Advanced search
1 file | 3.81 MB Add to list

Hydroisomerization and hydrocracking activity enhancement of a hierarchical ZSM-5 zeolite catalyst via atomic layer deposition of aluminium

(2016) CATALYSIS SCIENCE & TECHNOLOGY. 6(16). p.6177-6186
Author
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

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 3.81 MB

Citation

Please use this url to cite or link to this publication:

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 6.16 (2016): 6177–6186. Print.
APA
Sree, S. P., Dendooven, J., Magusin, P. C., Thomas, K., Gilson, J.-P., Taulelle, F., Detavernier, C., et al. (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.
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): 6177–6186.
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.
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://dx.doi.org/10.1039/c6cy00780e},
  volume       = {6},
  year         = {2016},
}

Altmetric
View in Altmetric
Web of Science
Times cited: