Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method
Two hardwood species, namely red oak and yellow-poplar, were separated into their bark, sapwood and heartwood components. The samples were tested for calorific value, specific gravity, proximate analysis, mineral composition, chemical composition, ultimate analysis, and thermo-chemical decomposition...
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MDPI AG
2013-01-01
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| Series: | Agriculture |
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| Online Access: | http://www.mdpi.com/2077-0472/3/1/12 |
| _version_ | 1829493181151969280 |
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| author | John Zondlo Wenjia Jin Kaushlendra Singh |
| author_facet | John Zondlo Wenjia Jin Kaushlendra Singh |
| author_sort | John Zondlo |
| collection | DOAJ |
| description | Two hardwood species, namely red oak and yellow-poplar, were separated into their bark, sapwood and heartwood components. The samples were tested for calorific value, specific gravity, proximate analysis, mineral composition, chemical composition, ultimate analysis, and thermo-chemical decomposition behavior. In addition, the thermo-chemical decomposition behaviors of cellulose, xylan, and lignin polymers were also tested. Thermo-chemical decomposition behavior was assessed using a thermo-gravimetric (TGA) system by heating the sample from 50 °C to 700 °C at the heating rates of 10, 30 and 50 °C/min under nitrogen. The activation energy was calculated for various fractional conversion values using the isoconversion method. The results showed that char yields of lignin, cellulose and xylan were 41.43%, 4.45% and 1.89%, respectively, at the end of pyrolysis. Furthermore, cellulose, xylan and lignin decomposed dramatically in the temperature range of 320 °C to 360 °C, 150 °C to 230 °C and 100 °C to 410 °C, respectively, with decomposition peaks occurring at 340 °C, 200 °C and 340 °C, respectively. In addition, the maximum activation energy for cellulose was 381 kJ/mol at 360 °C and for xylan it was 348 kJ/mol at 210 °C. |
| first_indexed | 2024-12-16T06:29:48Z |
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| id | doaj.art-86e1b95dce9547b3a9c4bd5b76a3724e |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-12-16T06:29:48Z |
| publishDate | 2013-01-01 |
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| series | Agriculture |
| spelling | doaj.art-86e1b95dce9547b3a9c4bd5b76a3724e2022-12-21T22:40:55ZengMDPI AGAgriculture2077-04722013-01-0131123210.3390/agriculture3010012Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion MethodJohn ZondloWenjia JinKaushlendra SinghTwo hardwood species, namely red oak and yellow-poplar, were separated into their bark, sapwood and heartwood components. The samples were tested for calorific value, specific gravity, proximate analysis, mineral composition, chemical composition, ultimate analysis, and thermo-chemical decomposition behavior. In addition, the thermo-chemical decomposition behaviors of cellulose, xylan, and lignin polymers were also tested. Thermo-chemical decomposition behavior was assessed using a thermo-gravimetric (TGA) system by heating the sample from 50 °C to 700 °C at the heating rates of 10, 30 and 50 °C/min under nitrogen. The activation energy was calculated for various fractional conversion values using the isoconversion method. The results showed that char yields of lignin, cellulose and xylan were 41.43%, 4.45% and 1.89%, respectively, at the end of pyrolysis. Furthermore, cellulose, xylan and lignin decomposed dramatically in the temperature range of 320 °C to 360 °C, 150 °C to 230 °C and 100 °C to 410 °C, respectively, with decomposition peaks occurring at 340 °C, 200 °C and 340 °C, respectively. In addition, the maximum activation energy for cellulose was 381 kJ/mol at 360 °C and for xylan it was 348 kJ/mol at 210 °C.http://www.mdpi.com/2077-0472/3/1/12bioenergytorrefactionhardwood componentsactivation energy&#160 |
| spellingShingle | John Zondlo Wenjia Jin Kaushlendra Singh Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method Agriculture bioenergy torrefaction hardwood components activation energy&#160 |
| title | Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method |
| title_full | Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method |
| title_fullStr | Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method |
| title_full_unstemmed | Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method |
| title_short | Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method |
| title_sort | pyrolysis kinetics of physical components of wood and wood polymers using isoconversion method |
| topic | bioenergy torrefaction hardwood components activation energy&#160 |
| url | http://www.mdpi.com/2077-0472/3/1/12 |
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