n-Butane Conversion on Sulfated Zirconia: The Mechanism of Isomerization and 13C-Label Scrambling as Studied by in situ 13C MAS NMR and ex situ GC-MS Full article
| Journal |
Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694 |
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| Output data | Year: 2003, Volume: 220, Number: 1, Pages: 233-239 Pages count : 7 DOI: 10.1016/S0021-9517(03)00243-4 | ||
| Tags | 13C-Label scrambling, GC-MS analysis, Isomerization, Mechanism, n-Butane, NMR spectroscopy, Sulfated zirconia | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 99-03-32454 |
| 2 | Siberian Branch of the Russian Academy of Sciences |
Abstract:
Using 13C MAS NMR, conversion of selectively 13C-labeled n-butane on sulfated zirconia catalyst has been demonstrated to proceed initially via two parallel routes: scrambling of the selective 13C label in the n-butane molecule and selective formation of isobutane. The combination of the results obtained by both in situ 13C MAS NMR and ex situ GC-MS analysis provides evidence for the monomolecular mechanism of the 13C-label scrambling, whereas isomerization into isobutane proceeds through a pure bimolecular mechanism. Further, the intermolecular mechanism of n-butane isomerization is complicated and turns into conjunct polymerization. Besides isobutane, conjunct polymerization gives also the products of butane disproportionation, propane and pentanes, as well as the stable cyclopentenyl cations; the latter may be in charge of catalyst deactivation.
Cite:
Luzgin M.V.
, Arzumanov S.S.
, Shmachkova V.P.
, Kotsarenko N.S.
, Rogov V.A.
, Stepanov A.G.
n-Butane Conversion on Sulfated Zirconia: The Mechanism of Isomerization and 13C-Label Scrambling as Studied by in situ 13C MAS NMR and ex situ GC-MS
Journal of Catalysis. 2003. V.220. N1. P.233-239. DOI: 10.1016/S0021-9517(03)00243-4 WOS Scopus РИНЦ ANCAN OpenAlex
n-Butane Conversion on Sulfated Zirconia: The Mechanism of Isomerization and 13C-Label Scrambling as Studied by in situ 13C MAS NMR and ex situ GC-MS
Journal of Catalysis. 2003. V.220. N1. P.233-239. DOI: 10.1016/S0021-9517(03)00243-4 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Feb 28, 2003 |
| Accepted: | May 5, 2003 |
| Published online: | Jul 22, 2003 |
| Published print: | Nov 15, 2003 |
Identifiers:
| Web of science: | WOS:000186260800024 |
| Scopus: | 2-s2.0-0142186714 |
| Elibrary: | 13434084 |
| Chemical Abstracts: | 2003:827156 |
| Chemical Abstracts (print): | 140:59246 |
| OpenAlex: | W2079957191 |