引用本文:
Wei Guo CHENG, Xiang Sheng WANG, Gang LI, Xin Wen GUO, Qing Song LIN. Highly Effective Propylene Epoxidation over TS-1/SiO2 Hydrothermally Treated[J]. Chinese Chemical Letters,
2005, 16(1): 103-106.
Citation: Wei Guo CHENG, Xiang Sheng WANG, Gang LI, Xin Wen GUO, Qing Song LIN. Highly Effective Propylene Epoxidation over TS-1/SiO2 Hydrothermally Treated[J]. Chinese Chemical Letters, 2005, 16(1): 103-106.
Citation: Wei Guo CHENG, Xiang Sheng WANG, Gang LI, Xin Wen GUO, Qing Song LIN. Highly Effective Propylene Epoxidation over TS-1/SiO2 Hydrothermally Treated[J]. Chinese Chemical Letters, 2005, 16(1): 103-106.
Highly Effective Propylene Epoxidation over TS-1/SiO2 Hydrothermally Treated
摘要:
The propylene epoxidation over TS-1/SiO2 catalyst hydrothermally treated was investigated. It was found by EPR characterization that two types of Ti (Ⅳ)-superoxide radicals,A (gz=2.0271; gy=2.0074; gx=2.0010) and B (gz=2.0247; gy=2.0074; gx=2.0010), were observed for TS-1/SiO2. The superoxo species A converted to B after TS-1/SiO2 catalyst was hydrothermally treated. The results show that over TS-1/SiO2 catalyst hydrothermally treated at 170℃, about 95% conversion of H2O2 with above 94% PO selectivity is obtained during continuous running for 300 h under the conditions of reaction temperature 45℃, 0.5 h-1 WHSV of propylene.
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关键词:
- Hydrothermal
- / TS-1/SiO2
- / propylene epoxidation
- / EPR
- / radical.
English
Highly Effective Propylene Epoxidation over TS-1/SiO2 Hydrothermally Treated
Abstract:
The propylene epoxidation over TS-1/SiO2 catalyst hydrothermally treated was investigated. It was found by EPR characterization that two types of Ti (Ⅳ)-superoxide radicals,A (gz=2.0271; gy=2.0074; gx=2.0010) and B (gz=2.0247; gy=2.0074; gx=2.0010), were observed for TS-1/SiO2. The superoxo species A converted to B after TS-1/SiO2 catalyst was hydrothermally treated. The results show that over TS-1/SiO2 catalyst hydrothermally treated at 170℃, about 95% conversion of H2O2 with above 94% PO selectivity is obtained during continuous running for 300 h under the conditions of reaction temperature 45℃, 0.5 h-1 WHSV of propylene.
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Key words:
- Hydrothermal
- / TS-1/SiO2
- / propylene epoxidation
- / EPR
- / radical.
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