Influence of Levulinic Acid Hydrogenation on Aluminum Coordination in Zeolite-Supported Ruthenium Catalysts: A(27)Al 3QMAS Nuclear Magnetic Resonance Study

doi:10.1002/cphc.201700785

	Influence of Levulinic Acid Hydrogenation on Aluminum Coordination in Zeolite-Supported Ruthenium Catalysts: A(27)Al 3QMAS Nuclear Magnetic Resonance Study
	Luo, Wenhao 1,2; van Eck, Ernst R. H.3; Bruijnincx, Pieter C. A.1; Weckhuysen, Bert M.1
刊名	CHEMPHYSCHEM
	2018-02-19
卷号	19 期号:4 页码:379-385
关键词	Aluminum Hydrogenation Levulinic Acid Nuclear Magnetic Resonance Zeolites
ISSN号	1439-4235
DOI	10.1002/cphc.201700785
文献子类	Article
英文摘要	The influence of a highly oxygenated, polar protic reaction medium, that is, levulinic acid in 2-ethylhexanoic acid, on the dealumination of two zeolite-supported ruthenium catalysts, namely Ru/H- and Ru/H-ZSM-5, has been investigated by Al-27 triple-quantum magic-angle spinning nuclear magnetic resonance spectroscopy (3QMAS NMR). Upon use of these catalysts in the hydrogenation of levulinic acid, the heterogeneity in aluminum speciation is found to increase for both Ru/H-ZSM-5 and Ru/H-. For Ru/H-ZSM-5, the symmetric, tetrahedral framework aluminum species (FAL) were found to be mainly converted into distorted tetrahedral FAL species, with limited loss of aluminum to the solution by leaching. A severe loss of both FAL and extra-framework aluminum (EFAL) species into the liquid phase was observed for Ru/H- instead. The large decrease in tetrahedral FAL species, in particular, results in a significant decrease in strong acid sites, as corroborated by Fourier transform infrared spectroscopy (FT-IR). This decrease in acidity, evidence of the inferior stability of the strongly acidic sites in Ru/H- relative to Ru/H-ZSM-5 under the applied conditions, is considered as the main reason for differences seen in catalyst performance.
WOS关键词	MQ MAS NMR ; ANGLE-SPINNING NMR ; SOLID-STATE NMR ; AL-27 MAS ; EXTRAFRAMEWORK ALUMINUM ; BIFUNCTIONAL CATALYSTS ; GAMMA-VALEROLACTONE ; QUADRUPOLAR NUCLEI ; FAUJASITE ZEOLITE ; BEA ZEOLITE
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000425458200006
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/168710]
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	Bruijnincx, Pieter C. A.; Weckhuysen, Bert M.
作者单位	1.Univ Utrecht, Inorgan Chem & Catalysis, Debye Inst Nanomat Sci, Univ Weg 99, NL-3584 CG Utrecht, Netherlands 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Zhongshan Rd 457, Dalian 116023, Peoples R China 3.Radboud Univ Nijmegen, Inst Mol & Mat, Heyendaalsweg 135, NL-6525 AJ Nijmegen, Netherlands
推荐引用方式 GB/T 7714	Luo, Wenhao,van Eck, Ernst R. H.,Bruijnincx, Pieter C. A.,et al. Influence of Levulinic Acid Hydrogenation on Aluminum Coordination in Zeolite-Supported Ruthenium Catalysts: A(27)Al 3QMAS Nuclear Magnetic Resonance Study[J]. CHEMPHYSCHEM,2018,19(4):379-385.
APA	Luo, Wenhao,van Eck, Ernst R. H.,Bruijnincx, Pieter C. A.,&Weckhuysen, Bert M..(2018).Influence of Levulinic Acid Hydrogenation on Aluminum Coordination in Zeolite-Supported Ruthenium Catalysts: A(27)Al 3QMAS Nuclear Magnetic Resonance Study.CHEMPHYSCHEM,19(4),379-385.
MLA	Luo, Wenhao,et al."Influence of Levulinic Acid Hydrogenation on Aluminum Coordination in Zeolite-Supported Ruthenium Catalysts: A(27)Al 3QMAS Nuclear Magnetic Resonance Study".CHEMPHYSCHEM 19.4(2018):379-385.