Investigation into the correlation between the chemical structure of lignin and its temperature-dependent pyrolytic product evolution
文献类型：期刊论文
| 作者 | Wang, Chenyang3,4,5,6; Xia, Shengpeng3,4,5,6; Cui, Chaoxian3,4,5,6; Kang, Shunshun3,4,5,6; Zheng, Anqing4,5,6 ; Yu, Zhaosheng1,2,5,6; Zhao, Zengli4,5,6
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| 刊名 | FUEL
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| 出版日期 | 2022-12-01 |
| 卷号 | 329页码:9 |
| 关键词 | Lignin Chemical structures Pyrolytic products Mechanism Phenolic compounds |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2022.125215 |
| 通讯作者 | Zheng, Anqing(zhengaq@ms.giec.ac.cn) ; Yu, Zhaosheng(zsyu@scut.edu.cn) |
| 英文摘要 | The complex and diverse chemical structures of lignins pose huge challenges in understanding their pyrolysis behavior and mechanism. Herein, five representative lignins, including three organosolv lignins (corncob lignin, pine lignin, eucalyptus lignin), alkali lignin, and dealkalized lignin, were used as feedstocks in this study. Comparison of their pyrolysis behaviors, product evolutions, and mechanisms at different temperatures was investigated by using thermogravimetric analyzer coupled with mass spectrometer (TG-MS) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The chemical structure of lignin before and after pyrolysis at different temperatures was characterized by Fourier transform infrared spectrometry (FTIR). The results show that alkali lignin and dealkalized lignins provide relatively lower maximum weight loss rates and relatively higher amounts of char, CH4, H2O, CO, and CO2 due to the presence of alkali and alkaline earth metals. The distributions of phenolic compounds from lignin pyrolysis are related to the chemical structure of lignin, especially its S/G ratio. Moreover, the pyrolysis temperature also exerts significant effects on the distribution of phenolic compounds. Pyrolysis of corncob lignin at 300 degrees C achieves the effective breakage of ester linkage between p-Coumarates/ferulates and phenylpmpane moieties of S units to form 4-vinylphenol and 2-methoxy-4-vinylphenol. The optimal temperature for the breakage of interunit linkages of S and/or G units in lignin is 500 degrees C. The syringol-type compounds can be converted into guaiacol-type compounds via demethoxylation reactions at 500 degrees C. The syringol-type and guaiacol-type compounds can be further converted into phenol-type compounds and aromatics by demethoxylation and dehydroxylation reactions at 900 degrees C. These findings can guide the development of novel pyrolysis processes of lignin for the selective production of specific phenolic compounds. |
| WOS关键词 | THERMAL-DEGRADATION ; TGA-FTIR ; MECHANISM ; KINETICS ; MERCURY ; BIOMASS ; DIMER |
| 资助项目 | National Key R &D Program of China[2017YFE0124200] ; National Natural Science Foundation of China[51876205] ; National Natural Science Foundation of China[51876208] ; National Natural Science Foundation of China[51776209] ; Youth Innovation Promotion Association, CAS[2019341] ; Pearl River S &T Nova Program of Guangzhou[201806010061] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000860755700002 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Key R &D Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Pearl River S &T Nova Program of Guangzhou |
| 源URL | [http://ir.giec.ac.cn/handle/344007/37562]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Zheng, Anqing; Yu, Zhaosheng |
| 作者单位 | 1.Guangdong Prov Key Lab Efficient & Clean Energy Ut, Guangzhou 510640, Peoples R China 2.South China Univ Technol, Sch Elect Power, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 5.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Chenyang,Xia, Shengpeng,Cui, Chaoxian,et al. Investigation into the correlation between the chemical structure of lignin and its temperature-dependent pyrolytic product evolution[J]. FUEL,2022,329:9. |
| APA | Wang, Chenyang.,Xia, Shengpeng.,Cui, Chaoxian.,Kang, Shunshun.,Zheng, Anqing.,...&Zhao, Zengli.(2022).Investigation into the correlation between the chemical structure of lignin and its temperature-dependent pyrolytic product evolution.FUEL,329,9. |
| MLA | Wang, Chenyang,et al."Investigation into the correlation between the chemical structure of lignin and its temperature-dependent pyrolytic product evolution".FUEL 329(2022):9. |
入库方式： OAI收割
来源：广州能源研究所
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