Zn(II)–Cr(III) mixed oxide as efficient bifunctional catalyst for dehydroisomerisation of α-pinene to p-cymene

详细信息    查看全文

• 作者：Fahd Al-Wadaani ; Elena F. Kozhevnikova ; Ivan V. Kozhevnikov
• 关键词：α ; -Pinene ; p-Cymene ; Zn– ; Cr mixed oxide ; Bifunctional catalysis
• 刊名：Applied Catalysis A: General
• 出版年：2009
• 出版时间：1 July 2009
• 年：2009
• 卷：363
• 期：1-2
• 页码：153-156
• 全文大小：203 K

文摘

Zn(II)–Cr(III) mixed oxide possessing acid and dehydrogenation functions is an efficient, noble-metal-free catalyst for the one-step dehydroisomerisation of α-pinene to p-cymene. This reaction is a good example of the use of heterogeneous multifunctional catalysis for the conversion of renewable feedstock into value-added chemicals. It involves acid-catalysed α-pinene isomerisation followed by dehydrogenation of p-cymene precursor(s). The reaction is carried out over a fixed catalyst bed in the gas phase at 350 °C. Amongst Zn–Cr oxides studied (Zn/Cr = 20:1–1:30), the preferred catalyst is Zn–Cr (1:1) oxide which produces p-cymene with a 78 % yield at 100 % α-pinene conversion. This catalyst shows stable performance for over 30 h without co-feeding hydrogen to the reactor.