Characterization of the extra-large-pore zeolite UTD-1

Raul F. Lobo; Michael Tsapatsis; Clemens C. Freyhardt; Shervin Khodabandeh; Paul Wagner; Cong Yan Chen; Kenneth J. Balkus; Stacey I. Zones; Mark E. Davis

doi:10.1021/ja9708528

Characterization of the extra-large-pore zeolite UTD-1

Raul F. Lobo, Michael Tsapatsis, Clemens C. Freyhardt, Shervin Khodabandeh, Paul Wagner, Cong Yan Chen, Kenneth J. Balkus, Stacey I. Zones, Mark E. Davis

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

140 Scopus citations

Abstract

The molecular sieve UTD-1 is investigated using scanning and transmission electron microscopies (TEM), solid-state NMR spectroscopy, electron (ED) and X-ray diffraction (XRD), adsorption studies, and catalytic test reactions. The results confirm that UTD-1 is the first high-silica zeolite to contain a one;dimensional, extra-large 14-ring pore system. TEM and ED show that UTD-1 is faulted along the (002) planes. Simulations of XRD patterns of faulted structures using DIFFaX indicate that the XRD pattern of a framework containing the so-called double crankshaft chains is in better agreement with the experimental pattern than a framework with the narsarsukite chains previously reported. Thermal/hydrothermal stability studies show that UTD-1 has similar stability to other medium- and large-pore, high-silica zeolites. The ratio of isomerization to disproportionation, and the distribution of trimethylbenzene isomers in the m-xylene isomerization test reaction from UTD-1 are similar to those obtained from other large-pore zeolites (zeolites Y or L). However, UTD-1 shows a p-/o-xylene ratio of products below one.

Original language	English (US)
Pages (from-to)	8474-8484
Number of pages	11
Journal	Journal of the American Chemical Society
Volume	119
Issue number	36
DOIs	https://doi.org/10.1021/ja9708528
State	Published - Sep 10 1997

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Characterization of the extra-large-pore zeolite UTD-1. / Lobo, Raul F.; Tsapatsis, Michael; Freyhardt, Clemens C.; Khodabandeh, Shervin; Wagner, Paul; Chen, Cong Yan; Balkus, Kenneth J.; Zones, Stacey I.; Davis, Mark E.

In: Journal of the American Chemical Society, Vol. 119, No. 36, 10.09.1997, p. 8474-8484.

Research output: Contribution to journal › Article › peer-review

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title = "Characterization of the extra-large-pore zeolite UTD-1",

abstract = "The molecular sieve UTD-1 is investigated using scanning and transmission electron microscopies (TEM), solid-state NMR spectroscopy, electron (ED) and X-ray diffraction (XRD), adsorption studies, and catalytic test reactions. The results confirm that UTD-1 is the first high-silica zeolite to contain a one;dimensional, extra-large 14-ring pore system. TEM and ED show that UTD-1 is faulted along the (002) planes. Simulations of XRD patterns of faulted structures using DIFFaX indicate that the XRD pattern of a framework containing the so-called double crankshaft chains is in better agreement with the experimental pattern than a framework with the narsarsukite chains previously reported. Thermal/hydrothermal stability studies show that UTD-1 has similar stability to other medium- and large-pore, high-silica zeolites. The ratio of isomerization to disproportionation, and the distribution of trimethylbenzene isomers in the m-xylene isomerization test reaction from UTD-1 are similar to those obtained from other large-pore zeolites (zeolites Y or L). However, UTD-1 shows a p-/o-xylene ratio of products below one.",

author = "Lobo, {Raul F.} and Michael Tsapatsis and Freyhardt, {Clemens C.} and Shervin Khodabandeh and Paul Wagner and Chen, {Cong Yan} and Balkus, {Kenneth J.} and Zones, {Stacey I.} and Davis, {Mark E.}",

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AU - Lobo, Raul F.

AU - Tsapatsis, Michael

AU - Freyhardt, Clemens C.

AU - Khodabandeh, Shervin

AU - Wagner, Paul

AU - Chen, Cong Yan

AU - Balkus, Kenneth J.

AU - Zones, Stacey I.

AU - Davis, Mark E.

PY - 1997/9/10

Y1 - 1997/9/10

N2 - The molecular sieve UTD-1 is investigated using scanning and transmission electron microscopies (TEM), solid-state NMR spectroscopy, electron (ED) and X-ray diffraction (XRD), adsorption studies, and catalytic test reactions. The results confirm that UTD-1 is the first high-silica zeolite to contain a one;dimensional, extra-large 14-ring pore system. TEM and ED show that UTD-1 is faulted along the (002) planes. Simulations of XRD patterns of faulted structures using DIFFaX indicate that the XRD pattern of a framework containing the so-called double crankshaft chains is in better agreement with the experimental pattern than a framework with the narsarsukite chains previously reported. Thermal/hydrothermal stability studies show that UTD-1 has similar stability to other medium- and large-pore, high-silica zeolites. The ratio of isomerization to disproportionation, and the distribution of trimethylbenzene isomers in the m-xylene isomerization test reaction from UTD-1 are similar to those obtained from other large-pore zeolites (zeolites Y or L). However, UTD-1 shows a p-/o-xylene ratio of products below one.

AB - The molecular sieve UTD-1 is investigated using scanning and transmission electron microscopies (TEM), solid-state NMR spectroscopy, electron (ED) and X-ray diffraction (XRD), adsorption studies, and catalytic test reactions. The results confirm that UTD-1 is the first high-silica zeolite to contain a one;dimensional, extra-large 14-ring pore system. TEM and ED show that UTD-1 is faulted along the (002) planes. Simulations of XRD patterns of faulted structures using DIFFaX indicate that the XRD pattern of a framework containing the so-called double crankshaft chains is in better agreement with the experimental pattern than a framework with the narsarsukite chains previously reported. Thermal/hydrothermal stability studies show that UTD-1 has similar stability to other medium- and large-pore, high-silica zeolites. The ratio of isomerization to disproportionation, and the distribution of trimethylbenzene isomers in the m-xylene isomerization test reaction from UTD-1 are similar to those obtained from other large-pore zeolites (zeolites Y or L). However, UTD-1 shows a p-/o-xylene ratio of products below one.

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Characterization of the extra-large-pore zeolite UTD-1

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