An investigation on the aqueous-phase hydrodeoxygenation of various methoxy-substituted lignin monomers on Pd/C and HZSM-5 catalysts

doi:10.1039/c6ra22492j

QIBEBT-IR > 多相催化转化研究组

	An investigation on the aqueous-phase hydrodeoxygenation of various methoxy-substituted lignin monomers on Pd/C and HZSM-5 catalysts
	Zhang, Cong1 ; Qi, Jingbo 1; Xing, Jing1,2 ; Tang, Si-Fu1 ; Song, Liang1 ; Sun, Yuanyuan1 ; Zhang, Chuanhui1 ; Xin, Hongchuan 1; Li, Xuebing1
	2016
发表期刊	RSC ADVANCES
卷号	6 期号:106 页码:104398-104406
摘要	Aqueous phase catalytic upgrading of lignin monomers to hydrocarbons via hydrodeoxygenation (HDO) has been explored using a combination of Pd/C and HZSM-5 catalysts under 2 MPa of H-2 (ambient temperature). Model monomers with varying numbers of methoxy groups, including phenol, anisole, guaiacol and 2,6-dimethoxy-phenol, were chosen as lignin model compounds. Mechanistic studies revealed cascade and parallel reaction pathways via hydrogenation and dehydration (hydrolysis) processes, which were catalyzed by Pd/C and HZSM-5, respectively. Hydrogenation was preferred at lower temperature, whereas higher temperature was favorable for the removal of oxygen-containing functional groups. The effect of methoxy groups on the HDO of these monomers was also investigated systematically. Basically, the conversion of multi-substituted monomers was tougher than that of monosubstituted ones, due to steric constraint and the inhibition of the electron-donating hydroxyl group. The selectivities to cyclohexane from phenol and anisole were improved significantly by increasing the temperature to 413 K. However, cyclohexanone was preferably produced over cyclohexane when using model compounds with multi-substituents (guaiacol and 2,6-dimethoxy-phenol), even at temperatures above 513 K. Comparative experiments were also conducted on the HDO of 1,2-cyclohexanediol with or without the presence of phenol, which clearly suggested that the further HDO of guaiacol and 2,6-dimethoxy-phenol was inhibited, probably due to the strong interactions between cyclohexanediol molecules and Bronsted acid sites.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1039/c6ra22492j
关键词[WOS]	BIOMASS PYROLYSIS OIL ; MODEL-COMPOUND ; BIO-OIL ; REACTION PATHWAYS ; GUAIACOL ; PHENOLS ; NICKEL ; FUELS ; CONVERSION ; CHEMICALS
收录类别	SCI
语种	英语
WOS研究方向	Chemistry
项目资助者	National Natural Science Foundation of China(21276263 ; "100 Talents" program of the Chinese Academy of Sciences(KJCX2-EW-H05) ; 21306214 ; 21171173)
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000388111900063
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/9099
专题	多相催化转化研究组
作者单位	1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China 2.Liaoning Shihua Univ, Sch Chem & Mat Sci, Fushun 113001, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Cong,Qi, Jingbo,Xing, Jing,et al. An investigation on the aqueous-phase hydrodeoxygenation of various methoxy-substituted lignin monomers on Pd/C and HZSM-5 catalysts[J]. RSC ADVANCES,2016,6(106):104398-104406.
APA	Zhang, Cong.,Qi, Jingbo.,Xing, Jing.,Tang, Si-Fu.,Song, Liang.,...&Li, Xuebing.(2016).An investigation on the aqueous-phase hydrodeoxygenation of various methoxy-substituted lignin monomers on Pd/C and HZSM-5 catalysts.RSC ADVANCES,6(106),104398-104406.
MLA	Zhang, Cong,et al."An investigation on the aqueous-phase hydrodeoxygenation of various methoxy-substituted lignin monomers on Pd/C and HZSM-5 catalysts".RSC ADVANCES 6.106(2016):104398-104406.