A wall-coated catalytic capillary microreactor for the direct formation of hydrogen peroxide |
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| Authors: | Jeck Fei Ng Yuntong Nie Gaik Khuan Chuah Stephan Jaenicke |
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| Affiliation: | 1. Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ve?na pot 113, 1000 Ljubljana, Slovenia;2. Measurement Technology Unit, University of Oulu, Kehräämöntie 7, 87400 Kajaani, Finland;1. Department of Chemical and Biological Engineering, University of Alabama, Tuscaloosa, AL 35487, USA;2. Nalco Champion, An Ecolab Company, Sugar Land, TX 77478, USA;3. Anadarko Petroleum Corporation, The Woodlands, TX 77380, USA;4. Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, NY 11201, USA;1. Industrial Chemistry and Reaction Engineering, Process Chemistry Center (PCC), Department of Chemical Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland;2. Technical Chemistry, Department of Chemistry, Chemical-Biochemical Centre (KBC), Umeå University, SE-90187 Umeå, Sweden;3. Dipartmento di Chimica and NIS Interdepartmental Centre, Università degli Studi di Torino, Via Pietro Giuria 7, Torino, Italy;4. Analytical Chemistry, Process Chemistry Center (PCC), Department of Chemical Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland;1. Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India;2. Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi 502285, India;3. Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India;4. Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India;1. Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;2. Unité de Catalyse et de Chimie du Solide, UMR 8181 CNRS, Bât. C3, Université Lille, ENSCL, Ecole Centrale de Lille, 59655 Villeneuve d’Ascq, France |
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| Abstract: | The direct formation of hydrogen peroxide from H2 and O2 was successfully carried out in a capillary microreactor at room temperature and atmospheric pressure. A key element in sustaining the activity of the catalyst is the incarceration of the palladium nanoparticles in a cross-linkable amphiphilic polystyrene-based polymer, prepared following the protocol of Kobayashi R. Akiyama, S. Kobayashi, J. Am. Chem. Soc. 125 (2003) 3412–3413]. The immobilization effectively reduced the leaching of palladium under acidic conditions. Applying the catalyst as a coating on the inner walls of a capillary enabled the sustained production of 1.1% hydrogen peroxide over at least 11 days. The highest catalyst utilization in a 2 mm capillary reactor was 0.54 molH2O2/h gPd. When the inner diameter of the reactor capillary was reduced to 530 μm, the rate was enhanced fourfold to 2.28 molH2O2/h gPd corresponding to a turnover frequency of 0.067 s?1. |
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