Hydroisomerization and hydrocracking activity enhancement of a hierarchical ZSM-5 zeolite catalyst via atomic layer deposition of aluminium
- Author
- Sreeprasanth Pulinthanathu Sree, Jolien Dendooven (UGent) , Pieter CMM Magusin, Karine Thomas, Jean-Pierre Gilson, Francis Taulelle, Christophe Detavernier (UGent) and Johan Martens
- Organization
- Abstract
- Desilication of a ZSM-5 zeolite in basic medium creates intracrystalline mesoporosity advantageous for catalysis, but a decrease in acidity often limits the gain by improved accessibility of sites. Atomic layer deposition of aluminium (Al-ALD) using cycles of reaction and hydrolysis of trimethylaluminum was applied to desilicated ZSM-5 samples to enhance acidity. Framework as well as extra-framework aluminium species were introduced. Removal of extra-framework aluminium via mild acid leaching was beneficial to the acidity. The Al-ALD modified ZSM-5 specimen showed improved dispersion of platinum introduced via impregnation of a Pt(NH3)(4)Cl-2 precursor followed by oxidation and reduction. Hydroisomerization and hydrocracking performance was very sensitive to the ZSM- 5 zeolite modification with Al-ALD. The hierarchical sample from which the excess of deposited aluminium was removed showed the best penetration of platinum to the interior and was most active. It outperformed the original ZSM- 5 zeolite in activity and hydroisomerization selectivity. Alumina deposited by Al-ALD on the external surface of the ZSM- 5 zeolite particles is a preferential location for platinum deposition. Such a catalyst with externally positioned Pt was most selective for hydroisomerization.
- Keywords
- ACID SITES, MFI ZEOLITES, MESOPOROSITY DEVELOPMENT, ALKALI-TREATMENT, DESILICATED ZSM-5, ACCESSIBILITY, ISOMERIZATION, PERFORMANCE, H-ZSM-5, CRACKING
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8200999
- MLA
- Sree, Sreeprasanth Pulinthanathu, et al. “Hydroisomerization and Hydrocracking Activity Enhancement of a Hierarchical ZSM-5 Zeolite Catalyst via Atomic Layer Deposition of Aluminium.” CATALYSIS SCIENCE & TECHNOLOGY, vol. 6, no. 16, 2016, pp. 6177–86, doi:10.1039/c6cy00780e.
- APA
- Sree, S. P., Dendooven, J., Magusin, P. C., Thomas, K., Gilson, J.-P., Taulelle, F., … Martens, J. (2016). Hydroisomerization and hydrocracking activity enhancement of a hierarchical ZSM-5 zeolite catalyst via atomic layer deposition of aluminium. CATALYSIS SCIENCE & TECHNOLOGY, 6(16), 6177–6186. https://doi.org/10.1039/c6cy00780e
- Chicago author-date
- Sree, Sreeprasanth Pulinthanathu, Jolien Dendooven, Pieter CMM Magusin, Karine Thomas, Jean-Pierre Gilson, Francis Taulelle, Christophe Detavernier, and Johan Martens. 2016. “Hydroisomerization and Hydrocracking Activity Enhancement of a Hierarchical ZSM-5 Zeolite Catalyst via Atomic Layer Deposition of Aluminium.” CATALYSIS SCIENCE & TECHNOLOGY 6 (16): 6177–86. https://doi.org/10.1039/c6cy00780e.
- Chicago author-date (all authors)
- Sree, Sreeprasanth Pulinthanathu, Jolien Dendooven, Pieter CMM Magusin, Karine Thomas, Jean-Pierre Gilson, Francis Taulelle, Christophe Detavernier, and Johan Martens. 2016. “Hydroisomerization and Hydrocracking Activity Enhancement of a Hierarchical ZSM-5 Zeolite Catalyst via Atomic Layer Deposition of Aluminium.” CATALYSIS SCIENCE & TECHNOLOGY 6 (16): 6177–6186. doi:10.1039/c6cy00780e.
- Vancouver
- 1.Sree SP, Dendooven J, Magusin PC, Thomas K, Gilson J-P, Taulelle F, et al. Hydroisomerization and hydrocracking activity enhancement of a hierarchical ZSM-5 zeolite catalyst via atomic layer deposition of aluminium. CATALYSIS SCIENCE & TECHNOLOGY. 2016;6(16):6177–86.
- IEEE
- [1]S. P. Sree et al., “Hydroisomerization and hydrocracking activity enhancement of a hierarchical ZSM-5 zeolite catalyst via atomic layer deposition of aluminium,” CATALYSIS SCIENCE & TECHNOLOGY, vol. 6, no. 16, pp. 6177–6186, 2016.
@article{8200999,
abstract = {{Desilication of a ZSM-5 zeolite in basic medium creates intracrystalline mesoporosity advantageous for catalysis, but a decrease in acidity often limits the gain by improved accessibility of sites. Atomic layer deposition of aluminium (Al-ALD) using cycles of reaction and hydrolysis of trimethylaluminum was applied to desilicated ZSM-5 samples to enhance acidity. Framework as well as extra-framework aluminium species were introduced. Removal of extra-framework aluminium via mild acid leaching was beneficial to the acidity. The Al-ALD modified ZSM-5 specimen showed improved dispersion of platinum introduced via impregnation of a Pt(NH3)(4)Cl-2 precursor followed by oxidation and reduction. Hydroisomerization and hydrocracking performance was very sensitive to the ZSM- 5 zeolite modification with Al-ALD. The hierarchical sample from which the excess of deposited aluminium was removed showed the best penetration of platinum to the interior and was most active. It outperformed the original ZSM- 5 zeolite in activity and hydroisomerization selectivity. Alumina deposited by Al-ALD on the external surface of the ZSM- 5 zeolite particles is a preferential location for platinum deposition. Such a catalyst with externally positioned Pt was most selective for hydroisomerization.}},
author = {{Sree, Sreeprasanth Pulinthanathu and Dendooven, Jolien and Magusin, Pieter CMM and Thomas, Karine and Gilson, Jean-Pierre and Taulelle, Francis and Detavernier, Christophe and Martens, Johan}},
issn = {{2044-4753}},
journal = {{CATALYSIS SCIENCE & TECHNOLOGY}},
keywords = {{ACID SITES,MFI ZEOLITES,MESOPOROSITY DEVELOPMENT,ALKALI-TREATMENT,DESILICATED ZSM-5,ACCESSIBILITY,ISOMERIZATION,PERFORMANCE,H-ZSM-5,CRACKING}},
language = {{eng}},
number = {{16}},
pages = {{6177--6186}},
title = {{Hydroisomerization and hydrocracking activity enhancement of a hierarchical ZSM-5 zeolite catalyst via atomic layer deposition of aluminium}},
url = {{http://doi.org/10.1039/c6cy00780e}},
volume = {{6}},
year = {{2016}},
}
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