摘要
The effects of ultrasound irradiation on SAPO-34 molecular sieve synthesis are investigated for improving its catalytic performance in MTO (Methanol to olefin). The molecular sieve samples are characterized with XRD, SEM, FT-IR, and DTG techniques. XRD results show that the crystallization rate and the crystallinity of SAPO-34 increase apparently after ultrasound irradiation. SEM results show that the crystal size becomes smaller and the size distribution becomes narrower after ultrasound irradiation. Ultrasonic-wave treatment is effective in improving the thermal stability of SAPO-34 molecular sieve. MTO catalytic reaction shows that the SAPO-34 molecular sieve of smaller crystal size has higher selectivity to ethylene and propylene.
源语言 | 英语 |
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页(从-至) | 528-532 |
页数 | 5 |
期刊 | Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology |
卷 | 31 |
期 | 4 |
出版状态 | 已出版 - 8月 2007 |