关键词:

梯度孔, 组装, 前驱体, 双重模板

Abstract:

A series of hydrothermally stable composites with graded pores were synthesized via insitu assembly of zeolite Y precursors by carbon black/P123 templatesThe graded composites were characterized by means of XRD, FT-IR, TEM, BET and NH_3-TPDThe results of FT-IR showed that the primary and secondary structural building units of zeolite Y were introduced into the wall of zeolitesThe results of BET and TEM suggested that the composites had interconnected hierarchical pore structure (0.39 nm-3.8 nm-6.5 nm-19.9 nm).The surface area and pore volume were 693 m²·g^-1 and 1.89 ml·g^-1 respectivelyAfter hydrothermal treatment at 100% steam, 800℃ for 2 h and 4 h, the remaining fractions of surface area were 80.1% and 35.1% respectively, while the remaining fractions of pore volume were 45.0% and 25.4% respectivelyThe present paper provides a novel route for fabricating materials with graded pores and high hydrothermal stability which are candidates for heavy oil cracking catalysts.

Key words:

梯度孔, 组装, 前驱体, 双重模板