Estimation of energy properties of torrefied Japanese cedar with colorimetric values
Noticing the color variation of torrefied woody biomass with pyrolysis process, a non-invasive method to estimate energy properties such as elemental contents, higher heating value and energy yield is investigated. When the torrefied biofuel is produced and utilized, the quality control concerning e...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2016-12-01
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| Series: | Mechanical Engineering Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/mej/4/1/4_16-00320/_pdf/-char/en |
| _version_ | 1818694736329834496 |
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| author | Toru SAWAI Ichiro KATAYAMA Tamio IDA Hiroki IMAMURA Takeshi KAJIMOTO |
| author_facet | Toru SAWAI Ichiro KATAYAMA Tamio IDA Hiroki IMAMURA Takeshi KAJIMOTO |
| author_sort | Toru SAWAI |
| collection | DOAJ |
| description | Noticing the color variation of torrefied woody biomass with pyrolysis process, a non-invasive method to estimate energy properties such as elemental contents, higher heating value and energy yield is investigated. When the torrefied biofuel is produced and utilized, the quality control concerning energy properties is indispensable. The energy properties of torrefied woody biomass are correlated with its mass yield, and the relationship between mass yields and colorimetric values defined by CIELAB is experimentally examined. The results obtained for torrefied Japanese cedar are as follows. (1) The energy properties of torrefied Japanese cedar are expressed by simple relations of mass yield. The optimum torrefaction condition to produce torrefied biofuel can be evaluated by the mass yield. (2) To estimate the mass yield of torrefied Japanese cedar, the experimental correlations with colorimetric values are proposed. In the case of the sap-wood and heart-wood samples for brightness, L* above 45, the mass yield is correlated with L*, and in the case of the sap-wood, heart-wood and bark samples for L* below 45, the mass yield is correlated with color coordinate, a*. From the comparison between predicted mass yields and experimental data, it is found that the proposed experimental correlations can estimate the mass yield within an accuracy of ±10%. Therefore, the energy properties of torrefied Japanese cedar is easy to be checked by using the present non-invasive estimation method with colorimetric values. |
| first_indexed | 2024-12-17T13:34:19Z |
| format | Article |
| id | doaj.art-f404be530c1b464ba50ab53e669badbc |
| institution | Directory Open Access Journal |
| issn | 2187-9745 |
| language | English |
| last_indexed | 2024-12-17T13:34:19Z |
| publishDate | 2016-12-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj.art-f404be530c1b464ba50ab53e669badbc2022-12-21T21:46:28ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452016-12-014116-0032016-0032010.1299/mej.16-00320mejEstimation of energy properties of torrefied Japanese cedar with colorimetric valuesToru SAWAI0Ichiro KATAYAMA1Tamio IDA2Hiroki IMAMURA3Takeshi KAJIMOTO4Department of Mechanical Engineering, Kindai UniversityDepartment of Biomechanical and Human Factors Engineering, Kindai UniversityResearch Institute of Biocoke, Kindai UniversityGraduate School of Biology-Oriented Science and Technology, Kindai UniversityIndustrial Technology Center of Wakayama PrefectureNoticing the color variation of torrefied woody biomass with pyrolysis process, a non-invasive method to estimate energy properties such as elemental contents, higher heating value and energy yield is investigated. When the torrefied biofuel is produced and utilized, the quality control concerning energy properties is indispensable. The energy properties of torrefied woody biomass are correlated with its mass yield, and the relationship between mass yields and colorimetric values defined by CIELAB is experimentally examined. The results obtained for torrefied Japanese cedar are as follows. (1) The energy properties of torrefied Japanese cedar are expressed by simple relations of mass yield. The optimum torrefaction condition to produce torrefied biofuel can be evaluated by the mass yield. (2) To estimate the mass yield of torrefied Japanese cedar, the experimental correlations with colorimetric values are proposed. In the case of the sap-wood and heart-wood samples for brightness, L* above 45, the mass yield is correlated with L*, and in the case of the sap-wood, heart-wood and bark samples for L* below 45, the mass yield is correlated with color coordinate, a*. From the comparison between predicted mass yields and experimental data, it is found that the proposed experimental correlations can estimate the mass yield within an accuracy of ±10%. Therefore, the energy properties of torrefied Japanese cedar is easy to be checked by using the present non-invasive estimation method with colorimetric values.https://www.jstage.jst.go.jp/article/mej/4/1/4_16-00320/_pdf/-char/enwoody biomasstorrefactionsolid biofuelhigher heating valueenergy yieldcolorimetric values |
| spellingShingle | Toru SAWAI Ichiro KATAYAMA Tamio IDA Hiroki IMAMURA Takeshi KAJIMOTO Estimation of energy properties of torrefied Japanese cedar with colorimetric values Mechanical Engineering Journal woody biomass torrefaction solid biofuel higher heating value energy yield colorimetric values |
| title | Estimation of energy properties of torrefied Japanese cedar with colorimetric values |
| title_full | Estimation of energy properties of torrefied Japanese cedar with colorimetric values |
| title_fullStr | Estimation of energy properties of torrefied Japanese cedar with colorimetric values |
| title_full_unstemmed | Estimation of energy properties of torrefied Japanese cedar with colorimetric values |
| title_short | Estimation of energy properties of torrefied Japanese cedar with colorimetric values |
| title_sort | estimation of energy properties of torrefied japanese cedar with colorimetric values |
| topic | woody biomass torrefaction solid biofuel higher heating value energy yield colorimetric values |
| url | https://www.jstage.jst.go.jp/article/mej/4/1/4_16-00320/_pdf/-char/en |
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