Reaction Performance of Hydrogen from Aqueous-Phase Reforming of Methanol or Ethanol in Hydrogenation of Phenol

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• 作者：Yizhi Xiang ; Xiaonian Li ; Chunshan Lu ; Lei Ma ; Junfeng Yuan ; Feng Feng
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：March 16, 2011
• 年：2011
• 卷：50
• 期：6
• 页码：3139-3144
• 全文大小：807K
• 年卷期：v.50,no.6(March 16, 2011)
• ISSN：1520-5045

文摘

Reaction performances of hydrogen generated from aqueous-phase reforming (APR) of methanol or ethanol were investigated in hydrogenation of phenol, o-cresol and p-tert-butylphenol, over a Raney Ni or Pd/Al₂O₃ catalyst, respectively. The properties of the adsorbed hydrogen from aqueous-methanol/-ethanol, and H₂-gas were studied by means of temperature-programmed surface reaction in liquid phase and temperature-programmed desorption. The results shown that the selectivities of cyclohexanone are 20.5% and 96.1%, 27.4% and 92.4%, and 12.6% and 71.1% in the hydrogenation of phenol with hydrogen from APR of methanol, APR of ethanol, and H₂-gas over the Raney Ni and Pd/Al₂O₃ catalyst, respectively. The limited amount of adsorbed hydrogen from the APR of methanol or ethanol favors the formation of cyclohexanone, but excessive amounts of adsorbed hydrogen from H₂-gas favors the formation of cyclohexanol in hydrogenation of phenol.