Moving from Batch to Continuous Operation for the Liquid Phase Dehydrogenation of Tetrahydrocarbazole

详细信息    查看全文

• 作者：Yan Shen ; Azman Maamor ; Jehad Abu-Dharieh ; Jillian M. Thompson ; Bal Kalirai ; E. Hugh Stitt ; David W. Rooney
• 刊名：Organic Process Research & Development
• 出版年：2014
• 出版时间：March 21, 2014
• 年：2014
• 卷：18
• 期：3
• 页码：392-401
• 全文大小：407K
• 年卷期：v.18,no.3(March 21, 2014)
• ISSN：1520-586X

文摘

Despite the numerous advantages of continuous processing, high-value chemical production is still dominated by batch techniques. In this paper, we investigate options for the continuous dehydrogenation of 1,2,3,4-tetrahydrocarbazole using a trickle bed reactor operating under realistic liquid velocities with and without the addition of a hydrogen acceptor. Here, a commercial 5 wt % Pd/Al₂O₃ catalyst was observed to slowly deactivate, hence proving unsuitable for continuous use. This deactivation was attributed to the strong adsorption of a byproduct on the surface of the support. Application of a base washing technique resolved this issue and a stable continuous reaction has been demonstrated. As was previously shown for the batch reaction, the addition of a hydrogen acceptor gas (propene) can increase the overall catalytic activity of the system.