Modification of Hβ zeolite by fluorine and its influence on olefin alkylation thiophenic sulfur in gasoline

By modifying the Hβ zeolite with proper amount HF, the catalytic performance of fluorinated Hβ was obviously improved for the olefin alkylation thiophenic sulfur process. Particularly, the acid sites of the fluorinated Hβ catalysts were increased, especially its distribution of medium and stronger Lewis and Brönsted acid sites was optimized, and its thiophene alkylation activity and stability are thus promoted as well as its coking behavior is suppressed during OATS process.