以EU-1分子筛为晶种合成ZSM-11分子筛及其表征

以EU-1分子筛为异质晶种，以不同模板剂和硅源合成了两种不同粒度尺寸的ZSM-11分子筛。采用XRD，FT-IR，SEM，N2吸附-脱附等手段对合成的ZSM-11分子筛样品进行表征。结果表明，晶种加入量在1%~10％，一定温度下水热晶化处理1~10天，均可以得到结晶度高、无杂晶的ZSM-11分子筛。采用不同方法合成的两种ZSM-11分子筛在形貌及晶粒尺寸上存在较明显区别，微米尺寸的ZSM-11分子筛呈现椭球状，由许多板条状粒子团聚而成，尺寸约为200 nm×700 nm；纳米尺寸的ZSM-11分子筛呈现清晰的球状晶体，是许多球状纳米级粒子团聚形成的，粒径在100 nm以下。

SYNTHESIS AND CHARACTERIZATION OF ZEOLITE ZSM-11 USING ZEOLITE EU-1 AS HETEROGENOUS CRYSTAL SEED

With zeolite EU-1 as heterogenous crystal seed,two ZSM-11 zeolite samples having different crystal sizes were synthesized by using different synthesis methods,templates and silicon sources.The prepared ZSM-11 samples were characterized by XRD,FT-IR,SEM,N2 adsorption-desorption and so on.The influence of the adding amount of heterogenous crystal seed was studied.Results showed that zeolite ZSM-11 with high crystallinity could be obtained when using 1%—10% heterogenous crystal seed and crystallization under a certain temperature for 1—10 days.The characterization results showed that the morphologies and crystal size of ZSM-11 samples synthesized by different methods were varied:one exhibited as spherical nanometer crystals with particle size under 100 nm,and another was elliptic globosity micron crystals(200 nm×700 nm)having large mesoporous structure,which was agglomerated by panel particles.Furthermore,the SiO2/Al2O3 ratios of these two samples varied significantly as well,the nanometer sample was lower and the micron one was higher.