Selective decomposition of hydrogen peroxide in the epoxidation effluent of the HPPO process

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• 作者：Gema Blanco-Brieva^a ; M. Pilar de Frutos-Escrig^b ; Hilario Martí ; n^b ; Jose M. Campos-Martin^a ; Jose L.G. Fierro^a ; ^{jlgfierro@icp.csic.es}
• 关键词：Epoxidation ; Hydrogen peroxide ; Decomposition ; HPPO
• 刊名：Catalysis Today
• 出版年：2012
• 期刊代码：13_09205861
• 类别：ce
• 出版时间：30 June, 2012
• 卷：187
• 期：1
• 页码：168-172
• 文件大小：298 K

摘要

This work describes the selective H₂O₂ decomposition in the exit stream of the epoxidation reactor employed in the Hydrogen Peroxide-Propylene Oxide (HPPO) process. Pd/Al₂O₃ and Pt/Al₂O₃ catalysts were tested. The effects of the reaction temperature and the pH of the solution on catalyst performance were investigated. It was found that the Pt catalyst is much more active than its Pd counterpart. An increase in the temperature and the pH of the solution resulted in an increase in the H₂O₂ decomposition rate; however, a parallel increase of by-products from PO was also observed. Working with a Pt/Al₂O₃ catalyst under optimized reaction conditions (333 K, pH = 7), hydrogen peroxide can be completely decomposed at reaction times of 120 min with no by-products produced from propylene oxide.