Journal of Porous Materials ( IF 2.5 ) Pub Date : 2021-04-10 , DOI: 10.1007/s10934-021-01078-0 Yadong Bai , Qinghu Zeng , Jinghui Sun , Qingfeng Song , Lei Tang , Wenwen Zhang , Zhiping Liu , Dahai Pan
In present work, bi-phases composite zeolites consisting of SAPO-5 and SAPO-34 (named as SSC) are prepared by a traditional hydrothermal way, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption–desorption, intelligent gravimetric analyzer (IGA), intrusive mercury technology, and NH3-TPD techniques. The results display that the crystals in the as-synthesized composites have a hierarchical pore system with a size of about 3–130 nm, which displays a butterfly-like pattern on the crystal faces and runs throughout the whole crystal. Catalytic performances of the as-synthesized SSC catalysts are tested during methanol to olefin (MTO). As compared with a microporous composite catalyst, the hierarchical SSC composite catalyst displays excellent catalytic performances with a prolonged catalytic life and an elevated selectivity for light olefins.
中文翻译:
SAPO-5和SAPO-34组成的复合沸石的合成及其在甲醇脱水制轻烯烃中的应用
在目前的工作中,由SAPO-5和SAPO-34组成的双相复合沸石(称为SSC)是通过传统的水热法制备的,并通过X射线衍射(XRD),扫描电子显微镜(SEM),N 2吸附-解吸,智能重量分析仪(IGA),侵入式汞技术和NH 3-TPD技术。结果表明,合成后的复合材料中的晶体具有大约3–130 nm的分级孔隙系统,该晶体系统在晶体表面显示蝴蝶状图案,并贯穿整个晶体。在甲醇制烯烃(MTO)期间测试了合成后的SSC催化剂的催化性能。与微孔复合催化剂相比,分级SSC复合催化剂显示出优异的催化性能,具有延长的催化寿命和提高的对轻烯烃的选择性。