Abstract: Hierarchical ferrierite (FER) assemblies with a ball-shaped morphology were synthesized successfully employing pyrrolidine and tetramethlammonium hydroxide (TMAOH) as cooperative structure directing agents.The effect of the amounts of TMAOH on the crystallization, crystallization curve, morphology and textural properties of the products were investigated.The products were characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption/desorption.The results show that the more the TMAOH, the longer the crystallization process is, but the reletive crystallization are always similar.When TMAOH was adding to the gel, the products not only have a significant change of morphology (from plant-like to ball-shaped) but also a more mesopore volume, higher hierarchical factor.

Key words: Hierarchical ferrierite (FER) assemblies with a ball-shaped morphology were synthesized successfully employing pyrrolidine and tetramethlammonium hydroxide (TMAOH) as cooperative structure directing agents.The effect of the amounts of TMAOH on the crystallization, crystallization curve, morphology and textural properties of the products were investigated.The products were characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption/desorption.The results show that the more the TMAOH, the longer the crystallization process is, but the reletive crystallization are always similar.When TMAOH was adding to the gel, the products not only have a significant change of morphology (from plant-like to ball-shaped) but also a more mesopore volume, higher hierarchical factor.