1. Novel regeneration method of Pt/KL zeolite catalyst for light naphtha reforming
- Author
-
Michio Sugimoto, Takashi Murakawa, Tomoaki Hirano, and Hiroshi Ohashi
- Subjects
Chemistry ,Process Chemistry and Technology ,Inorganic chemistry ,Aromatization ,Sintering ,chemistry.chemical_element ,Coke ,Catalysis ,chemistry.chemical_compound ,Chlorotrifluoromethane ,Platinum ,Zeolite ,Naphtha - Abstract
We have found that the treatment of KL zeolite with chlorotrifluoromethane (CF3Cl) increased the catalytic activity for the aromatization of C6 feedstock. Regeneration of the used platinum catalyst supported on the CF3Cl-treated KL zeolite (Pt/FKL) was studied. Deactivation of the Pt/FKL was caused by sintering of the platinum particles, loss of halogen atoms and coke formation during aromatization of the C6 feedstock. It was found that the catalyst performance of the Pt/FKL was restored by decoking in flowing 0.005% CCl4+2% O2+97.995% N2from room temperature to 773 K, followed by treatment in flowing 0.8% freon 112+10% O2+89.2% N2at 773 K. From the results of the IR spectra of chemisorbed CO and terminal OH groups, it is suggested that the most important goal of regenerating the used Pt/FKL is to redisperse the platinum particles and restore their electronic state.
- Published
- 1993
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