The oxidative dehydrogenation of propane over potassium-promoted molybdenum oxide/sol-gel zirconia catalysts

被引：25

作者：

Koc, SN ^{[1
]}

Gurdag, G

Geissler, S

Guraya, M

Orbay, M

Muhler, M

机构：

[1] Univ Istanbul, Fac Engn, Dept Chem Engn, TR-34320 Istanbul, Turkey

[2] Ruhr Univ Bochum, Fac Chem, Lab Ind Chem, D-44780 Bochum, Germany

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2005年 / 225卷 / 02期

关键词：

oxidative dehydrogenation; molybdenum oxide; zirconia; sol-gel; alkali promotion;

D O I：

10.1016/j.molcata.2004.09.009

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：

The effect of potassium loading on the structural and catalytic properties of MoOx/ZrO2 catalysts for oxidative dehydrogenation of propane was investigated. Catalysts have been prepared by modified sol-gel method, and they were characterized by nitrogen physisorption, XRD, FT-Raman spectroscopy, XPS and temperature-programmed reduction (TPR). Catalytic activity measurements have been carried out between 400 and 530degreesC under atmospheric pressure. It was observed that potassium addition prevented crystalline Zr(MoO4)(2) formation, suppressing the interaction of molybdenum oxide and zirconia phases, and it also favored the formation of three-dimensional molybdenum oxide and two-dimensional polymolybdates. Both propylene selectivity and yield were enhanced with a certain amount of potassium addition. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：197 / 202

页数：6

共 33 条

[1] Characterization and performance for propane oxidative dehydrogenation of Li-modified MoO3/Al2O3 catalysts [J].

Abello, MC ;

Gomez, MF ;

Casella, M ;

Ferretti, OA ;

Bañares, MA ;

Fierro, JLG .

APPLIED CATALYSIS A-GENERAL, 2003, 251 (02) :435-447

[2] Control of the textural properties of zirconium oxide [J].

Afanasiev, P ;

Thiollier, A ;

Breysse, M ;

Dubois, JL .

TOPICS IN CATALYSIS, 1999, 8 (3-4) :147-160

[3] TEMPERATURE-PROGRAMMED REDUCTION OF MOO3 AND MOO2 [J].

ARNOLDY, P ;

DEJONGE, JCM ;

MOULIJN, JA .

JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (21) :4517-4526

[4] On the partial oxidation of propane and propylene on mixed metal oxide catalysts [J].

Bettahar, MM ;

Costentin, G ;

Savary, L ;

Lavalley, JC .

APPLIED CATALYSIS A-GENERAL, 1996, 145 (1-2) :1-48

[5] High temperature calcined K-MoO3/γ-Al2O3 catalysts for mixed alcohols synthesis from syngas:: Effects of Mo loadings [J].

Bian, GZ ;

Fan, L ;

Fu, YL ;

Fujimoto, K .

APPLIED CATALYSIS A-GENERAL, 1998, 170 (02) :255-268

[6]

BLASCO T, 1997, APPL CATAL A-GEN, V157, P142

[7] Oxidative dehydrogenation of propane over Mg-Mo-O catalysts [J].

Cadus, LE ;

Abello, MC ;

Gomez, MF ;

Rivarola, JB .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1996, 35 (01) :14-18

[8]

CAUQIU MA, 1992, J NONCRYST SOLIDS, V147, P723

[9] Structure and properties of oxidative dehydrogenation catalysts based on MoO3/Al2O3 [J].

Chen, K ;

Xie, S ;

Bell, AT ;

Iglesia, E .

JOURNAL OF CATALYSIS, 2001, 198 (02) :232-242

[10] Alkali effects on molybdenum oxide catalysts for the oxidative dehydrogenation of propane [J].

Chen, KD ;

Xie, SB ;

Bell, AT ;

Iglesia, E .

JOURNAL OF CATALYSIS, 2000, 195 (02) :244-252

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