Abstract
2D-EXSY NMR methods were used to explore diffusion between different domains in zeolites on two very different length scales. Measurements were made on xenon-containing samples consisting of a mixture of NaX and NaY zeolite particles which give distinct resonance lines. The cross peaks observed were interpreted in terms of interparticle exchange, and exchange rates were measured as a function of particle size. This kind of experiment with a length scale of microns to mm should be useful in model studies of diffusion in packed catalyst beds. Measurements also were made to study exchange on a much smaller length scale between the main-channel and side-pocket sites in samples of microcrystalline Na-mordenite. Exchange rates and site occupancies were measured as a function of temperature, yielding activation energies for xenon desorption and intersite diffusion. Also, information was obtained on the distribution of inequivalent side-pocket sites which leads to the large xenon NMR linewidths for this type of site.
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References
Ito T., Fraissard J.: J. Chem. Phys.76, 5225 (1982)
Ripmeester J.A.: J. Am. Chem. Soc.104, 289 (1982)
Barrie P.J., Klinowski J.: Progr. in NMR Spectr.24, 91–108 (1992)
Raftery D., Chmelka B.F. in: NMR Basic Principles and Progress, vol. 30, pp. 111–158. New York: Springer-Verlag 1994.
Dybowski C., Bansal N., Duncan T.M.: Ann. Rev. Phys. Chem.42, 433 (1991)
Fraissard J., Ito T.: Zeolites8, 350 (1988)
Chen Q., Springuel-Huet M.A., Fraissard J. in: Studies in Surface Science and Catalysis, vol. 65, pp. 219–232. Amsterdam: Elsevier Science Publ. 1991.
Ripmeester J.A., Ratcliffe C.I.: J. Phys. Chem.94, 7652–7656 (1990)
Annen M.J., Davis M.E., Hanson B.E.: Catal. Lett.6, 331 (1990)
Terskikh V., Mudrakovski I., Mastikhin V.: J. Chem. Soc. Faraday Trans.89, 4239–4243 (1993)
Heink W., Kärger J., Pfeifer H., Stallmach F.: J. Am. Chem. Soc.112, 2175–2178 (1990)
Karger J., Pfeifer H., Stallmach F., Spindler H.: Zeolites10, 288 (1990)
Kärger J., Pfeifer H., Stallmach F., Feoktistova N.N., Zhdanov S.P.: Zeolites13, 50–55 (1993)
Jeener J., Meier B.H., Bachmann P., Ernst R.R.: J. Chem. Phys.71, 4546–4553 (1979)
Mansfeld M., Veeman W.: Chem. Phys. Lett.213, 153–157 (1993)
Larsen R.G., Shore J., Schmidt-Rohr K., Emsley L., Long H., Pines A., Janicke M., Chmelka B.F.: Chem. Phys. Lett.214, 220–226 (1993)
Ernst R., Bodenhausen G., Wokaun A.: Principles of Nuclear Magnetic Resonance in One and Two Dimensions, pp. 499, 528. Oxford: Clarendon Press 1992.
Tomaselli M., Meier B., Robyr P., Suter U., Ernst R.: Chem. Phys. Lett.205, 145–152 (1993)
Macura C., Ernst R.R.: Mol. Phys.41, 95–117 (1980)
Perrin C., Gipe R.K.: J. Am. Chem. Soc.106, 4036–4038 (1984)
Abel E.W., Coston T.P.J., Orrell K.G., Sik V., Stephenson D.: J. Magn. Reson.70, 34–53 (1986)
Perrin C., Dwyer T.J.: Chem. Rev.90, 935–967 (1990)
Drobny G., Pines A., Sinton S., Weitekamp D., Wemmer D.: Faraday Symp. Chem. Soc.13, 49 (1979)
Dubinin M., Erashko I., Kadlec O., Ulin V., Voloshchuk A., Zolotarev P.: Carbon13, 193 (1975)
Karger J., Pfeifer H., Heink W.: Advances in Magnetic Resonance12, 2–89 (1988)
Meier W.: Z. Kristallogr.115, 439 (1961)
Ripmeester J.A.: J. Magn. Reson.56, 247–253 (1984)
Vigne-Maeder F.: J. Phys. Chem.98, 4666–4672 (1994)
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Moudrakovski, I.L., Ratcliffe, C.I. & Ripmeester, J.A. Application of129Xe 2D-EXSY NMR to intra- and interparticle exchange in zeolites. Appl. Magn. Reson. 8, 385–399 (1995). https://doi.org/10.1007/BF03162653
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DOI: https://doi.org/10.1007/BF03162653