DICP OpenIR
Anatase TiO2 Activated by Gold Nanoparticles for Selective Hydrodeoxygenation of Guaiacol to Phenolics
Mao, Jingbo1,2,3; Zhou, Jinxia3; Xia, Zhi1; Wang, Zhiguang1; Xu, Zhanwei1; Xu, Wenjuan1; Yan, Peifang1; Liu, Kairui1; Guo, Xinwen2; Zhang, Z. Conrad1
关键词Guaiacol Hydrogenation Phenol Gold Catalyst Anatase Lignin
刊名ACS CATALYSIS
2017
DOI10.1021/acscatal.6b02368
7期:1页:695-705
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]VAPOR-PHASE HYDRODEOXYGENATION ; AU NANOPARTICLES ; LOW-TEMPERATURE ; HYDROGENATION CATALYSIS ; TRANSPORTATION FUELS ; CO-OXIDATION ; SUPPORTED NI ; CONVERSION ; PLATINUM ; KINETICS
英文摘要Gold nanoparticles on a number of supporting materials, including anatase TiO2 (TiO2-A, in 40 nm and 45 pm), rutile TiO2 (TiO2-R), ZrO2, Al2O3, SiO2, and activated carbon, were evaluated for hydrodeoxygenation of guaiacol in 6.5 MPa initial H-2 pressure at 300 degrees C. The presence of gold nanoparticles on the supports did not show distinguishable performance compared to that of the supports alone in the conversion level and in the product distribution, except for that on a TiO2-A-40 nm. The lack of marked catalytic activity on supports other than TiO2-A-40 nm suggests that Au nanoparticles are not catalytically active on these supports. Most strikingly, the gold nanoparticles on the least-active TiO2-A-40 nm support stood out as the best catalyst exhibiting high activity with excellent stability and remarkable selectivity to phenolics from guaiacol hydrodeoxygenation. The conversion of guaiacol (similar to 43.1%) over gold on the TiO2-A-40 nm was about 33 times that (1.3%) over the TiO2-A-40 nm alone. The selectivity of phenolics was 87.1%. The products are mainly phenolic compounds with no aromatics and saturated hydrocarbons such as cyclohexane. The gold particle size ranging from 2.7 to 41 nm and water content were found to significantly affect the Au/TiO2-A-40 nm catalyst activity but not the product selectivity. The reaction rates of 0.26 and 0.91 (min(-1) g-cat(-1) cm(3)) were determined for guaiacol hydrogenation and catechol hydrogenation, respectively. Bimolecular methylation was established as the dominant mechanism for methyl group transfer among the phenolics. Two major pathways of guaiacol hydrogenation to phenolics over the 0.4Au-19 nm/TiO2-A-40 nm are proposed: (1) direct hydrogenation of guaiacol to form phenol and methanol, (2) hydrodehydroxylation of catechol intermediate from the transmethylation between guaiacol and phenol.
语种英语
WOS记录号WOS:000391783200077
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/151867
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Dalian Univ Technol, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, Sch Chem Engn, Dalian 116024, Peoples R China
3.Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China
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GB/T 7714
Mao, Jingbo,Zhou, Jinxia,Xia, Zhi,et al. Anatase TiO2 Activated by Gold Nanoparticles for Selective Hydrodeoxygenation of Guaiacol to Phenolics[J]. ACS CATALYSIS,2017,7(1):695-705.
APA Mao, Jingbo.,Zhou, Jinxia.,Xia, Zhi.,Wang, Zhiguang.,Xu, Zhanwei.,...&Zhang, Z. Conrad.(2017).Anatase TiO2 Activated by Gold Nanoparticles for Selective Hydrodeoxygenation of Guaiacol to Phenolics.ACS CATALYSIS,7(1),695-705.
MLA Mao, Jingbo,et al."Anatase TiO2 Activated by Gold Nanoparticles for Selective Hydrodeoxygenation of Guaiacol to Phenolics".ACS CATALYSIS 7.1(2017):695-705.
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