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学科主题: 物理化学
题名: Lignin depolymerization (LDP) in alcohol over nickel-based catalysts via a fragmentation-hydrogenolysis process
作者: Song, Qi1, 2;  Wang, Feng1;  Cai, Jiaying1, 2;  Wang, Yehong1;  Zhang, Junjie1, 2;  Yu, Weiqiang1;  Xu, Jie1
通讯作者: 徐杰 ;  王峰
刊名: ENERGY & ENVIRONMENTAL SCIENCE
发表日期: 2013-03-01
DOI: 10.1039/c2ee23741e
卷: 6, 期:3, 页:994-1007
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: DNL06
项目归属: DNL0601
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Multidisciplinary ;  Energy & Fuels ;  Engineering, Chemical ;  Environmental Sciences
资助者: 1,1
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Engineering ;  Environmental Sciences & Ecology
英文摘要: Valorization of native birch wood lignin into monomeric phenols over nickel-based catalysts has been studied. High chemoselectivity to aromatic products was achieved by using Ni-based catalysts and common alcohols as solvents. The results show that lignin can be selectively cleaved into propylguaiacol and propylsyringol with total selectivity >90% at a lignin conversion of about 50%. Alcohols, such as methanol, ethanol and ethylene glycol, are suitable solvents for lignin conversion. Analyses with MALDI-TOF and NMR show that birch lignin is first fragmented into smaller lignin species consisting of several benzene rings with a molecular weight of m/z ca. 1100 to ca. 1600 via alcoholysis reaction. The second step involves the hydrogenolysis of the fragments into phenols. The presence of gaseous H-2 has no effect on lignin conversion, indicating that alcohols provide active hydrogen species, which is further confirmed by isotopic tracing experiments. Catalysts are recycled by magnetic separation and can be reused four times without losing activity. The mechanistic insights from this work could be helpful in understanding native lignin conversion and the formation of monomeric phenolics via reductive depolymerization.
关键词[WOS]: O BOND-CLEAVAGE ;  DEUTERIUM-EXCHANGE-REACTIONS ;  OXYGEN-MEDIATED DEGRADATION ;  STEAM-EXPLODED LIGNIN ;  MODEL COMPOUNDS ;  PALLADIUM CATALYSTS ;  OXIDATION-PRODUCTS ;  ISOTOPE-EXCHANGE ;  HARDWOOD LIGNIN ;  H/D EXCHANGE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000315165700036
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119313
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Song, Qi,Wang, Feng,Cai, Jiaying,et al. Lignin depolymerization (LDP) in alcohol over nickel-based catalysts via a fragmentation-hydrogenolysis process[J]. ENERGY & ENVIRONMENTAL SCIENCE,2013,6(3):994-1007.
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