Pyrolysis Mechanism Study of Lignin Model Compounds by Synchrotron Vacuum Ultraviolet Photoionization Mass Spectrometry

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	Pyrolysis Mechanism Study of Lignin Model Compounds by Synchrotron Vacuum Ultraviolet Photoionization Mass Spectrometry
	He, Tao 1; Zhang, Yimeng 1,2; Zhu, Yanan 3; Wen, Wu 3; Pan, Yang 3; Wu, Jingli 1,2; Wu, Jinhu 1
刊名	ENERGY & FUELS
	2016-03-01
卷号	30 期号:3 页码:2204-2208
英文摘要	To investigate the lignin pyrolysis mechanism, two a alpha-O-4 and one completely substituted beta-O-4 lignin dimeric model compounds were studied using in situ synchrotron vacuum ultraviolet photoionization time-of-flight mass spectrometry (SVUV PIMS) at 350-500 degrees C. The collision-reduced vacuum condition, in situ characteristic, and "soft" ionization technique of this reactor system allowed for the direct detection of thermolysis radicals and high-boiling-point compounds. For the alpha-O-4 compound 4-(benzyloxy)phenol (BOP) pyrolysis, benzyl radical, p-semiquinone radical, toluene, and bibenzyl were confirmed, supplying firm evidence for the free radical dominant mechanism. Experiments of the p-methoxy substituent on the hydroxyl position of BOP show that the p-methoxy substituent can lower the C-aromatic -C alpha and ether C-aromatic bond dissociation energies. For beta-O-4 compound guaiacylglycerol-beta-guaiacyl ether (GGGE), it is inferred that the C-O homolysis mechanism was minor and the concerted reaction dominated in the experimental temperature range. Also, parallel experiments were conducted to find the temperature effect on the product distribution; it reveals that a high temperature leads to the further decomposition of the primary products and an increase of the aldehyde and ketone components.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Energy & Fuels ; Engineering, Chemical
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	BOND-DISSOCIATION ENTHALPIES ; DENSITY-FUNCTIONAL THEORY ; CHAIN HYDROXYL-GROUPS ; GAS-PHASE ; THERMAL-DEGRADATION ; DIMER ; ETHER ; TEMPERATURE ; LINKAGES ; RADICALS
收录类别	SCI
语种	英语
WOS记录号	WOS:000372562800075
公开日期	2016-05-17
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/8067]
专题	青岛生物能源与过程研究所_热化学转化事业部
作者单位	1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China
推荐引用方式 GB/T 7714	He, Tao,Zhang, Yimeng,Zhu, Yanan,et al. Pyrolysis Mechanism Study of Lignin Model Compounds by Synchrotron Vacuum Ultraviolet Photoionization Mass Spectrometry[J]. ENERGY & FUELS,2016,30(3):2204-2208.
APA	He, Tao.,Zhang, Yimeng.,Zhu, Yanan.,Wen, Wu.,Pan, Yang.,...&Wu, Jinhu.(2016).Pyrolysis Mechanism Study of Lignin Model Compounds by Synchrotron Vacuum Ultraviolet Photoionization Mass Spectrometry.ENERGY & FUELS,30(3),2204-2208.
MLA	He, Tao,et al."Pyrolysis Mechanism Study of Lignin Model Compounds by Synchrotron Vacuum Ultraviolet Photoionization Mass Spectrometry".ENERGY & FUELS 30.3(2016):2204-2208.