Abstract: By means of adopting new promoters and preparation procedures to adjust the acidic and metallic active centers of CCR catalyst, a low coke deposition and high selective PS-VI catalyst was developed by Research Institute of Petroleum Processing. Compared with the previous PS-V catalyst, PS-VI catalyst showed a 21% decrease in coke deposition, yet its yields of reformate and aromatics increased. Based on these experiences, by optimizing the interaction between promoters and Pt centers to further adjust the microstructure and the ratio of two kinds of Pt centers, PS-VII catalyst was obtained and commercialized. The application results showed that the coke deposition of PS-VII catalyst decreased by 36% as compared with reference catalyst, at the same time, the yields of reformate, aromatics and hydrogen increased significantly.

Key words: catalytic reforming, catalyst, gasoline , aromatic hydrocarbon , coke deposit