Structural evolution of chars from biomass components pyrolysis in a xenon lamp radiation reactor

doi:10.1016/j.cjche.2016.08.002

›› 2017, Vol. 25 ›› Issue (2): 232-237.DOI: 10.1016/j.cjche.2016.08.002

• Energy, Resources and Environmental Technology • 上一篇下一篇

Structural evolution of chars from biomass components pyrolysis in a xenon lamp radiation reactor

Haizhou Lin, Shurong Wang, Li Zhang, Bin Ru, Jinsong Zhou, Zhongyang Luo

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

收稿日期:2016-07-15 修回日期:2016-08-04 出版日期:2017-02-28 发布日期:2017-03-14
通讯作者: Shurong Wang
基金资助:
Supported by the National Natural Science Foundation of China (51276166), the National Basic Research Program of China (2013CB228101) and the National Science and Technology Supporting Plan Through Contract (2015BAD15B06).

Structural evolution of chars from biomass components pyrolysis in a xenon lamp radiation reactor

Haizhou Lin, Shurong Wang, Li Zhang, Bin Ru, Jinsong Zhou, Zhongyang Luo

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Received:2016-07-15 Revised:2016-08-04 Online:2017-02-28 Published:2017-03-14
Supported by:
Supported by the National Natural Science Foundation of China (51276166), the National Basic Research Program of China (2013CB228101) and the National Science and Technology Supporting Plan Through Contract (2015BAD15B06).

摘要/Abstract

摘要： The structural evolution of the chars frompyrolysis of biomass components (cellulose, hemicellulose and lignin) in a xenon lamp radiation reactor was investigated. The elemental composition analysis showed that the C content increased at the expense of H and O contents during the chars formation. The values of Δ_H/C/Δ_O/C for the formation of cellulose and hemicellulose chars were close to 2, indicating that dehydrationwas the dominant reaction. Meanwhile, the value was more than 3 for lignin char formation, suggesting that the occurrence of demethoxylation was prevalent. FTIR and XRD analyses further disclosed that the cellulose pyrolysis needed to break down the stable crystal structure prior to the severe depolymerization. As for hemicellulose and lignin pyrolysis, the weak branches and linkages decomposed firstly, followed by the major decomposition. After the devolatilization at the main pyrolysis stage, the three components encountered a slow carbonization process to form condensed aromatic chars. The SEM results showed that the three components underwent different devolatilization behaviors, which induced various surface morphologies of the chars.

关键词: Biomass components, Pyrolysis, Char, Structural characterization

Abstract: The structural evolution of the chars frompyrolysis of biomass components (cellulose, hemicellulose and lignin) in a xenon lamp radiation reactor was investigated. The elemental composition analysis showed that the C content increased at the expense of H and O contents during the chars formation. The values of Δ_H/C/Δ_O/C for the formation of cellulose and hemicellulose chars were close to 2, indicating that dehydrationwas the dominant reaction. Meanwhile, the value was more than 3 for lignin char formation, suggesting that the occurrence of demethoxylation was prevalent. FTIR and XRD analyses further disclosed that the cellulose pyrolysis needed to break down the stable crystal structure prior to the severe depolymerization. As for hemicellulose and lignin pyrolysis, the weak branches and linkages decomposed firstly, followed by the major decomposition. After the devolatilization at the main pyrolysis stage, the three components encountered a slow carbonization process to form condensed aromatic chars. The SEM results showed that the three components underwent different devolatilization behaviors, which induced various surface morphologies of the chars.

Key words: Biomass components, Pyrolysis, Char, Structural characterization

Haizhou Lin, Shurong Wang, Li Zhang, Bin Ru, Jinsong Zhou, Zhongyang Luo. Structural evolution of chars from biomass components pyrolysis in a xenon lamp radiation reactor[J]. , 2017, 25(2): 232-237.

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Structural evolution of chars from biomass components pyrolysis in a xenon lamp radiation reactor

Structural evolution of chars from biomass components pyrolysis in a xenon lamp radiation reactor

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