Hydrodenitrogenation of indole over NiMo sulfide catalysts
- Ohio State Univ., Columbus, OH (United States)
Indole HDN has been investigated over sulfided Ni-Mo catalysts in a vapor phase flow reactor. Experiments were performed in a wide range of temperatures and feed concentrations to study the role of o-ethylaniline (OEA), and the effect of the Ni promoter and sulfur compounds in the reaction network. Subsequent to the hydrogenation of the heterocyclic ring in a reversible step which leads to indoline formation, two major pathways were proposed, accounting for the formation of ethylcyclohexane and ethylbenzene, the two main HDN products of indole. One was from the hydrogenolysis of indoline to OEA and the other from the hydrogenation of the benzene ring of indoline. Although somewhat inhibited by the presence of indole/indoline, the reaction of OEA was found to be a significant route. The role of Ni was shown to be the promotion of the hydrogenation steps in indole HDN. The effect of sulfur compounds was especially pronounced on the product distribution, by selectively enhancing the hydrogenolysis steps. The product distribution and the inhibition/enhancement effects were found to be strong functions of the reaction temperature.
- OSTI ID:
- 468034
- Report Number(s):
- CONF-960652--
- Country of Publication:
- United States
- Language:
- English
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