期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 6, 期 21, 页码 7852-7859出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cy00867d
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资金
- KACST [13-NAN1702-04]
- SABIC
Aluminum-rich H-ZSM-5 zeolites modified with alkaline earth metal oxides of Mg, Ca and Ba were applied in the conversion of methanol to olefins (MTO). The pores of the parent H-ZSM-5 zeolite were blocked with a surfactant prior to metal oxide modification. The resulting Mg-ZSM-5, Ca-ZSM-5 and Ba-ZSM-5 exhibited similar structural and morphological patterns to the parent H-ZSM-5. The addition of these alkaline metal oxides affected the acidity of the ZSM-5-based catalysts. Mg-ZSM-5 was found to be the most stable in the MTO reaction, maintaining a conversion of 100% for over 8 h and having the highest selectivity of ca. 46% to propylene due to the presence of weak Bronsted acidity.
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