Structured catalysts formed from the growth of
zeolites on substrates is an area of increasing interest due to the
increased efficiency of the catalytic process, and the ability to
provide superior heat transfer and thermal conductivity for both
exothermic and endothermic processes.
However, the generation of structured catalysts represents a
significant challenge when balancing the relationship variables
between materials properties and catalytic performance, with the
Na2O, H2O and Al2O3 gel composition paying a significant role in
this dynamic, thereby affecting the both the type and range of
application.
The structured catalyst films generated as part of this
investigation have been characterised using a range of techniques,
including X-ray diffraction (XRD), Electron microscopy (SEM),
Energy Dispersive X-ray analysis (EDX) and Thermogravimetric
Analysis (TGA), with the transition from oxide-on-alloy wires to
hydrothermally synthesised uniformly zeolite coated surfaces being
demonstrated using both SEM and XRD. The robustness of the
coatings has been ascertained by subjecting these to thermal cycling
(ambient to 550oC), with the results indicating that the synthesis time
and gel compositions have a crucial effect on the quality of zeolite
growth on the FeCrAlloy wires.
Finally, the activity of the structured catalyst was verified by a
series of comparison experiments with standard zeolite Y catalysts in
powdered pelleted forms.
[1] J. Jansen, et al., "Zeolitic coatings and their potential use in catalysis,"
Microporous and Mesoporous Materials, vol. 21, pp. 213-226, 1998.
[2] J. M. Zamaro, et al., "ZSM5 growth on a FeCrAl steel support. Coating
characteristics upon the catalytic behavior in the NOx SCR,"
Microporous and Mesoporous Materials, vol. 115, pp. 113-122, 2008.
[3] C. Badini and F. Laurella, "Oxidation of FeCrAl alloy: influence of
temperature and atmosphere on scale growth rate and mechanism,"
Surface and coatings technology, vol. 135, pp. 291-298, 2001.
[4] J. E. Samad, et al., "Structured catalysts via multiple stage thermal
oxidation synthesis of FeCrAl alloy sintered microfibers," Chemical
Engineering Journal, vol. 168, pp. 470-476, 2011.
[5] I. Yuranov, et al., "Zeolite/sintered metal fibers composites as effective
structured catalysts," Applied Catalysis A: General, vol. 281, pp. 55-60,
2005.
[6] M. Tatlier, " Adsorption Heat Pumps Utilizing Zeolite Coatings Grown
on Metal Surfaces. ," Master, Istanbul Technical University, Turkey,
2001.
[7] A. Dabrowski, Adsorption and its applications in industry and
environmental protection vol. 120: Elsevier, 1999.
[8] V. Meille, "Review on methods to deposit catalysts on structured
surfaces," Applied Catalysis A: General, vol. 315, pp. 1-17, 2006.
[9] R. Munoz, et al., "Zeolite Y coatings on Al-2024-T3 substrate by a
three-step synthesis method," Microporous and Mesoporous Materials,
vol. 86, pp. 243-248, 2005.
[10] Z. Wang, et al., "Synthesis of thin silicalite-1 films on steel supports
using a seeding method," Microporous and Mesoporous Materials, vol.
52, pp. 191-197, 2002.
[11] S. Mintova, et al., "Adhesivity of molecular sieve films on metal
substrates," Zeolites, vol. 17, pp. 462-465, 1996.
[12] X. Wu, et al., "Influence of an aluminized intermediate layer on the
adhesion of a ╬│-Al2O3 washcoat on FeCrAl," Surface and coatings
technology, vol. 190, pp. 434-439, 2005.
[13] M. Valentini, et al., "The deposition of ╬│-Al2O3 layers on ceramic and
metallic supports for the preparation of structured catalysts," Catalysis
today, vol. 69, pp. 307-314, 2001.
[14] M. Mies, et al., "Hydrothermal synthesis and characterization of ZSM-5
coatings on a molybdenum support and scale-up for application in micro
reactors," Catalysis today, vol. 110, pp. 38-46, 2005.
[15] J. ─îejka, Introduction to zeolite science and practice vol. 168: Elsevier
Science, 2007.
[16] A. Kostinko John, "Factors Influencing the Synthesis of Zeolites A, X,
and Y," in Intrazeolite Chemistry. vol. 218, ed: AMERICAN
CHEMICAL SOCIETY, 1983, pp. 3-19.
[17] J. G. Vassilakis and D. F. Best, "Novel zeolite compositions derived
from zeolite Y," ed: Google Patents, 1991.
[18] G. Danilatos, "Review and outline of environmental SEM at present,"
Journal of Microscopy, vol. 162, pp. 391-402, 2011.
[19] P. A. Jacobs and J. A. Martens, "Introduction to acid catalysis with
zeolites in hydrocarbon reactions," Studies in Surface Science and
Catalysis, vol. 58, pp. 445-496, 1991.
[1] J. Jansen, et al., "Zeolitic coatings and their potential use in catalysis,"
Microporous and Mesoporous Materials, vol. 21, pp. 213-226, 1998.
[2] J. M. Zamaro, et al., "ZSM5 growth on a FeCrAl steel support. Coating
characteristics upon the catalytic behavior in the NOx SCR,"
Microporous and Mesoporous Materials, vol. 115, pp. 113-122, 2008.
[3] C. Badini and F. Laurella, "Oxidation of FeCrAl alloy: influence of
temperature and atmosphere on scale growth rate and mechanism,"
Surface and coatings technology, vol. 135, pp. 291-298, 2001.
[4] J. E. Samad, et al., "Structured catalysts via multiple stage thermal
oxidation synthesis of FeCrAl alloy sintered microfibers," Chemical
Engineering Journal, vol. 168, pp. 470-476, 2011.
[5] I. Yuranov, et al., "Zeolite/sintered metal fibers composites as effective
structured catalysts," Applied Catalysis A: General, vol. 281, pp. 55-60,
2005.
[6] M. Tatlier, " Adsorption Heat Pumps Utilizing Zeolite Coatings Grown
on Metal Surfaces. ," Master, Istanbul Technical University, Turkey,
2001.
[7] A. Dabrowski, Adsorption and its applications in industry and
environmental protection vol. 120: Elsevier, 1999.
[8] V. Meille, "Review on methods to deposit catalysts on structured
surfaces," Applied Catalysis A: General, vol. 315, pp. 1-17, 2006.
[9] R. Munoz, et al., "Zeolite Y coatings on Al-2024-T3 substrate by a
three-step synthesis method," Microporous and Mesoporous Materials,
vol. 86, pp. 243-248, 2005.
[10] Z. Wang, et al., "Synthesis of thin silicalite-1 films on steel supports
using a seeding method," Microporous and Mesoporous Materials, vol.
52, pp. 191-197, 2002.
[11] S. Mintova, et al., "Adhesivity of molecular sieve films on metal
substrates," Zeolites, vol. 17, pp. 462-465, 1996.
[12] X. Wu, et al., "Influence of an aluminized intermediate layer on the
adhesion of a ╬│-Al2O3 washcoat on FeCrAl," Surface and coatings
technology, vol. 190, pp. 434-439, 2005.
[13] M. Valentini, et al., "The deposition of ╬│-Al2O3 layers on ceramic and
metallic supports for the preparation of structured catalysts," Catalysis
today, vol. 69, pp. 307-314, 2001.
[14] M. Mies, et al., "Hydrothermal synthesis and characterization of ZSM-5
coatings on a molybdenum support and scale-up for application in micro
reactors," Catalysis today, vol. 110, pp. 38-46, 2005.
[15] J. ─îejka, Introduction to zeolite science and practice vol. 168: Elsevier
Science, 2007.
[16] A. Kostinko John, "Factors Influencing the Synthesis of Zeolites A, X,
and Y," in Intrazeolite Chemistry. vol. 218, ed: AMERICAN
CHEMICAL SOCIETY, 1983, pp. 3-19.
[17] J. G. Vassilakis and D. F. Best, "Novel zeolite compositions derived
from zeolite Y," ed: Google Patents, 1991.
[18] G. Danilatos, "Review and outline of environmental SEM at present,"
Journal of Microscopy, vol. 162, pp. 391-402, 2011.
[19] P. A. Jacobs and J. A. Martens, "Introduction to acid catalysis with
zeolites in hydrocarbon reactions," Studies in Surface Science and
Catalysis, vol. 58, pp. 445-496, 1991.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:64358", author = "Rana Th. A. Al-Rubaye and Burcin Atilgan and Richard J. Holmes and Arthur A. Garforth", title = "Growing Zeolite Y on FeCrAlloy Metal", abstract = "Structured catalysts formed from the growth of
zeolites on substrates is an area of increasing interest due to the
increased efficiency of the catalytic process, and the ability to
provide superior heat transfer and thermal conductivity for both
exothermic and endothermic processes.
However, the generation of structured catalysts represents a
significant challenge when balancing the relationship variables
between materials properties and catalytic performance, with the
Na2O, H2O and Al2O3 gel composition paying a significant role in
this dynamic, thereby affecting the both the type and range of
application.
The structured catalyst films generated as part of this
investigation have been characterised using a range of techniques,
including X-ray diffraction (XRD), Electron microscopy (SEM),
Energy Dispersive X-ray analysis (EDX) and Thermogravimetric
Analysis (TGA), with the transition from oxide-on-alloy wires to
hydrothermally synthesised uniformly zeolite coated surfaces being
demonstrated using both SEM and XRD. The robustness of the
coatings has been ascertained by subjecting these to thermal cycling
(ambient to 550oC), with the results indicating that the synthesis time
and gel compositions have a crucial effect on the quality of zeolite
growth on the FeCrAlloy wires.
Finally, the activity of the structured catalyst was verified by a
series of comparison experiments with standard zeolite Y catalysts in
powdered pelleted forms.", keywords = "FeCrAlloy, Structured catalyst, and Zeolite Y.", volume = "7", number = "4", pages = "229-6", }