Oxidative dehydro-isomerization of n-butane over anion-promoted Cr2O3/ZrO2 catalysts

被引：11

作者：

Wang, SB ^{[1
]}

Murata, K ^{[1
]}

Hayakawa, T ^{[1
]}

Hamakawa, S ^{[1
]}

Suzuki, K ^{[1
]}

机构：

[1] Natl Inst Mat & Chem Res, Dept Surface Chem, Tsukuba, Ibaraki 305, Japan

来源：

ENERGY & FUELS | 2001年 / 15卷 / 02期

关键词：

D O I：

10.1021/ef000149w

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The oxidative dehydrogenation and isomerization of n-butane to isobutene was investigated over several Cr2O3/ZrO2 catalysts modified by some acidic anions. The effects of acidic promoters on the Cr2O3/ZrO2 catalysts on the properties and catalytic behavior were studied. The modified Cr2O3/ZrO2 catalysts show varying surface physicochemical properties depending on the nature of anions. Addition of anion promoters reduces the surface area and redox potential and it also induces a remarkable change in acid strength. However, the change in the acid site distributions only occurred on the sulfated zirconia- and tungstated zirconia-supported catalysts. Modification of Cr2O3/ZrO2 by acidic anions decreases the butane conversion while it increases the butene and isobutene selectivities, which can be attributed to the variation of the redox property and acid sites.

引用

页码：384 / 388

页数：5

共 23 条

[1] Isomorphous substitution in ZSM-22 zeolite.: The role of zeolite acidity and crystal size during the skeletal isomerization of n-butene [J].

Asensi, MA ;

Corma, A ;

Martínez, A ;

Derewinski, M ;

Krysciak, J ;

Tamhankar, SS .

APPLIED CATALYSIS A-GENERAL, 1998, 174 (1-2) :163-175

[2]

BAKER BG, 1987, STUD SURF SCI CATAL, V36, P1424

[3] Simultaneous dehydrogenation and isomerization of n-butane to isobutene over ZSM-22 and zinc-modified ZSM-5 zeolites [J].

Byggningsbacka, R ;

Kumar, N ;

Lindfors, LE .

CATALYSIS LETTERS, 1998, 55 (3-4) :173-176

[4] ENERGY-DISTRIBUTION OF SURFACE ACID SITES OF METAL-OXIDES [J].

CARNITI, P ;

GERVASINI, A ;

AUROUX, A .

JOURNAL OF CATALYSIS, 1994, 150 (02) :274-283

[5] Selective oxidation of light alkanes: Interaction between the catalyst and the gas phase on different classes of catalytic materials [J].

Cavani, F ;

Trifirò, F .

CATALYSIS TODAY, 1999, 51 (3-4) :561-580

[6] Chromia/zirconia catalysts with Cr content exceeding the monolayer. A comparison with chromia/alumina and chromia/silica for isobutane dehydrogenation [J].

De Rossi, S ;

Casaletto, MP ;

Ferraris, G ;

Cimino, A ;

Minelli, G .

APPLIED CATALYSIS A-GENERAL, 1998, 167 (02) :257-270

[7] Skeletal isomerization of 1-butene on ferrierite:: deactivation and regeneration conditions [J].

Finelli, ZR ;

Querini, CA ;

Fígoli, NS ;

Comelli, RA .

APPLIED CATALYSIS A-GENERAL, 1999, 187 (01) :115-125

[8]

Hoang M, 1999, CHEMTECH, V29, P45

[9] Skeletal isomerization of n-butene [J].

Houzvicka, J ;

Ponec, V .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1997, 39 (04) :319-344

[10] The role of the acid strength of the catalysts in the skeletal isomerisation of n-butene [J].

Houzvicka, J ;

Nienhuis, JG ;

Ponec, V .

APPLIED CATALYSIS A-GENERAL, 1998, 174 (1-2) :207-212

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