Influence of Acid–Base Characteristics of Hierarchical Cu/Zr-MTW Zeolites on their Catalytic Properties in 1,3-Butadiene Production from Ethanol–Water Mixtures

Larina, Olga V.; Kurmach, M. M.; Kyriienko, Pavlo I.; Alekseenko, L. M.; Швец, А. В.; Soloviev, Sergiy O.

doi:10.1007/s11237-021-09703-4

Cited by 1 publication

(3 citation statements)

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“…In conclusion, the speciation of Zr did not change in the dissolution-recrystallization process, and Zr was tetrahedrally incorporated into the zeolite framework. 29 Si MAS NMR was employed to examine changes in Si species. All samples showed two peaks at À 100 ppm and À 110 ppm in the spectra shown in Figure S4, which were assigned to (SiO) 3 SiOH (Q3) and Si(OSi) 4 (Q4) species, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…X-ray hotoelectron spectras (XPS) were acquired on a Thermo ESCAlab 250xi spectrometer using Al Kα radiation. Solid-state 29 Si and 13 C magic-angle-spinning nuclear magnetic resonance (MAS NMR) spectras were performed on a Bruker 600 M nuclear magnetic resonance spectrometer. Fourier transform infrared resonance (FT-IR) measurement was executed using a Nicolet 6700 spectrometer with scanning ranged from 4000 cm À 1 to 400 cm À 1 at a resolution of 4 cm À 1 .…”

Section: Characterizationmentioning

confidence: 99%

“…The use of metallosilicate was firstly proposed by Ivanova et al in 2015. [22,23] Afterward Zr-β, [22,23] Ta-β, [24][25][26] Nb-β, [27] Zr-MTW, [28,29] ZnY-β [30,31] and other metallosilicates [32] were developed. Among them Zr based metallosilicate Zr-β showed the highest potential, which achieves the balance of activity, stability and cost.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%