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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
关键词Ethylene Oxidation Acetic Acid Pd-siw12/sio2 Pd Dispersion
刊名JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
2009-09-01
DOI10.1016/j.molcata.2009.06.008
310期:1-2页:138-143
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]SELECTIVE OXIDATION ; SKELETAL ISOMERIZATION ; VAPOR-PHASE ; N-HEPTANE ; PALLADIUM ; ETHENE ; CONVERSION ; ZIRCONIA ; HYDROGEN
英文摘要The 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.
语种英语
WOS记录号WOS:000269426900017
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141471
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 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
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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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