Kinetics of homogeneous 5‐hydroxymethylfurfural oxidation to 2,5‐furandicarboxylic acid with Co/Mn/Br catalyst |
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| Authors: | Xiaobin Zuo Amit S Chaudhari Kirk Snavely Fenghui Niu Hongda Zhu Kevin J Martin Bala Subramaniam |
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| Affiliation: | 1. Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, KS;2. Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, KS;3. Dept. of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS;4. Archer Daniels Midland (ADM) Company, Decatur, IL |
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| Abstract: | 2,5‐furandicarboxylic acid (FDCA) is a potential non‐phthalate based bio‐renewable substitute for terephthalic acid‐based plastics. Herein, we present an investigation of the oxidation rate of 5‐hydroxymethylfurfural (HMF) to FDCA in acetic acid medium using Co/Mn/Br catalyst. Transient concentration profiles of the reactant (HMF), intermediates 2,5‐diformylfuran (DFF), 5‐formyl‐2‐furancarboxylic acid (FFCA)], and the desired product (FDCA) were obtained for this relatively fast reaction in a stirred semi‐batch reactor using rapid in‐line sampling. Comparison of the effective rate constants for the series oxidation steps with predicted gas–liquid mass transfer coefficients reveals that except for the FFCA → FDCA step, the first two oxidation steps are subject to gas–liquid mass transfer limitations even at high stirrer speeds. Novel reactor configurations, such as a reactor in which the reaction mixture is dispersed as fine droplets into a gas phase containing oxygen, are required to overcome oxygen starvation in the liquid phase and further intensify FDCA production. © 2016 American Institute of Chemical Engineers AIChE J, 63: 162–171, 2017 |
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| Keywords: | 5‐hydroxymethylfurfural 2 5‐furandicarboxylic acid Co/Mn/Br catalyst oxidation semi‐batch reactor model |
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