Articles with "zeolite catalysts" as a keyword



Synthesis, Characterization and Catalytic Dehydration of Glycerol to Acrolein Over Phosphotungstic Acid Supported Y-Zeolite Catalysts

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Published in 2017 at "Catalysis Letters"

DOI: 10.1007/s10562-017-2236-9

Abstract: AbstractVapour phase catalytic dehydration of glycerol to acrolein was studied over phosphotungstic acid (PTA) supported (with different loadings of PTA) on Y-zeolite catalysts. The active component PTA was varied between 10 and 40% w/w on… read more here.

Keywords: dehydration glycerol; zeolite catalysts; pta; pta zeolite ... See more keywords

Development of Magnesium Oxide–Zeolite Catalysts for Isomerization of Fatty Acids

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Published in 2018 at "Catalysis Letters"

DOI: 10.1007/s10562-018-2601-3

Abstract: Three zeolites were treated with magnesium nitrate hexahydrate (Mg(NO3)2⋅6H2O) salt to generate active magnesium oxide (MgO)–zeolite catalysts for the isomerization of oleic acid to give the iso-oleic acid (precursor of isostearic acid). Isostearic acid is… read more here.

Keywords: magnesium oxide; isomerization; magnesium; zeolite catalysts ... See more keywords

Control of methane chlorination with molecular chlorine gas using zeolite catalysts: Effects of Si/Al ratio and framework type

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Published in 2020 at "Catalysis Today"

DOI: 10.1016/j.cattod.2020.01.014

Abstract: Abstract CH4 chlorination with Cl2 gas is used for the production of chlorinated products via C H bond activation in CH4. Due to the high reactivity of Cl2, this reaction can occur spontaneously under UV… read more here.

Keywords: chlorination; gas; ch4; framework type ... See more keywords

Evaluation of zeolite catalysts on product distribution during sweet sorghum bagasse catalytic pyrolysis

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Published in 2021 at "Energy"

DOI: 10.1016/j.energy.2020.118799

Abstract: Abstract The catalytic fast pyrolysis (CFP) of sweet sorghum bagasse was carried out in a three-stage tube furnace to achieve high value utilization of sweet sorghum bagasse. The effects of zeolite catalysts (hierarchical HZSM-5, HBeta,… read more here.

Keywords: zeolite catalysts; sweet sorghum; product distribution; pyrolysis ... See more keywords

Ethane Ammoxidation over Sn/H-Zeolite Catalysts: Toward the Factors Contributing to the Yield of Acetonitrile.

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Published in 2023 at "ACS applied materials & interfaces"

DOI: 10.1021/acsami.3c04005

Abstract: Different Sn/H-zeolite (β, MOR, SSZ-13, FER, and Y zeolite) catalysts are prepared with the improved impregnation method. The effects of reaction temperature and the composition of the reaction gas (ammonia, oxygen, and ethane) on the… read more here.

Keywords: ethane ammoxidation; zeolite; reaction; yield ... See more keywords

Computational Insights into the Mechanism of the Selective Catalytic Reduction of NOx: Fe- versus Cu-Exchanged Zeolite Catalysts

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Published in 2019 at "ACS Omega"

DOI: 10.1021/acsomega.9b00600

Abstract: We computationally investigate the mechanism of the reduction half-cycle of the selective catalytic reduction of nitrogen oxides with ammonia. We compare both Fe- and Cu-exchanged zeolite catalysts and aim at exploring all accessible reaction pathways.… read more here.

Keywords: catalytic reduction; reduction; mechanism; selective catalytic ... See more keywords
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Structure and catalytic characterization of a second framework Al(IV) site in zeolite catalysts revealed by NMR at 35.2 Tesla.

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Published in 2020 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.0c00590

Abstract: Ultra-high field 1H-27Al 2D correlation NMR experiments demonstrate that at least two framework Al(IV) sites with hydroxyl groups can exist in acidic zeolite catalysts in their dehydrated and catalytically active states. In addition to the… read more here.

Keywords: framework; field; zeolite catalysts; site ... See more keywords

Hydroformylation over Zeolite Catalysts with Solvophobic Micropores.

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Published in 2025 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.4c18771

Abstract: Traditional gas-liquid-solid triphase reactions are often limited by gas solubility and diffusion in the liquid phase. We reported that a solvophobic catalyst with gas-filled micropores could enrich enormous amounts of gas molecules to accelerate Rh-catalyzed… read more here.

Keywords: zeolite catalysts; catalysts solvophobic; gas; hydroformylation zeolite ... See more keywords

Microwaves effectively examine the extent and type of coking over acid zeolite catalysts

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Published in 2017 at "Nature Communications"

DOI: 10.1038/s41467-017-00602-8

Abstract: Coking leads to the deactivation of solid acid catalyst. This phenomenon is a ubiquitous problem in the modern petrochemical and energy transformation industries. Here, we show a method based on microwave cavity perturbation analysis for… read more here.

Keywords: acid zeolite; coke; zeolite; microwaves effectively ... See more keywords

Liquid metals for boosting stability of zeolite catalysts in the conversion of methanol to hydrocarbons

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Published in 2024 at "Nature Communications"

DOI: 10.1038/s41467-024-46232-9

Abstract: Methanol-to-hydrocarbons (MTH) process has been considered one of the most practical approaches for producing value-added products from methanol. However, the commonly used zeolite catalysts suffer from rapid deactivation due to coke deposition and require regular… read more here.

Keywords: zeolite catalysts; coke deposition; zeolite; conversion ... See more keywords

Aromatisation of bio-derivable isobutyraldehyde over HZSM-5 zeolite catalysts

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Published in 2019 at "Green Chemistry"

DOI: 10.1039/c9gc00483a

Abstract: A novel efficient route to obtain aromatic products based on biomass feedstock was successfully demonstrated with high BTX yields. read more here.

Keywords: bio derivable; aromatisation bio; zeolite catalysts; hzsm zeolite ... See more keywords