| Popis: |
In the aromatization of C 6 feedstock, the platinum catalyst supported on the CF 3 cl-treated KL zeolite (Pt/FKL) exhibits a high stability even at a low H 2 /C 6 mole ratio of 0.5 and a high aromatization activity, compared with the untreated catalyst (Pt/KL). The results of co-FT-IR and 129 Xe NMR show that the platinum particles on the Pt/FKL are rich in electrons, compared with those on Pt/KL and that most of the Pt particles on both catalysts are located on the external surfaces. Therefore, it is thought that the electronic state of platinum particles affects more significantly the catalytic activity than the channel structure of the L-zeolites. |
