Adsorption and surface reactions of thiophene on ZSM5 zeolites

Journal Article · Thu Mar 19 04:00:00 EST 1992 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100185a050· OSTI ID:263249

Garcia, C L; Lercher, J A ^[1]

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1. Institut fuer Physikalische Chemie und Christian Doppler Laboratorium fuer Heterogene Katalyse, Vienna (Austria)

The adsorption and surface chemistry of thiophene on Na-, K-, and H-ZSM5 were studied by means of IR spectroscopy, mass spectrometry, and gravimetry. On hydroxyl groups, thiophene is reversibly absorbed at room temperature via hydrogen bonding. On acid hydroxyl groups (strong Broensted acid sites) ring opening and oligomerization were observed for longer exposures, indicating that these processes are relatively slow. The main primary products resulting from ring opening were concluded to be unsaturated thiol-like species. These species may undergo cracking while the fragments may rearrange to give various aromatic sulfur (and to a smaller extent sulfur free) compounds. The results indicate easy formation and breaking of sulfur carbon bonds on acidic zeolite catalysts. 30 refs., 11 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 263249
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 6 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
02 PETROLEUM
40 CHEMISTRY
ABSORPTION SPECTROSCOPY
ADSORPTION
BROENSTED ACIDS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CRACKING
GRAVIMETRY
ISOMERIZATION
MASS SPECTROSCOPY
THIOPHENE
ZEOLITES