Monoliths with MFI zeolite layers prepared with the assistance of 3D printing: Characterization and performance in the gas phase isomerization of α-pinene
Authors:
- E. Hędrzak,
- A. Węgrzynowicz,
- Rafał Rachwalik,
- B. Sulikowski,
- P. Michorczyk
Abstract
Three-dimensional (3D) printing represents a promising technology of solid catalysts/reactors preparation with almost unlimited architecture. A casting route applied in this work for preparation of catalysts with the assistance of a 3D-printed template using the high-resolution Digital Light Processing (DLP) technology renders a possibility to control at the micron-scale macroporosity of the monolithic catalysts, their shape and size, with a very small shrinkage occurring during thermal treatment. We have demonstrated that the monoliths prepared with the assistance of 3D printing templates could be readily functionalized by deposition of ZSM-5 type zeolite (MFI) layers. The one-step hydrothermal process of a preparation and deposition was developed to control the Si/Al ratio and thickness (20–50 μm) of the zeolite layer. In all the cases, the phase composition (X-ray diffraction), porosity (low-temperature sorption of nitrogen), morphology and the Si/Al molar ratio in the layers (SEM/EDS), were studied. Moreover, the status of silicon and aluminium nuclei was followed by solid-state 29Si and 27Al MAS NMR, while the acidity of the zeolite layers was estimated using thermodesorption of ammonia. The catalytic performance of the monoliths was tested in the gas-phase isomerization of α-pinene. It was shown that the acidity and catalytic performance could be conveniently controlled by adjusting the Si/Al ratio in a starting gel. Over the sample with the lowest Si/Al ratio in MFI layer (Si/Al = 30), during 4 h on stream, the conversion of α-pinene changed between 97-79%, while the selectivity to limonene and camphene varied between 7–27 % and 31–39 %, respectively. Moreover, it was found that the monolithic catalyst can be regenerated by short treatment with air at 700 °C.
- Record ID
- CUT5a7c9de63247416cbe26cd7e1f3c6128
- Publication categories
- ;
- Author
- Journal series
- Applied Catalysis A-General, ISSN 0926-860X, e-ISSN 1873-3875
- Issue year
- 2019
- Vol
- 579
- Pages
- 75-85
- Other elements of collation
- fot.; tab.; wykr.; Bibliografia (na s.) - 85; Bibliografia (liczba pozycji) - 47; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 579
- Keywords in English
- 3D printing, monoliths, MFI layers, isomerization, α-pinene, alpha-pinene, gas phase
- DOI
- DOI:10.1016/j.apcata.2019.04.017 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0926860X19301693 Opening in a new tab
- Related project
- Drukowanie 3D - od projektu cyfrowego do praktycznych zastosowań katalitycznych. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN] - Synteza katalizatorów heterogenicznych o właściwościach kwasowych z zastosowaniem druku 3D. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN]
- Drukowanie 3D - od projektu cyfrowego do praktycznych zastosowań katalitycznych. . Project leader at PK: , ,
- Language
- eng (en) English
- Score (nominal)
- 100
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT5a7c9de63247416cbe26cd7e1f3c6128/
- URN
urn:pkr-prod:CUT5a7c9de63247416cbe26cd7e1f3c6128
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.