Liquid-solid mass transfer in a tubular reactor with solid foam packings

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• 作者：Iman Mohammed^a ; ^{Iman.Mohammed1@mailbox.tu-dresden.de" class="auth_mail} ; Tobias Bauer^a ; Markus Schubert^b ; Rü ; diger Lange^a ; ^{ruediger.lange@tu-dresden.de" class="auth_mail}
• 关键词：Solid foam ; Liquid&ndash ; solid mass transfer ; Electrochemical method ; Pre-wetting mode ; Packed-bed reactor ; Multiphase reactor
• 刊名：Chemical Engineering Science
• 出版年：28 April, 2014
• 年：2014
• 卷：108
• 期：Complete
• 页码：223-232
• 全文大小：1196 K

文摘

Catalytically active open-cell solid foam packings are promising replacements for conventional randomly packed catalyst particles due to their low pressure drop and high specific surface area. The liquid-solid mass transfer was studied with a modified electrochemical limiting diffusion current method for different packings and flow rates. The effective liquid-solid mass transfer coefficients () were determined at two different axial packing positions. In particular, the effects of gas and liquid superficial velocities and the pre-wetting modes of the packing (LEVEC and KAN-LIQUID) were researched. The results reveal that higher liquid superficial velocity increases the liquid-solid mass transfer, while increasing foam pore density lowers the mass transfer rate. The strong multiplicity behavior known from the hydrodynamic study of was not obtained for the liquid-solid mass transfer. However, the type of liquid distributor providing the initial irrigation pattern had a significant effect on the effective liquid-solid mass transfer coefficient. A new correlation is proposed to predict the effective liquid-solid mass transfer coefficient.