Enhancement of the Liquid-Side Mass Transfer in a Falling Film Catalytic Microreactor by In-Channel Mixing Structures

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• 作者：Evgeny V. Rebrov ; Thijs Duisters ; Patrick L?b ; Jan Meuldijk ; Volker Hessel
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：July 4, 2012
• 年：2012
• 卷：51
• 期：26
• 页码：8719-8725
• 全文大小：343K
• 年卷期：v.51,no.26(July 4, 2012)
• ISSN：1520-5045

文摘

Catalytic octanal oxidation with oxygen was performed at 100 掳C and the total pressure of 5 and 10 bar in a falling film microreactor with varying reaction plates bearing different in-channel mixing structures. The liquid flow rate was changed in the range of 3.3鈥?7.5 mL/min. The liquid-sided mass transfer over grooved or finned structured plates was enhanced by factors of 1.12 and 1.20, respectively, compared to that on a standard plate with 16 microchannels with dimensions of 1200 渭m 脳 400 渭m. The liquid flow rate over the structured plates could be increased by 60%鈥?0% without any loss of octanal conversion. A two-dimensional convection and diffusion model adopted from Al-Rawashdeh et al. [Chem. Eng. Sci. 2008, 63, 5149] was formulated to simulate the reactor behavior, and its predictions describe the experimental results in terms of octanal conversion with an accuracy of 4.3% when the actual temperature distribution in the reactor plate is taken into account.