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Study of cellulose pyrolysis using an in situ visualization technique and thermogravimetric analyzer
Institution:1. Shanghai Institute of Technology, Shanghai 200235, PR China;2. Dept. of Chem. Eng., Shanghai University, Shanghai 200444, PR China;2. Department of Radiation Oncology, IU Health Methodist Hospital, Indianapolis, IN;1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China;2. Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China;3. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA;4. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China;1. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA;2. Biochemical Engineering College, Beijing Union University, No. 18, Fatouxili 3 Area, Chaoyang District, Beijing 100023, China;3. Ministry of Education Engineering Research Center for Biomass Conversion, Nanchang University, 235 Nanjing Road, Nanchang, Jiangxi 330047, China;1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China;2. Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China;3. Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA;4. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
Abstract:A technique has been developed to study cellulose pyrolysis by in situ visualization of cellulose transformation in a quartz capillary under a microscope using a CCD camera monitoring system and Raman spectroscopy. The processes and temperature of cellulose transformation during pyrolysis reaction can be observed directly. In situ visualization of reaction revealed that how oil is generated and expulsed concurrently from cellulose during pyrolysis. The in situ visualization result is the first direct evidence to show cellulose pyrolysis transformation. Pyrolysis characteristics were investigated under a highly purified N2 atmosphere using a thermogravimetric analyzer from room temperature to 500 °C at the heating rate of 5 °C/min. The results showed that three stages appeared in this thermal degradation process. Kinetic parameters in terms of apparent activation energy and pre-exponential factor were determined.
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