Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid Obtained
Pyrolysis of biomass converts all components into liquid, gaseous, and solid products without the need for component separation. However, the composition of liquid products from lignocellulosic biomass is usually complex and difficult to upgrade. Slow pyrolysis of de-oiled rapeseed cake, an agricult...
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MDPI AG
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| Online Access: | https://www.mdpi.com/1996-1073/17/3/612 |
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| author | Yue Wang Yuanjiang Zhao Changwei Hu |
| author_facet | Yue Wang Yuanjiang Zhao Changwei Hu |
| author_sort | Yue Wang |
| collection | DOAJ |
| description | Pyrolysis of biomass converts all components into liquid, gaseous, and solid products without the need for component separation. However, the composition of liquid products from lignocellulosic biomass is usually complex and difficult to upgrade. Slow pyrolysis of de-oiled rapeseed cake, an agricultural waste from the rapeseed pressing process, was carried out for liquid and solid fuel production. The maximum yield of bio-oil obtained was 51.6 wt.% under the optimized conditions. The HHV of the bio-oil, containing mainly acids, hydrocarbons, esters, and alcohols, was 32.82 MJ·kg<sup>−1</sup>, similar to that of bio-diesel, to be promising in downstream upgrading because the fuel properties such as higher caloric value, limited moisture content, as well as neutral pH value, were close to commercial bio-diesel. The gaseous fraction mainly consisted of CO, C<sub>1</sub>, C<sub>2</sub> hydrocarbons, H<sub>2</sub>, and CO<sub>2</sub>, and the corresponding LHV reached 7.63 MJ·Nm<sup>−3</sup>. The yield of bio-chars declined from 41.8 wt.% at 400 °C to 28.8 wt.% at 800 °C, whereas the corresponding HHV varied from 29.03 MJ·kg<sup>−1</sup> to 30.14 MJ·kg<sup>−1</sup>, comparative to coal, indicating a promising candidate for solid fuels or functional carbon. The liquid product shows promise as feedstock for producing high-quality fuel. |
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| format | Article |
| id | doaj.art-a978166237434050a495c82e38424892 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-08T03:57:55Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-a978166237434050a495c82e384248922024-02-09T15:11:17ZengMDPI AGEnergies1996-10732024-01-0117361210.3390/en17030612Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid ObtainedYue Wang0Yuanjiang Zhao1Changwei Hu2Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Wangjiang Road 29, Chengdu 610064, ChinaKey Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaKey Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Wangjiang Road 29, Chengdu 610064, ChinaPyrolysis of biomass converts all components into liquid, gaseous, and solid products without the need for component separation. However, the composition of liquid products from lignocellulosic biomass is usually complex and difficult to upgrade. Slow pyrolysis of de-oiled rapeseed cake, an agricultural waste from the rapeseed pressing process, was carried out for liquid and solid fuel production. The maximum yield of bio-oil obtained was 51.6 wt.% under the optimized conditions. The HHV of the bio-oil, containing mainly acids, hydrocarbons, esters, and alcohols, was 32.82 MJ·kg<sup>−1</sup>, similar to that of bio-diesel, to be promising in downstream upgrading because the fuel properties such as higher caloric value, limited moisture content, as well as neutral pH value, were close to commercial bio-diesel. The gaseous fraction mainly consisted of CO, C<sub>1</sub>, C<sub>2</sub> hydrocarbons, H<sub>2</sub>, and CO<sub>2</sub>, and the corresponding LHV reached 7.63 MJ·Nm<sup>−3</sup>. The yield of bio-chars declined from 41.8 wt.% at 400 °C to 28.8 wt.% at 800 °C, whereas the corresponding HHV varied from 29.03 MJ·kg<sup>−1</sup> to 30.14 MJ·kg<sup>−1</sup>, comparative to coal, indicating a promising candidate for solid fuels or functional carbon. The liquid product shows promise as feedstock for producing high-quality fuel.https://www.mdpi.com/1996-1073/17/3/612de-oiled rapeseed cakebio-oilpyrolysis parameters |
| spellingShingle | Yue Wang Yuanjiang Zhao Changwei Hu Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid Obtained Energies de-oiled rapeseed cake bio-oil pyrolysis parameters |
| title | Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid Obtained |
| title_full | Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid Obtained |
| title_fullStr | Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid Obtained |
| title_full_unstemmed | Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid Obtained |
| title_short | Slow Pyrolysis of De-Oiled Rapeseed Cake: Influence of Pyrolysis Parameters on the Yield and Characteristics of the Liquid Obtained |
| title_sort | slow pyrolysis of de oiled rapeseed cake influence of pyrolysis parameters on the yield and characteristics of the liquid obtained |
| topic | de-oiled rapeseed cake bio-oil pyrolysis parameters |
| url | https://www.mdpi.com/1996-1073/17/3/612 |
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