Tungsten Carbide: A Remarkably Efficient Catalyst for the Selective Cleavage of Lignin C-O Bonds

doi:10.1002/cssc.201600901

	Tungsten Carbide: A Remarkably Efficient Catalyst for the Selective Cleavage of Lignin C-O Bonds
	Zhang, Tao 1; Guo, Haiwei 1,2; Zhang, Bo 1; Li, Changzhi 1; Peng, Chang 1,2; Dai, Tao 1,2; Xie, Haibo 3; Wang, Aiqin 1
刊名	CHEMSUSCHEM
	2016-11-23
卷号	9 期号:22 页码:3220-3229
关键词	Aromatics Biomass Lignin Methanol Tungsten
ISSN号	1864-5631
DOI	10.1002/cssc.201600901
文献子类	Article
英文摘要	A remarkably effective method for the chemoselective cleavage of the C-O bonds of typical beta-O-4 model compounds and the deconstruction of lignin feedstock was developed by using tungsten carbide as the catalyst. High yields of C-O cleavage products (up to 96.8%) from model compounds and liquid oils (up to 70.7%) from lignin feedstock were obtained under low hydrogen pressure (0.69 MPa) in methanol. The conversion efficiency was determined to a large extent by solvent effects and was also affected by both the electronic and steric effects of the lignin model compounds. In situ W2C/activated carbon (AC)-catalyzed hydrogen transfer from methanol to the substrate was proposed to be responsible for the high performance in methanol solvent. The conversion of 2-(2-methoxyphenoxy)-1-phenylethanol showed that the catalyst could be reused five times without a significant loss in activity for C-chemoselective-O bond cleavage, whereas the selectivity to value-added styrene increased markedly owing to partial oxidation of the W2C phase according to X-ray diffraction, Raman spectroscopy, and transmission electron microscopy characterization. 2D-HSQCNMR spectroscopy analysis showed that W2C/AC exhibited high activity not only for beta-O-4 cleavage but also for the deconstruction of more resistant alpha-O-4 and beta-beta linkages, so that a high yield of liquid oil was obtained from lignin. Corn stalk lignin was more liable to be depolymerized than birch lignin owing to its loosened structure (scanning electron microscopy results), larger surface area (BET results), and lower molecular weight (gel-permeation chromatography results), whereas its liquid oil composition was more complicated than that of birch wood lignin in that the former lignin contained more p-hydroxyphenyl units and the former contained noncanonical units.
WOS关键词	METAL-CATALYSTS ; MOLYBDENUM CARBIDE ; ETHYLENE-GLYCOL ; PHENOLIC-COMPOUNDS ; ORGANOSOLV LIGNIN ; HYDROGEN-TRANSFER ; MODEL COMPOUNDS ; AQUEOUS-PHASE ; WOODY BIOMASS ; SOFT OXIDANT
WOS研究方向	Chemistry
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000394571300013
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169608]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Zhang, Tao; Li, Changzhi
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tao,Guo, Haiwei,Zhang, Bo,et al. Tungsten Carbide: A Remarkably Efficient Catalyst for the Selective Cleavage of Lignin C-O Bonds[J]. CHEMSUSCHEM,2016,9(22):3220-3229.
APA	Zhang, Tao.,Guo, Haiwei.,Zhang, Bo.,Li, Changzhi.,Peng, Chang.,...&Wang, Aiqin.(2016).Tungsten Carbide: A Remarkably Efficient Catalyst for the Selective Cleavage of Lignin C-O Bonds.CHEMSUSCHEM,9(22),3220-3229.
MLA	Zhang, Tao,et al."Tungsten Carbide: A Remarkably Efficient Catalyst for the Selective Cleavage of Lignin C-O Bonds".CHEMSUSCHEM 9.22(2016):3220-3229.