Synthesis of Three-Dimensionally Ordered Macroporous NiCe Catalysts for Oxidative Dehydrogenation of Propane to Propene

被引：16

作者：

Fang, Kegong ^{[1
]}

Liu, Lulu ^{[2
]}

Zhang, Mingwei ^{[1
]}

Zhao, Lu ^{[1
]}

Zhou, Juan ^{[1
]}

Li, Wenbin ^{[1
]}

Mu, Xiaoliang ^{[1
]}

Yang, Cheng ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

[2] Shanghai Univ, Coll Environm Engn, 333 Nanchen Rd, Shanghai 200444, Peoples R China

[3] Univ Jinan, Coll Chem & Chem Engn, Jinan 250022, Shandong, Peoples R China

来源：

CATALYSTS | 2018年 / 8卷 / 01期

基金：

中国国家自然科学基金;

关键词：

three-dimensionally; macroporous; NiCe; oxidative dehydrogenation; propane; propene; SELECTIVE CATALYSTS; REACTION-MECHANISM; NANOPOROUS WALLS; MIXED OXIDES; PERFORMANCE; ETHANE; CO; COMBUSTION; CERIUM; CEO2;

D O I：

10.3390/catal8010019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three-dimensionally ordered macroporous (3DOM) NiCe catalysts with different Ni/Ce molar ratio were fabricated using the colloidal crystal templating method. The physic-chemical properties of the samples were characterized by various techniques, including N-2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman, and H-2-temperature-programmed reduction (TPR) characterizations. The results revealed that the 3DOM NiCe samples preserved the three-dimensionally ordered macroporous channels with interlinked micro- or mesoporous structure and highly dispersed nickel oxide species in the framework upon different amount of nickel incorporation. In the evaluation of the oxidative dehydrogenation (ODH) of propane, the 3DOM NiCe catalysts exhibited higher selectivity and yield to propene than the amorphous NiCe catalyst. An optimum yield of propene of 11.9% with the 30.3% propane conversion at 375 degrees C was obtained over the 3DOM 2NiCe catalyst. Combining XRD, TPR, and Raman analysis, it could be found that the nickel incorporation in CeO2 lattice produced a high concentration of oxygen vacancies that were the active sites for the oxidative dehydrogenation of propane. Besides this, the 3DOM structure promoted the rapid diffusion of the reactants and products-favorable for the generation of propene in the ODH of propane.

引用

页数：12

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