Direct synthesis of propylene oxide using hydrogen peroxide in a membrane reactor

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• 作者：Yu Guo ; Yujia Jin ; Hongmei Wu ; Dongxin Li ; Xianfeng Fan ; Lidai Zhou…
• 关键词：Membrane reactor ; Propylene oxide ; Epoxidation ; Titanium silicalite ; 1 ; Hydrogen peroxide
• 刊名：Chemical Papers
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：71
• 期：1
• 页码：49-57
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering; Biochemistry, general; Medicinal Chemistry; Materials Science, general; Biotechnology;
• 出版者：Springer International Publishing
• ISSN：1336-9075
• 卷排序：71

文摘

The epoxidation of propylene to propylene oxide (PO) with hydrogen peroxide was carried out in a titanium silicalite-1 (TS-1) catalytic membrane reactor. The TS-1 catalytic membrane with a thickness of 4–5 μm was fabricated on a tubular porous α-Al₂O₃ substrate. The structure and morphology of the membranes were characterized by scanning electron microscope, X-ray diffractometer, FT-IR, and a UV–vis spectrometer. Reaction conditions including temperature, pressure and H₂O₂ concentration were investigated for their effects on H₂O₂ conversion, PO selectivity and PO formation rate. The PO formation rate on the TS-1 catalytic membrane is more than twice as high as that on the TS-1 powder catalyst. Moreover, the regeneration tests of the TS-1 membrane reactor showed that the catalytic membrane kept relatively stable H₂O₂ conversion of and PO selectivity for eight reactions.