The new hierarchy: c‐TUD‐1, a new aluminosilicate with a hierarchicalmicro/mesoporousstructure, has been successfully synthesized by a steam‐assisted post‐crystallization process. c‐TUD‐1 has large pore size and volume, high surface area, high acid concentration/strength, and high hydrothermal stability, and demonstrates significantly higher activity than either amorphous aluminosilicate or bulky
A new type of hierarchically porous ZSM-5-type zeolite, Hp-ZSM, with well defined macro-/meso-/microporous structures was facilely synthesized via a simple steam-assisted conversion route in the presence of ethanol. This novel material exhibits a tri-modal porous structure: a macroporous network with macropore sizes of 50–200 nm; a well defined mesoporous structure of pore size around 2.5 nm in the macroporous framework and a typical microporous ZSM-5 structure in the mesoporous framework. A micro-emulsion mechanism was proposed for the formation of the macroporosity where ethanol is assumed to form ‘oil’ droplets in the water phase in the presence of surfactants.
Partially decomposed PCA can be assembled with small-sized nanoblocks to synthesize hierarchical ZSM-5, but is difficult to assemble with large-sized zeolite seeds.
部分分解的PCA可以与小型纳米块组装在一起,以合成分层ZSM-5,但很难与大型沸石种子组装在一起。
PAVLOV L. P.; MIXANTEV B. I., VORONEZH. YH-T, VORONEZH, 1977, 5 S.,