Increasing the catalytic performance of erionite by hierarchization

Justyna Tekla , Louwanda Lakiss , Valentin Valchev , Karolina A. Taracha , Magdalena Jabłońska , Vladimir Girmand , Agnieszka M. Szymocha , Andrzej Kowalczyk , Kinga Góra-Marek , Jean-Pierre Gilson

Abstract

The texture and acidity of a parent synthetic erionite zeolite (ERI structure) are modified by a two-step top-down treatment involving acid (HNO3) and base (NaOH) biased leaching as well as an unbiased HF/NH4F leaching. These zeolites are compared to a bottom-up prepared nanosized ERI, UZM-12. The structural (XRD, 29Si MAS NMR), textural (N2 adsorption-desorption, STEM) and acidic (FT-IR spectroscopy of adsorbed probe molecules) properties of the parent and hierarchical ERI are also carefully monitored. Among all top-down hierarchization strategies applied for 8-ring ERI structure, the sequential leaching in acid (HNO3) and caustic (NaOH) solutions is the most efficient to add mesoporosity to the native microporosity. The catalytic performances of the hierarchical materials and their parent are assessed in the dealkylation of 1,3,5-triisopropylbenzene (TiPBz); they are in line with the mesoporous external surface area and the external surface acid site density for all samples. The best top-down hierarchical ERI has similar catalytic properties as the nanosized ERI, UZM-12.
Author Justyna Tekla
Justyna Tekla,,
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, Louwanda Lakiss
Louwanda Lakiss,,
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, Valentin Valchev
Valentin Valchev,,
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, Karolina A. Taracha
Karolina A. Taracha,,
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, Magdalena Jabłońska
Magdalena Jabłońska,,
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, Vladimir Girmand
Vladimir Girmand,,
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, Agnieszka M. Szymocha (FoAaE / DoSaA)
Agnieszka M. Szymocha,,
- Department of Soil Science and Agrophysics
, Andrzej Kowalczyk
Andrzej Kowalczyk,,
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, Kinga Góra-Marek
Kinga Góra-Marek,,
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, Jean-Pierre Gilson
Jean-Pierre Gilson,,
-
Journal seriesMicroporous and Mesoporous Materials, ISSN 1387-1811, e-ISSN 1873-3093, (N/A 100 pkt)
Issue year2020
No299
Pages1-8
Publication size in sheets0.5
Keywords in EnglishErionite, Demetallation, Hierarchical zeolites, 1,3,5-Triisopropylbenzene dealkylation
ASJC Classification1600 General Chemistry; 2211 Mechanics of Materials; 2500 General Materials Science; 3104 Condensed Matter Physics
DOIDOI:10.1016/j.micromeso.2020.110088
URL https://www.sciencedirect.com/science/article/pii/S1387181120300913?via%3Dihub
Languageen angielski
Score (nominal)100
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.198; WoS Impact Factor: 2018 = 4.182 (2) - 2018=3.84 (5)
Citation count*
Additional fields
FinansowanieThis work was financed by Grant No. 2015/18/E/ST4/00191 from the National Science Centre, Poland. The STEM studies were realized within the frame of the project “Infrastructure Improving of Centre of Excellence of Advanced Materials with Nano- and Submicron- Structure”, which is supported by the operational Program “Research and Development” financed through European Regional Development Fund.
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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