Characterization and comparative study of pyrolysis kinetics of the rice husk and the elephant grass
A comparative evaluation of different biomasses allows the choice that presents the best potential as fuel for energy production. The knowledge of the thermal and kinetics parameters of the biomass in the process of thermal conversion is fundamental as their chemical and physical characterization. V...
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| Veröffentlicht in: | Journal of thermal analysis and calorimetry 2014-02, Vol.115 (2), p.1915-1920 |
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| container_title | Journal of thermal analysis and calorimetry |
| container_volume | 115 |
| creator | Braga, Renata M. Melo, Dulce M. A. Aquino, Flavia M. Freitas, Julio C. O. Melo, Marcus A. F. Barros, Joana M. F. Fontes, Maria S. B. |
| description | A comparative evaluation of different biomasses allows the choice that presents the best potential as fuel for energy production. The knowledge of the thermal and kinetics parameters of the biomass in the process of thermal conversion is fundamental as their chemical and physical characterization. Various methodologies have been developed for the determination of kinetic parameters as apparent activation energy and reaction order from the thermogravimetric analysis. In this work, the apparent activation energy needed to break the bonds of hemicelluloses and cellulose of rice husk and elephant grass during the thermal conversion was evaluated according to the kinetics models of Flynn and Wall and Model Free Kinetics developed by Vyazovkin. The biomass elephant grass and rice husk were characterized for moisture, ash and volatile matter by ASTM E871, ASTM E1755, ASTM E872, respectively, and fixed carbon by difference. The percentage of carbon, hydrogen, nitrogen, and oxygen were determined by ultimate analysis. The elephant grass showed to be more suitable for production of bio-oil through pyrolysis due to the higher percentage of volatile, less ash content and less energy required to break the bonds of hemicellulose and cellulose than rice husk in the thermal conversion process. |
| doi_str_mv | 10.1007/s10973-013-3503-7 |
| format | Article |
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In this work, the apparent activation energy needed to break the bonds of hemicelluloses and cellulose of rice husk and elephant grass during the thermal conversion was evaluated according to the kinetics models of Flynn and Wall and Model Free Kinetics developed by Vyazovkin. The biomass elephant grass and rice husk were characterized for moisture, ash and volatile matter by ASTM E871, ASTM E1755, ASTM E872, respectively, and fixed carbon by difference. The percentage of carbon, hydrogen, nitrogen, and oxygen were determined by ultimate analysis. 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A.</creatorcontrib><creatorcontrib>Aquino, Flavia M.</creatorcontrib><creatorcontrib>Freitas, Julio C. O.</creatorcontrib><creatorcontrib>Melo, Marcus A. F.</creatorcontrib><creatorcontrib>Barros, Joana M. F.</creatorcontrib><creatorcontrib>Fontes, Maria S. B.</creatorcontrib><title>Characterization and comparative study of pyrolysis kinetics of the rice husk and the elephant grass</title><title>Journal of thermal analysis and calorimetry</title><addtitle>J Therm Anal Calorim</addtitle><description>A comparative evaluation of different biomasses allows the choice that presents the best potential as fuel for energy production. The knowledge of the thermal and kinetics parameters of the biomass in the process of thermal conversion is fundamental as their chemical and physical characterization. Various methodologies have been developed for the determination of kinetic parameters as apparent activation energy and reaction order from the thermogravimetric analysis. In this work, the apparent activation energy needed to break the bonds of hemicelluloses and cellulose of rice husk and elephant grass during the thermal conversion was evaluated according to the kinetics models of Flynn and Wall and Model Free Kinetics developed by Vyazovkin. The biomass elephant grass and rice husk were characterized for moisture, ash and volatile matter by ASTM E871, ASTM E1755, ASTM E872, respectively, and fixed carbon by difference. The percentage of carbon, hydrogen, nitrogen, and oxygen were determined by ultimate analysis. The elephant grass showed to be more suitable for production of bio-oil through pyrolysis due to the higher percentage of volatile, less ash content and less energy required to break the bonds of hemicellulose and cellulose than rice husk in the thermal conversion process.</description><subject>Activation energy</subject><subject>Analysis</subject><subject>Analytical Chemistry</subject><subject>Ashes</subject><subject>Biomass</subject><subject>Carbon</subject><subject>Cellulose</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Conversion</subject><subject>Elephant grass</subject><subject>Inorganic Chemistry</subject><subject>Measurement Science and Instrumentation</subject><subject>Physical Chemistry</subject><subject>Polymer Sciences</subject><subject>Pyrolysis</subject><subject>Reaction kinetics</subject><subject>Rice</subject><issn>1388-6150</issn><issn>1588-2926</issn><issn>1572-8943</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNp9kc1O3DAURqMKpPLTB-jOS7oI2LETx0s0Ki0SEhKwtxznZsaQsYOvU3V4-joNGzbIC18dnc-y7lcU3xm9ZJTKK2RUSV5SxkteU17KL8UJq9u2rFTVHOWZ57lhNf1anCI-U0qVouyk6Dc7E41NEN2bSS54YnxPbNhPGSf3BwimuT-QMJDpEMN4QIfkxXlIzuJC0w5IdBbIbsaX_-GFwAjTzvhEttEgnhfHgxkRvr3fZ8XTzc-nze_y7v7X7eb6rrSCs1QK21nWdiCUMKpig1RtrxjwhtJGKWElt1IJLjKsGlEr6DnjsutMRSujOn5WXKzPTjG8zoBJ7x1aGEfjIcyoWSOZEE3dyqxerurWjKCdH0LKW8inh72zwcPgMr_mklUtr-s6B358CGQnwd-0NTOivn18-Oiy1bUxIEYY9BTd3sSDZlQvbem1LZ3b0ktbevlQtWYwu34LUT-HOfq8rU9C_wB0CJbJ</recordid><startdate>20140201</startdate><enddate>20140201</enddate><creator>Braga, Renata M.</creator><creator>Melo, Dulce M. 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Various methodologies have been developed for the determination of kinetic parameters as apparent activation energy and reaction order from the thermogravimetric analysis. In this work, the apparent activation energy needed to break the bonds of hemicelluloses and cellulose of rice husk and elephant grass during the thermal conversion was evaluated according to the kinetics models of Flynn and Wall and Model Free Kinetics developed by Vyazovkin. The biomass elephant grass and rice husk were characterized for moisture, ash and volatile matter by ASTM E871, ASTM E1755, ASTM E872, respectively, and fixed carbon by difference. The percentage of carbon, hydrogen, nitrogen, and oxygen were determined by ultimate analysis. The elephant grass showed to be more suitable for production of bio-oil through pyrolysis due to the higher percentage of volatile, less ash content and less energy required to break the bonds of hemicellulose and cellulose than rice husk in the thermal conversion process.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10973-013-3503-7</doi><tpages>6</tpages></addata></record> |
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| source | SpringerNature Journals |
| subjects | Activation energy Analysis Analytical Chemistry Ashes Biomass Carbon Cellulose Chemistry Chemistry and Materials Science Conversion Elephant grass Inorganic Chemistry Measurement Science and Instrumentation Physical Chemistry Polymer Sciences Pyrolysis Reaction kinetics Rice |
| title | Characterization and comparative study of pyrolysis kinetics of the rice husk and the elephant grass |
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