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Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid
Xu, Shuliang1,2; Wang, Lixia1,2; Chu, Wenling1; Yang, Weishen1
KeywordEthylene Oxidation Acetic Acid Pd-siw12/sio2 Pd Dispersion
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
2009-09-01
DOI10.1016/j.molcata.2009.06.008
Volume310Issue:1-2Pages:138-143
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordSELECTIVE OXIDATION ; SKELETAL ISOMERIZATION ; VAPOR-PHASE ; N-HEPTANE ; PALLADIUM ; ETHENE ; CONVERSION ; ZIRCONIA ; HYDROGEN
AbstractThe effects of palladium precursors (PdCl2, (NH4)(2)PdCl4, Pd(NH3)(2)Cl-2, Pd(NO3)(2) and Pd(CH3COO)(2)) on the catalytic properties in the selective oxidation of ethylene to acetic acid have been investigated for 1.0wt% Pd-30wt% H4SiW12O40/SiO2. The structures of the catalysts were characterized using X-ray diffraction, N-2 adsorption, H-2-pulse chemical adsorption, infrared spectrometry of the adsorbed pyridine, H-2 temperature-programmed reduction and X-ray photoelectron spectroscopy. The present study demonstrates that the different palladium precursors can lead to the significant changes in the dispersion of palladium. It is found that Pd dispersion decreases as follows: PdCl2>(NH4)(2)PdCl4>Pd(NO3)(2)>Pd(NH3)(2)Cl-2>Pd(C2H3O2)(2), which is nearly identical to the catalytic activity. This indicates that the dispersion of palladium plays an important role in the catalytic activity. Furthermore, density of Lewis (L) and Bronsted (B) acid sites are also strongly dependent on the palladium precursors. it is also demonstrated that an effective catalyst should possess a well combination of Bronsted acid sites with dispersion of palladium. (C) 2009 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000269426900017
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/141471
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xu, Shuliang,Wang, Lixia,Chu, Wenling,et al. Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2009,310(1-2):138-143.
APA Xu, Shuliang,Wang, Lixia,Chu, Wenling,&Yang, Weishen.(2009).Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,310(1-2),138-143.
MLA Xu, Shuliang,et al."Influence of Pd precursors on the catalytic performance of Pd-H4SiW12O40/SiO2 in the direct oxidation of ethylene to acetic acid".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 310.1-2(2009):138-143.
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