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Condensation of Olefins on Clays. Gas-Solid Systems. Part I: Gravimetric Methods

Published online by Cambridge University Press:  28 February 2024

Eduardo Choren ,
Alexander Moronta ,
Gustavo Varela ,
Arnedo Arteaga  and
Jorge Sánchez
Eduardo Choren
Affiliation:
Centro de Superficies y Catálisis, Facultad de Ingeniería, Universidad del Zulia, Apartado 15251, Maracaibo 4003A, Venezuela
Alexander Moronta
Affiliation:
Centro de Superficies y Catálisis, Facultad de Ingeniería, Universidad del Zulia, Apartado 15251, Maracaibo 4003A, Venezuela
Gustavo Varela
Affiliation:
Centro de Superficies y Catálisis, Facultad de Ingeniería, Universidad del Zulia, Apartado 15251, Maracaibo 4003A, Venezuela
Arnedo Arteaga
Affiliation:
Centro de Superficies y Catálisis, Facultad de Ingeniería, Universidad del Zulia, Apartado 15251, Maracaibo 4003A, Venezuela
Jorge Sánchez
Affiliation:
Centro de Superficies y Catálisis, Facultad de Ingeniería, Universidad del Zulia, Apartado 15251, Maracaibo 4003A, Venezuela
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Abstract

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The adsorption-condensation of olefins was studied on 7 adsorbents: 2 commercial clays, a natural clay and its protonated form, γ-alumina and porous and nonporous silicas. These adsorbents were characterized by X-ray diffraction (XRD), chemical analysis, thermogravimetric analysis (TGA), differential thermal analysis (DTA) and determination of specific surface area measurement by the BET method. The experiments were carried out gravimetrically, in gas- or vapor-solid systems, at 25 °C and on adsorbents dried at 120 °C. Adsorption-condensation of olefins are fast processes, diffusion controlled. Alumina and silicas adsorb olefins and paraffins only reversibly, but are unable to condense olefins. The water polarized by the countercations is the source of Brønsted acid sites. When the gas phase is evacuated or swept with inert gas, the condensation terminates. On clays, paraffins are reversibly adsorbed but no condensation was observed.

Keywords

AdsorptionClaysCondensationOlefinsOligomerizationParaffins
Type
Research Article
Information
Clays and Clay Minerals , Volume 45 , Issue 2 , April 1997 , pp. 213 - 220
Copyright
Copyright © 1997, The Clay Minerals Society

References

Breen, C., Deane, A.T. and Flynn, J.J.. 1987a. Vapor-phase sorption kinetics for methanol, propan-2-ol, and 2-methyl propan-2-ol on Al3+-, Cr3+-, and Fe3+-exchanged montmorillonite. Clays Clay Miner 35: 336–342.CrossRefGoogle Scholar
Breen, C., Deane, A.T. and Flynn, J.J.. 1987b. Vapor-phase sorption kinetics for tetrahydrofuran, tetrahydropyran, and 1,4-dioxan by Al3+- and Cr3+-exchanged montmorillonite. Clays Clay Miner 35: 343–346.CrossRefGoogle Scholar
Choren, E., Moronta, A., Huerta, L. and Meyer, A.. 1996. Comparative study of a Venezuelan clay. Rev Téc Ing Univ Zulia 19.2: 107–118.Google Scholar
Gonzo, E.E.. 1982. A rapid and accurate gravimetric technique for measuring the specific surface areas of porous solids. Appl Catal 2: 359–362.CrossRefGoogle Scholar
Grim, R.E. and Kulbicki, G.. 1961. Montmorillonite: High temperature reactions and classification. Am Mineral 46: 1329–1368.Google Scholar
Little, L.H.. 1966. Infrared spectra of adsorbed species. London: Academic Pr. 345 p.Google Scholar
Lunsford, J.H.. 1968. Surface interactions of NaY and decationated Y zeolites with nitric oxide as determined by electron paramagnetic resonance spectroscopy. J Phys Chem 72: 4163–4168.CrossRefGoogle Scholar
Mortland, M.M., Fripiat, J.J., Chaussidon, J. and Uytterhoeven, J.. 1963. Interaction between ammonia and the expanding lattices of montmorillonite and vermiculite. J Phys Chem 67: 248–258.CrossRefGoogle Scholar
Schilling, M.R.. 1990. Effects of sample size and packing in the thermogravimetric analysis of calcium montmorillonite Stx-1. Clays Clay Miner 38: 556–558.CrossRefGoogle Scholar
Stevens, M.P.. 1975. Polymer chemistry: An introduction. Reading, MA: Addison-Wesley. p 137–139.Google Scholar
Tarasevich, Y.I.. 1988. Acidic properties of water bound to the surfaces of mineral ion-exchangers. Theor Eksp Khim 24: 590–598 (in Russian). CA 110. 293333m.Google Scholar
Tennakoon, D.T.B., Schlögl, R., Rayment, T., Klinowski, J., Jones, W. and Thomas, J.M.. 1983. The characterization of clay-organic systems. Clay Miner 18: 357–371.CrossRefGoogle Scholar
Vogel, A.P., O'Connor, C.T. and Kojima, M.. 1990. Thermogravimetric analysis of the iso-butene oligomerization activity of various forms of synthetic mica-montmorillonite. Clay Miner 25: 355–362.CrossRefGoogle Scholar