Introduced amethod of synthesizing hierarchical EU-1 zeolitewith organosilanes as additive

and studied the influences of following different kinds of organosilanes on the synthesis of hierarchical EU-1 zeolite:γ-glycidoxy propyl trimethoxy silane (GPTMS)

N-β-(aminoethyl)-γ-aminopropyl methyl dimethoxyl silane (APAEDMS)

and N-(β-aminoethyl)-γ-aminopropyl dimethoxyl (ethyoxyl) silane (TMPED). The hierarchical EU-1 samples were characterized by XRD

SEM

N

2

adsorption

FT-IR and NH

3

-TPD to analyze the crystallinity

morphology

surface area

pore size distribution and acidity. The results showed that hierarchical EU-1 zeolites were successfully synthesized; organosilanes have great influence on crystal morphology of EU-1 zeolites; the exterior surface area of hierarchical EU-1 zeolite

which synthesized with organosilanes (APAEDMS) adding into synthesis system

increased by 62.1% andmesopore volume increased by 129.1% comparedwith conventional EU-1 zeolites

thus can reduce the diffusional restriction markedly in catalytic reaction. The catalytic performance of hierarchical EU-1 zeolites were evaluated in m-xylene isomerization on fixed bed reactor. The catalytic data showed that the isomerization activity PX/X o

f the hierarchical EU-1 zeolites reached around 24.09% in theoretical thermodynamic equilibrium from 23.83%

and the selectivity of C

8

aromatic hydrocarbon increased from 75.16% to 84.87%. The conversion of p-xylene increased from 16.30% to 18.41%.