Abstract
The poisoning effect of CO2 on a HY catalyst for the dehydration of 2-(2-hydroxyethyl)-pyridine (HEP) to 2-vinylpyridine (VP) has been investigated by FT-IR analysis in the presence and absence of pyridine. CO2 was found to adsorb on sites not occupied by pyridine,i.e. on weak basic sites accompanying the strongly acidic sites, characteristic of Y zeolites in the protonated form. When the basic sites are occupied by preadsorbed CO2, HEP dehydration cannot take place any more through the minor mechanism, involving a couple of acid-base sites, and the reaction proceeds only through the major mechanism, involving a carbocation intermediate, on Brönsted acid sites only.
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References
L. Forni, D. Moscotti, E. Selli, I. Belegridi, M. Guisnet, D. Rohan, B. Gigante, C. Coutanceau, J.M. Silva, F. Alvarez:Dehydration of 2-(2-hydroxyethyl)-pyridine to 2-vinyl-pyridine over solid acid catalysts inHeterogeneous Catalysis and Fine Chemicals, IV, (Eds. A. Baiker, H.-U. Blaser and R. Prins), Elsevier, Amsterdam 1997 (in press).
H. Pines, J. Manassen:Adv. Catal.,16, 49 (1996).
F. Figueras, A. Nohl, Y. Trambouze:Trans. Faraday Soc.,67, 1155 (1971).
T. Barzetti, E. Selli, D. Moscotti, L. Forni:J. Chem. Soc. Faraday Trans.,92, 1401 (1996).
M. Brotas de Carvalho, F. Ramoa Ribeiro, E.G. Derouane:J. Mol. Catal.,85, 295 (1995).
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Forni, L., Selli, E., Fumagalli, E. et al. CO2 poisoning effect on HY zeolite dehydration catalyst. React Kinet Catal Lett 61, 267–273 (1997). https://doi.org/10.1007/BF02478382
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DOI: https://doi.org/10.1007/BF02478382