Comparison of Kinetic Models for Carbon Dioxide and Steam Gasification of Rice Husk Char
| Autor: | David G. F. Adamon, Latif Adéniyi Fagbemi, E.A. Sanya, Ammar Bensakhria |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Arrhenius equation Environmental Engineering Waste management Renewable Energy Sustainability and the Environment Chemistry 020209 energy chemistry.chemical_element 02 engineering and technology Activation energy 01 natural sciences chemistry.chemical_compound symbols.namesake Volume (thermodynamics) Chemical engineering 010608 biotechnology Carbon dioxide 0202 electrical engineering electronic engineering information engineering symbols Char Muffle furnace Waste Management and Disposal Pyrolysis Carbon |
| Zdroj: | Waste and Biomass Valorization. 10:407-415 |
| ISSN: | 1877-265X 1877-2641 |
| DOI: | 10.1007/s12649-017-0054-3 |
| Popis: | This study reports carbon conversion rate calculated from the online gas analysis obtained from rice husks char gasification by using carbon dioxide and steam as reactive gases. Rice husks char is produced by the pyrolysis of rice husks in a muffle furnace at 450 °C during 45 min. The gasification tests are carried out at several temperatures 900, 950 and 1000 °C by using carbon dioxide and steam under isothermal conditions. The volume reaction model (VRM), shrinking core model (SCM) and random pore model (RPM) are studied to interpret obtained experimental data. Kinetic parameters such as activation energy (E) and pre-exponential factors (A) are determined from gas-analysis data by using Arrhenius equation. From results confrontation, between experimental data and obtained results from used models, it is found that RPM agrees better with experimental data than the other two models. We also obtained an activation energy of 165.8 kJ/mol and pre-exponential factor of 2595.4 s−1 for Ψ equal to 3.8 for carbon dioxide gasification and, respectively, 152.9 kJ/mol and 3473.4 s−1 from Ψ = 2.16 for steam gasification. |
| Databáze: | OpenAIRE |
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