BY分子筛的合成、表征及其裂化性能考察

采用水热晶化法合成了含杂原子硼的Y型分子筛，利用MAS NMR、XRD、IR等表征方法，证明了硼进入Y型分子筛的骨架中。利用吡啶吸附红外光谱、轻油微反装置分别测定了Y和BY分子筛的表面酸性及其裂化性能。结果表明，硼的引入增加了Y分子筛的B酸中心数目以及裂化和氢转移反应活性，导致裂化汽油中的烯烃明显降低，芳烃随之增加。

Synthesis, characterization and catalytic performance of heteroatom substituted zeolite BY

The heteroatom substituted zeolite BY was synthesized in the process of hydrothermal synthesis of zeolite Y with some aluminium source substituted by boron source.The crystalline structure,surface acidity and catalytic properties of zeolite BY were characterized by X-ray diffraction(XRD),infrared spectroscopy(IR),nuclear magnetic resonance(NMR),pyridine-IR and micro-reaction activity test(MAT).The results showed that boron was incorporated into the framework of zeolite Y and the crystallinity of zeolite BY with an appropriate amount of boron incorporated was improved.The Bronsted acid sites were increased and subsequently the Lewis acid sites were decreased with the introduction of boron.The catalytic activity of zeolite BY for cracking and hydrogen transfer reaction was enhanced,the olefin in the cracking gasoline was decreased and the aromatic hydrocarbons were increased.Thus BY zeolite is an ideal active component for the olefin-reducing FCC catalyst.