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Delgado JA, Uguina MA, Agueda VI, et al. Adsorption and diffusion parameters of methane and nitrogen on microwave-synthesized ETS-4. Langmuir. 2008;24(12):6107-15doi: 10.1021/la7037894.
Delgado, J. A., Uguina, M. A., Agueda, V. I., & García-Sanz, A. (2008). Adsorption and diffusion parameters of methane and nitrogen on microwave-synthesized ETS-4. Langmuir : the ACS journal of surfaces and colloids, 24(12), 6107-15. https://doi.org/10.1021/la7037894
Delgado, José A, et al. "Adsorption and diffusion parameters of methane and nitrogen on microwave-synthesized ETS-4." Langmuir : the ACS journal of surfaces and colloids vol. 24,12 (2008): 6107-15. doi: https://doi.org/10.1021/la7037894
Delgado JA, Uguina MA, Agueda VI, García-Sanz A. Adsorption and diffusion parameters of methane and nitrogen on microwave-synthesized ETS-4. Langmuir. 2008 Jun 17;24(12):6107-15. doi: 10.1021/la7037894. Epub 2008 May 17. PMID: 18484754.
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Langmuir. 2008 Jun 17;24(12):6107-15. doi: 10.1021/la7037894. Epub 2008 May 17.

Adsorption and diffusion parameters of methane and nitrogen on microwave-synthesized ETS-4.

Langmuir : the ACS journal of surfaces and colloids

José A Delgado, María A Uguina, Vicente I Agueda, Alicia García-Sanz

Affiliations

  1. Department of Chemical Engineering, Universidad Complutense de Madrid, 28040, Madrid, Spain. [email protected]

PMID: 18484754 DOI: 10.1021/la7037894

Abstract

ETS-4 is a titanium silicate developed by Engelhard Corporation, which possesses a small pore network, the size of which can be reduced by heat treatment to improve its kinetic selectivity in nitrogen/methane separation. Most of the reported studies about ETS-4 employ crystals synthesized with conventional heating. Furthermore, information available on the adsorption properties of ETS-4, especially the diffusion properties, is scarce. In this work, Na-ETS-4 crystals have been synthesized by microwave heating and have been exchanged with strontium to obtain Sr-ETS-4 using also microwave heating. This method for obtaining the strontium form of ETS-4 has not been reported before. Both materials have been dehydrated to reduce their pore size. The adsorption and diffusion parameters of nitrogen and methane on these materials, which have not been measured for microwave-synthesized ETS-4 up to the present date, have been estimated by modeling the desorption breakthrough curves of both gases using a fixed bed of ETS-4 crystals. The kinetic selectivity of nitrogen over methane at 298 K of microwave-synthesized Sr-ETS-4 is 26. This value is higher than the maxima reported in the literature for this material.

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