Effect of reaction conditions on hydrothermal degradation of cornstalk lignin |
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| Institution: | 1. Department of Chemistry, University of Bergen, Allegaten 41, N-5007 Bergen, Norway;2. Department of Chemical and Environmental Engineering, School of Engineering, University of the Basque Country (EHU/UPV), C/Alameda Urquijo s/n, 48013 Bilbao, Spain;3. Department of Food Technology, Faculty of Agronomy, University of Kragujevac, Cara Dušana 34, 32000 Čačak, Serbia;1. Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany;2. Sustainable Catalytic Materials Group, Division Hydrogen Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg, Germany;1. Shijiazhuang Chemical Fiber Technology Innovation Center, Shijiazhuang University, Shijiazhuang 050035, China;2. North China Pharmaceutical Co., Ltd., Shijiazhuang 052165, China;1. Department of Mechanical Engineering, KAIST (Korea Advanced Institute of Science and Technology), Republic of Korea;2. Passenger Car Diesel Engine Performance Test Team, Hyundai Motor Company, Republic of Korea |
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| Abstract: | Cornstalk lignin was hydrothermally depolymerized at mild conditions in ethanol–water for producing value-added phenolics. The effects of residence time (from 30 min to 180 min), reaction temperature (from 498 K to 573 K) and concentration of ethanol (from 0% to 95% vol.) on yields of liquid products and phenolic compounds were studied in detail. The optimal conditions of 523 K, 90 min and 65% vol. ethanol–water resulted in the highest yield of liquid products (∼70 wt.%). The liquid products were analyzed by gas chromatography–mass spectrometry (GC–MS) to confirm the presence of primarily heterocycle (2,3-dihydrobenzofuran) and phenolics (such as ethylphenol, guaiacol, ethylguaiacol and syringol). Reaction conditions had significant effects on yield and composition of liquid products. |
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