A new method for evaluating the sewage sludge pyrolysis kinetics |
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| Authors: | Aimin Ji Shuting Zhang Xuebin Lu Yong Liu |
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| Institution: | 1. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. Department of Environmental Engineering, Bolu Abant Izzet Baysal University, Bolu 14052, Turkey;3. Department of Environmental Engineering, Ardahan University, Ardahan 75002, Turkey;4. Department of Chemical Engineering, Bolu Abant Izzet Baysal University, Bolu 14052, Turkey;1. Thermal Engineering Group, Faculty of Engineering Technology, University of Twente, 7500AE Enschede, The Netherlands;2. School of Chemical & Materials Engineering, National University of Sciences & Technology, H-12 Islamabad, Pakistan;3. Departments of Chemical and Materials Engineering, King Abdulaziz University, Rabigh, Saudi Arabia;4. Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia;5. Department of Engineering and Chemical Sciences, Karlstad University, Sweden;6. Department of Chemical Engineering, KFUPM, Dhahran, Saudi Arabia;7. Chemical Engineering Department, NED University of Engineering and Technology, 75270 Karachi, Pakistan;1. Departamento de Engenharia Química, Universidade Federal do Rio Grande do Norte (UFRN), Brazil;2. Departamento de Engenharia Ambiental, Instituto Federal do Tocantins (IFTO), Brazil;1. School of Environmental Science & Technology, Dalian University of Technology, Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, Dalian 116024, China;2. Institute of Process Engineering, Chinese Academy of Sciences, State Key Laboratory of Multiphase Complex Systems, Beijing 100190, China |
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| Abstract: | A new method to simplify calculation the kinetics model is applied to sewage sludge pyrolysis based on the assumption that volatile run out as soon as it formed and during temperature arising process in this study. Difference method widely used to solve math problems is conducted to calculate kinetics parameters. Pyrolysis experiments are carried out at heating rates of 10, 15, 20, and 50 °C/min. All the TG curves are divided into three parts which are beginning decomposition temperature range, main decomposition temperature range, and final decomposition temperature range. The second one is employed to determine the parameters for more than 70% of the total mass loss occurs in this range. According to the developed method, the react order, reaction energy and pre-exponential factor are obtained, which are in the range of 3.9–4.1, 82.3–109.2 kJ/mol and 7.7 × 106–2.8 × 109/min, respectively, which are in the range of that reported previously. As a comparison experimental data with calculated data, the well fitting results indicate that this method is appropriate for simulating sludge pyrolysis kinetics. |
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