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Influence of Levulinic Acid Hydrogenation on Aluminum Coordination in Zeolite-Supported Ruthenium Catalysts: A(27)Al 3QMAS Nuclear Magnetic Resonance Study
Luo, Wenhao1,2; van Eck, Ernst R. H.3; Bruijnincx, Pieter C. A.1; Weckhuysen, Bert M.1
KeywordAluminum Hydrogenation Levulinic Acid Nuclear Magnetic Resonance Zeolites
Source PublicationCHEMPHYSCHEM
2018-02-19
ISSN1439-4235
DOI10.1002/cphc.201700785
Volume19Issue:4Pages:379-385
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS Research AreaChemistry ; Physics
WOS KeywordMQ MAS NMR ; ANGLE-SPINNING NMR ; SOLID-STATE NMR ; AL-27 MAS ; EXTRAFRAMEWORK ALUMINUM ; BIFUNCTIONAL CATALYSTS ; GAMMA-VALEROLACTONE ; QUADRUPOLAR NUCLEI ; FAUJASITE ZEOLITE ; BEA ZEOLITE
AbstractThe 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.
Language英语
WOS IDWOS:000425458200006
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/168711
Collection中国科学院大连化学物理研究所
Corresponding AuthorBruijnincx, Pieter C. A.; Weckhuysen, Bert M.
Affiliation1.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
Recommended Citation
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.
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