, whose industrialization has been constrained by the stability of the catalysts. RESULTS In this work, the deactivation behavior of Zr‐β zeolite in the process of ethanol/acetaldehyde conversion to 1,3‐butadiene was investigated. In addition, the deactivation kinetics of ETB was studied using an isothermal differential microreactor. A kinetic model was developed and parametrized with the Langmuir–Hinshelwood mechanism, and the intrinsic kinetic equation was derived. The deactivation kinetic model of the ETB reaction was established from the active site content of the catalyst as a function of time on stream. The validity of the kinetic model was tested, and the results were found to be accurate. CONCLUSIONS Catalyst deactivation was mainly caused by coke species, which are mainly long‐chain unsaturated oxygenated organic compounds and aromatic compounds, covering Lewis acid sites in the microporous channels of the catalyst; nevertheless the zeotype topology and morphology were not destroyed. The kinetic data suggested that the reaction was of first order and the activation energy of the deactivation process was 75.59 kJ mol−1. © 2023 Society of Chemical Industry (SCI).

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Section: Catalyst Preparationmentioning

confidence: 99%

A kinetic study of ethanol coupling with acetaldehyde to 1,3‐butadiene over Zr‐β zeolite: insight into deactivation

Zhang

Tan

et al. 2023

J of Chemical Tech & Biotech

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“…Thus developing hierarchical porosity in the zeolite matrix is a simple and efficient way for catalytic performance improvement. For example our group has developed several strategies to develop hierarchical porosity in Zr‐ β zeolite, including surfactant‐templating, [34] protective desilication, [35] dual‐template, [36] bifunctional template synthesis, [37] and IDRC [38] . Also several reports claimed that tuning Lewis acidity can sequentially improve catalytic performance [19] .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Mesoporosity Generation and Lewis Acidity Enhancement in Zr‐Based Metallosilicalite for Promoting the Conversion of Ethanol‐Acetaldehyde to 1,3‐Butadiene

Jiang

Wang

et al. 2023

ChemCatChem

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Zr based metallosilicalites, especially Zr-ß, is promising catalyst for the conversion of ethanol to 1,3-butadiene, which is considered to be a sustainable alternative to petroleum steam cracking. However it is suffering from deactivation derived from coking and unsatisfied catalytic activity derived from deficient Lewis acidity. For these issues, a dissolution-recrystallization process through tetraethyl ammonium hydroxide treatment (TEAOH) for enhancing porosity and Lewis acidity of Zr-ß zeolite was developed in this study. A balance of dissolution and recrystallization existed in this process, which was produced by OH À etching and templating of TEA + ions, creating additional mesoporosity. Zirconium active sites maintained tetrahedral coordination, while the Lewis acidity was enhanced by creating higher proportion open sites in framework. The recrystallized Zr-ß exhibited higher catalytic activity and stability in the conversion of ethanol-acetaldehyde to butadiene due to the compromise of microporosity and mesoporosity, as well as the appropriate enhancement of Lewis acidity.

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“…16,17 Likewise, hierarchical β zeolite has already been developed via base-leaching and dualtemplating synthesis in our previous studies, with improved textural properties and therefore high catalytic performances for ETB. 9,18,19 However, the secondary porosity comes at the cost of microporosity, which may have negative effects. 20 Significantly, the introduction of mesopores in zeolite may have an indefinite effect on its acidic properties since the location of acid sites might change.…”

Section: Introductionmentioning

confidence: 99%

High accessibility to active sites of hierarchical nanocrystalline Zr-β zeolite in ethanol–acetaldehyde conversion to 1,3-butadiene

Jiang,

Yi,

Yang

et al. 2023

Catal. Sci. Technol.

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Hierarchical β zeolite by post-synthesis and direct synthesis: enhanced catalytic performance on the conversion of ethanol to 1,3-butadiene

Cited by 5 publications

References 39 publications

A kinetic study of ethanol coupling with acetaldehyde to 1,3‐butadiene over Zr‐β zeolite: insight into deactivation

A kinetic study of ethanol coupling with acetaldehyde to 1,3‐butadiene over Zr‐β zeolite: insight into deactivation

Simultaneous Mesoporosity Generation and Lewis Acidity Enhancement in Zr‐Based Metallosilicalite for Promoting the Conversion of Ethanol‐Acetaldehyde to 1,3‐Butadiene

High accessibility to active sites of hierarchical nanocrystalline Zr-β zeolite in ethanol–acetaldehyde conversion to 1,3-butadiene

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