Gas Phase Epoxidation of Propylene with TS-1 and in Situ H₂O₂ Produced by a H₂/O₂ Plasma

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• 作者：Ji SU^a ; Juncheng ZHOU^a ; ^b ; Chunyan LIU^a ; Xiangsheng WANG^a ; Hongchen GUO^a ; ^{hongchenguo@163.com"" rel=""nofollow}
• 关键词：plasma ; hydrogen peroxide ; titanium silicalite-1 ; gas-phase epoxidation of propylene ; propylene oxide
• 刊名：Chinese Journal of Catalysis
• 出版年：2010
• 出版时间：2010
• 年：2010
• 卷：31
• 期：9-10
• 页码：1195-1199
• 全文大小：253 K

文摘

Gas phase epoxidation of propylene was performed by directly contacting propylene and gaseous H₂O₂ on the surface of TS-1 catalyst in an integrated reactor. The gaseous H₂O₂ was produced in situ by a H₂/O₂ plasma. The H₂O₂ formation rate can be enhanced by increasing the power density of the H₂/O₂ plasma reactor. The yield and selectivity for propylene oxide (PO) can be increased by optimizing the reaction conditions and using suitable TS-1 catalysts. With a power injection of 3.5 W, flow rates of H₂, O₂, and propylene of 170, 8, and 18 ml/min, respectively, catalyst loading of 0.8 g, and epoxidation temperature of 110 °C, the yield and selectivity for PO and the utilization rate of H₂O₂ were 246.9 g/(kg·h), 95.4 % , and 36.1 % , respectively. During the gas phase reaction, no decline of TS-1 activity was observed.