The preparation, characterization, and catalytic behavior of MoVTeNbO catalysts prepared by hydrothermal synthesis

被引：158

作者：

Botella, P ^{[1
]}

Nieto, JML ^{[1
]}

Solsona, B ^{[1
]}

Mifsud, A ^{[1
]}

Márquez, F ^{[1
]}

机构：

[1] Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, Spain

来源：

JOURNAL OF CATALYSIS | 2002年 / 209卷 / 02期

关键词：

oxidation of propane and propene; acrylic acid; acrolein; acrylonitrile; Mo-V-Te-Nb oxide catalysts; hydrothermal synthesis; X-ray diffraction; FTIR; SEM-EDX; XPS;

D O I：

10.1006/jcat.2002.3648

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：

MoVTeNbO catalysts with several Mo/Te/V/Nb (1/0.15-0.7/0-0.5/0-0.9) contents have been prepared by hydrothermal synthesis and tested in the selective oxidation of propane and propene to acrylic acid. Characterization results (XRD, FTIR, SEM-EDX, and XPS) and catalytic tests show important differences, depending on the composition of the catalysts. In this way, several crystalline phases have been observed in the active and selective catalysts, i.e., TeMo(5)O(16), (Mo(0.93)V(0.07))(5)O(14), 3MoO(2)Nb(2)O(5), and/or Nb(0.09)Mo(0.91)O(2.80), and a new TeVMo oxide crystalline phase. Vanadium is the key element in the activation of propane and the selective achievement of acrylic acid while V- and/or Nb-doped MoTe-containing crystalline phases are related to the selective transformation of propene to acrolein/acrylic acid. However, the role of Nb ions is still unclear. Nb-containing MoVTe catalysts present both high activity and high selectivity to acrylic acid. Space time yields of acrylic acid closer than 70 and 600 g(AA) Kg(cat)(-1) h(-1) can be obtained at 380degreesC during the oxidation of propane (keeping selectivities of about 55%) and propene (keeping selectivities of about 80%), respectively. (C) 2002 Elsevier Science (USA).

引用

页码：445 / 455

页数：11

共 36 条

[1] Key aspects of catalyst design for the selective oxidation of paraffins [J].

Albonetti, S ;

Cavani, F ;

Trifiro, F .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1996, 38 (04) :413-438

[2]

ANDRUSHKEVICH TV, 1974, KINET CATAL, V15, P369

[3] Crystal chemistry and phase composition of the MoVTeNbO catalysts for the ammoxidation of propane [J].

Aouine, M ;

Dubois, JL ;

Millet, JMM .

CHEMICAL COMMUNICATIONS, 2001, (13) :1180-1181

[4] Characterization and kinetic studies on the highly active ammoxidation catalyst MoVNbTeOx [J].

Asakura, K ;

Nakatani, K ;

Kubota, T ;

Iwasawa, Y .

JOURNAL OF CATALYSIS, 2000, 194 (02) :309-317

[5] SOLID-STATE EQUILIBRIUM RELATIONS IN TERNARY-SYSTEMS TEO2-MOO3-MOO2-AND TEO2-MOO3-TE [J].

BART, JCJ ;

PETRINI, G ;

GIORDANO, N .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1975, 413 (02) :180-192

[6] MIXED-VALENCE EFFECTS IN TELLURIUM-MOLYBDENUM OXIDES [J].

BART, JCJ ;

CARIATI, F ;

SGAMELLOTTI, A .

INORGANICA CHIMICA ACTA, 1979, 36 (01) :105-112

[7] Oxidative dehydrogenation of short chain alkanes on supported vanadium oxide catalysts [J].

Blasco, T ;

Nieto, JML .

APPLIED CATALYSIS A-GENERAL, 1997, 157 (1-2) :117-142

[8] Preparation, characterisation and catalytic behaviour of a new TeVMoO crystalline phase [J].

Botella, P ;

Nieto, JML ;

Solsona, B .

CATALYSIS LETTERS, 2002, 78 (1-4) :383-387

[9] Selective oxidation of propane to acrylic acid on MoVNbTe mixed oxides catalysts prepared by hydrothermal synthesis [J].

Botella, P ;

Solsona, B ;

Martinez-Arias, A ;

Nieto, JML .

CATALYSIS LETTERS, 2001, 74 (3-4) :149-154

[10] A key to progress: Identification of the state of catalysts during the catalytic reaction [J].

Delmon, B ;

Zeyss, S ;

Gaigneauz, E ;

Ruiz, P .

RESEARCH ON CHEMICAL INTERMEDIATES, 1998, 24 (04) :359-372

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