关键词: 催化重整, 重质原料, 催化剂, 硼硅分子筛

Abstract: The synthesis of borosilicate zeolite was studied in the system Na₂O-TEAOH-B₂O₃-SiO₂-H₂O by hydrothermal crystallization with different synthesis conditions. Catalysts with borosilicate zeolite as support were prepared and their catalytic performances for reforming reaction were evaluated for heavy hydrocarbon feed. The results show that the template amount and SiO₂/B₂O₃ ratio in synthesis mixture play a key role in the crystal form of the zeolite, and borosilicate β zeolite (Bβ) with high crystallinity can be synthesized under proper synthesis conditions. When n-tridecane is used as the model compound, the Pt/Bβcatalyst shows better aromatization performance. Compared with PR-D catalyst, Pt/Bβcatalyst shows higher BTX and naphthalene yields and lower C₉+ aromatics yield. Treating heavy feed by Pt/Bβcatalyst, the reaction pressure should not be too low; moreover, higher reaction temperature and lower WHSV are beneficial for the formation of BTX.

Key words: catalytic reforming, heavy feed, catalyst, borosilicate zeolite