Photo from wikipedia
A successful incorporation of boron into (star)BEA zeolite framework has been achieved using a in situ hydrothermal synthesis in the presence of aluminum-(star)BEA seeds. Interestingly, the boron-(star)BEA crystals exhibited a… Click to show full abstract
A successful incorporation of boron into (star)BEA zeolite framework has been achieved using a in situ hydrothermal synthesis in the presence of aluminum-(star)BEA seeds. Interestingly, the boron-(star)BEA crystals exhibited a cubic morphology with a remarkable decrease in the crystal size as compared with Al-(star)BEA seeds. The effect of boron addition on (star)BEA zeolite acidity was investigated by NH3-TPD and pyridine FTIR. The type of boron coordination in the framework of (star)BEA zeolite was observed by B-11 MAS NMR. The results confirmed the formation of tetrahedral (BO4) and trigonal (BO3) boron species. The catalyst with highest boron content (Si/B = 6) showed the best catalytic transformation of methanol to olefins and the lowest deactivation rate. Moreover, it showed the highest propylene selectivity of 60% as well as the highest propylene-to-ethylene ratio (P/E) of 7.5.
Journal Title: Microporous and Mesoporous Materials
Year Published: 2019
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!