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N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y

The n.m.r. spectrum of ethylene adsorbed on NaY, CaY-72, and CaY-87 is dependent on the coverage. At low coverages of ethylene, specific adsorption at the calcium ions gives rise to a broad resonance. As the coverage increases, non-specific adsorption becomes predominant and the line-width decreases...

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Main Authors: Egerton, T.A., Green, R.D.
Format: Article
Published: Royal Society of Chemistry 1971
Subjects:
Q Science (General)
QD Chemistry
Online Access:http://eprints.um.edu.my/25801/
https://doi.org/10.1039/TF9716702699
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spelling my.um.eprints.258012021-03-24T04:52:28Z http://eprints.um.edu.my/25801/ N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y Egerton, T.A. Green, R.D. Q Science (General) QD Chemistry The n.m.r. spectrum of ethylene adsorbed on NaY, CaY-72, and CaY-87 is dependent on the coverage. At low coverages of ethylene, specific adsorption at the calcium ions gives rise to a broad resonance. As the coverage increases, non-specific adsorption becomes predominant and the line-width decreases markedly. At very high coverages ethylene adsorbed on the calcium zeolites under-goes catalytic oligomerization and polymerization, as evidenced by the growth of bands due to methyl groups and to polyethylene. Except at very low coverages, very little variation of linewidth is observed on the NaY zeolite (or on NaX). Royal Society of Chemistry 1971 Article PeerReviewed Egerton, T.A. and Green, R.D. (1971) N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y. Transactions of the Faraday Society, 67. pp. 2699-2710. ISSN 0014-7672 https://doi.org/10.1039/TF9716702699 doi:10.1039/TF9716702699
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QD Chemistry
spellingShingle Q Science (General)
QD Chemistry
Egerton, T.A.
Green, R.D.
N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y
description The n.m.r. spectrum of ethylene adsorbed on NaY, CaY-72, and CaY-87 is dependent on the coverage. At low coverages of ethylene, specific adsorption at the calcium ions gives rise to a broad resonance. As the coverage increases, non-specific adsorption becomes predominant and the line-width decreases markedly. At very high coverages ethylene adsorbed on the calcium zeolites under-goes catalytic oligomerization and polymerization, as evidenced by the growth of bands due to methyl groups and to polyethylene. Except at very low coverages, very little variation of linewidth is observed on the NaY zeolite (or on NaX).
format Article
author Egerton, T.A.
Green, R.D.
author_facet Egerton, T.A.
Green, R.D.
author_sort Egerton, T.A.
title N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y
title_short N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y
title_full N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y
title_fullStr N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y
title_full_unstemmed N.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite Y
title_sort n.m.r. studies of ethylene adsorption by sodium and calcium forms of zeolite y
publisher Royal Society of Chemistry
publishDate 1971
url http://eprints.um.edu.my/25801/
https://doi.org/10.1039/TF9716702699
_version_ 1696976584584462336
score 13.18916

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