Cyclodimerisation and cyclotrimerisation during the ring-opening reactions of ethylene sulfide (thiirane) over acidic molecular sieves and alumina

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Abstract

The Iransformations of ethylene sulfide were studied at three reaction temperatures (423, 473 and 523 K) on different acidic molecular sieves (HZSM-5, HY and AIMCM-41) and alumina in a pulse system. The main reaction pathways were found to be desulfurisation, cyclo-oligomerisation, the latter being more important. In this reaction channel mainly direct dimer (six-membered ring: 1,4-dithiane) and trimer (1,4,7-trithiacyclononane) formation occurred. The former product was always predominant, however, 1,4,7-trithiacyclononane was also significant, especially on molecular sieves with larger pore openings and alumina. At elevated temperatures 2-methyl-1,3-dithiolane (a five-membered cyclic molecule) was also detected. This molecule was formed in the highest amount on HZSM-5 among the catalysts applied revealing that a more constrained environment is advantageous for this dimerisation type to occur.

Original languageEnglish
Pages (from-to)95-98
Number of pages4
JournalCatalysis Letters
Volume76
Issue number1-2
DOIs
Publication statusPublished - Sep 2001

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Aluminum Oxide
Molecular sieves
absorbents
sulfides
Ethylene
ethylene
Alumina
aluminum oxides
Oligomerization
Molecules
Dimerization
rings
Dimers
dimerization
trimers
Temperature
Catalysts
molecules
dimers
porosity

Keywords

  • 1,4,7-trithiacyclononane
  • 1,4-dithiane
  • 2-methyl-1,3-dithiolane
  • Acidic molecular sieves
  • Alumina
  • Cyclo-oligomerisation
  • Desulfurisation
  • Pulse system
  • Thiirane

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

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title = "Cyclodimerisation and cyclotrimerisation during the ring-opening reactions of ethylene sulfide (thiirane) over acidic molecular sieves and alumina",
abstract = "The Iransformations of ethylene sulfide were studied at three reaction temperatures (423, 473 and 523 K) on different acidic molecular sieves (HZSM-5, HY and AIMCM-41) and alumina in a pulse system. The main reaction pathways were found to be desulfurisation, cyclo-oligomerisation, the latter being more important. In this reaction channel mainly direct dimer (six-membered ring: 1,4-dithiane) and trimer (1,4,7-trithiacyclononane) formation occurred. The former product was always predominant, however, 1,4,7-trithiacyclononane was also significant, especially on molecular sieves with larger pore openings and alumina. At elevated temperatures 2-methyl-1,3-dithiolane (a five-membered cyclic molecule) was also detected. This molecule was formed in the highest amount on HZSM-5 among the catalysts applied revealing that a more constrained environment is advantageous for this dimerisation type to occur.",
keywords = "1,4,7-trithiacyclononane, 1,4-dithiane, 2-methyl-1,3-dithiolane, Acidic molecular sieves, Alumina, Cyclo-oligomerisation, Desulfurisation, Pulse system, Thiirane",
author = "Andr{\'a}s F{\'a}si and A. G{\"o}m{\"o}ry and I. P{\'a}link{\'o} and I. Kiricsi",
year = "2001",
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doi = "10.1023/A:1016759605883",
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pages = "95--98",
journal = "Catalysis Letters",
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T1 - Cyclodimerisation and cyclotrimerisation during the ring-opening reactions of ethylene sulfide (thiirane) over acidic molecular sieves and alumina

AU - Fási, András

AU - Gömöry, A.

AU - Pálinkó, I.

AU - Kiricsi, I.

PY - 2001/9

Y1 - 2001/9

N2 - The Iransformations of ethylene sulfide were studied at three reaction temperatures (423, 473 and 523 K) on different acidic molecular sieves (HZSM-5, HY and AIMCM-41) and alumina in a pulse system. The main reaction pathways were found to be desulfurisation, cyclo-oligomerisation, the latter being more important. In this reaction channel mainly direct dimer (six-membered ring: 1,4-dithiane) and trimer (1,4,7-trithiacyclononane) formation occurred. The former product was always predominant, however, 1,4,7-trithiacyclononane was also significant, especially on molecular sieves with larger pore openings and alumina. At elevated temperatures 2-methyl-1,3-dithiolane (a five-membered cyclic molecule) was also detected. This molecule was formed in the highest amount on HZSM-5 among the catalysts applied revealing that a more constrained environment is advantageous for this dimerisation type to occur.

AB - The Iransformations of ethylene sulfide were studied at three reaction temperatures (423, 473 and 523 K) on different acidic molecular sieves (HZSM-5, HY and AIMCM-41) and alumina in a pulse system. The main reaction pathways were found to be desulfurisation, cyclo-oligomerisation, the latter being more important. In this reaction channel mainly direct dimer (six-membered ring: 1,4-dithiane) and trimer (1,4,7-trithiacyclononane) formation occurred. The former product was always predominant, however, 1,4,7-trithiacyclononane was also significant, especially on molecular sieves with larger pore openings and alumina. At elevated temperatures 2-methyl-1,3-dithiolane (a five-membered cyclic molecule) was also detected. This molecule was formed in the highest amount on HZSM-5 among the catalysts applied revealing that a more constrained environment is advantageous for this dimerisation type to occur.

KW - 1,4,7-trithiacyclononane

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KW - Acidic molecular sieves

KW - Alumina

KW - Cyclo-oligomerisation

KW - Desulfurisation

KW - Pulse system

KW - Thiirane

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