Regeneration of WO_x/Al₂O₃ and MoO_x/Al₂O₃ catalyst used during skeletal isomerization of 1-butene

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• 作者：Benitez ; Viviana M. ; Fí ; goli ; Nora S.
• 关键词：WO_x/Al₂O₃ ; MoO_x/Al₂O₃ ; Deactivation ; Regeneration ; n-butene isomerization
• 刊名：Catalysis Communications
• 出版年：2003
• 期刊代码：12_15667367
• 类别：ce
• 出版时间：November, 2003
• 卷：4
• 期：11
• 页码：571-577
• 文件大小：197 K

摘要

The regeneration of W and Mo supported on γ and α–θAl₂O₃ catalysts used during 1-butene skeletal isomerization, was studied. The regenerated catalysts were characterized by several techniques and the results compared with those of the fresh catalysts. It was found that it is necessary a 15 h at 465 °C treatment to completely eliminate coke on W/γA and Mo/γA, both catalysts recovering the initial activity and selectivity. Using this procedure, the properties of the catalysts were not modified. The same treatment did not allow the activity recovery in W/α–θA, due to differences in the nature of coke, that is aromatic or pregraphitic, and could not be totally removed.