INFLUENCE OF PREPARATION CONDITIONS ON THE STRUCTURE AND CATALYTIC PROPERTIES OF SO42-/ZRO2 SUPERACID CATALYSTS

被引：189

作者：

CORMA, A

FORNES, V

JUANRAJADELL, MI

NIETO, JML

机构：

[1] Institutode Tecnología Química, U.P.V.-C.S.I.C., Universidad Politécnica, Camino de Vera s/n

来源：

APPLIED CATALYSIS A-GENERAL | 1994年 / 116卷 / 1-2期

关键词：

CATALYST CHARACTERIZATION (IR TPD); PREPARATION; SOLID SUPERACIDS; SULFATE DOPED ZIRCONIA; TEMPERATURE-PROGRAMMED DESORPTION OF AMMONIA;

D O I：

10.1016/0926-860X(94)80286-6

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：

SO42-/ZrO2 samples were prepared by impregnation of hydrous zirconium oxides with 0.5 M H2SO4 solutions. It was found that the pH of precipitation of the precursor Zr(OH), has a strong influence on the structure of crystalline ZrO2 and on the catalytic properties of the SO42-/ZrO2 for the isomerization of n-butane. The nature and strength of acid sites in SO42-/ZrO2 samples were studied by infrared spectra of absorbed pyridine and by temperature-programmed desorption (TPD) of ammonia. Acidity and catalytic results have been compared with those obtained on an acid zeolite as H-Mordenite. It has been found that infrared spectra of pyridine can not be used for the determination of the superacid character of SO42-/ZrO2 However, the NH3-TPD technique shown that in the case of SO42-/ZrO2 samples there are superacid sites in which the NH3-desorption peak appears at about 815 K. A correlation between the number of those superacid sites and the activity for the isomerization of n-butane has been observed.

引用

页码：151 / 163

页数：13

共 26 条

[1] PREPARATION OF SUPERACIDS BY METAL-OXIDES AND THEIR CATALYTIC ACTION
ARATA, K
HINO, M
[J]. MATERIALS CHEMISTRY AND PHYSICS, 1990, 26 (3-4) : 213 - 237
[2] Arata K, 1990, ADV CATAL, V37, P165, DOI DOI 10.1016/S0360-0564(08)60365-X
[3] NATURE OF ACIDIC SITES ON SILICA-ALUMINA . CHARACTERIZATION BY INFRARED SPECTROSCOPIC STUDIES OF TRIMETHYLAMINE + PYRIDINE CHEMISORPTION
BASILA, MR
RHEE, KH
KANTNER, TR
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (11) : 3197 - &
[4] BESITEL M, 1988, MATER CHEM PHYS, V19, P147
[5] SUPERACID AND CATALYTIC PROPERTIES OF SULFATED ZIRCONIA
CHEN, FR
COUDURIER, G
JOLY, JF
VEDRINE, JC
[J]. JOURNAL OF CATALYSIS, 1993, 143 (02) : 616 - 626
[6] CHEN FR, 1991, S ALKYLATION AROMATI, V36, P878
[7] SOLID CATALYSTS TREATED WITH ANIONS - SYNTHESIS OF SOLID SUPERACID CATALYST WITH ACID STRENGTH OF H0 LESS-THAN-OR-EQUAL-TO-16.04
HINO, M
ARATA, K
[J]. JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1980, (18) : 851 - 852
[8] A HIGHLY-ACTIVE SOLID SUPERACID CATALYST FOR N-BUTANE ISOMERIZATION - A SULFATED OXIDE CONTAINING IRON, MANGANESE AND ZIRCONIUM
HSU, CY
HEIMBUCH, CR
ARMES, CT
GATES, BC
[J]. JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1992, (22) : 1645 - 1646
[9] MECHANISM OF ACIDITY GENERATION ON SULFUR-PROMOTED METAL-OXIDES
JIN, T
YAMAGUCHI, T
TANABE, K
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (20) : 4794 - 4796
[10] INVESTIGATION OF THE DISTRIBUTION OF ACIDITY IN ZEOLITES BY TEMPERATURE-PROGRAMMED DESORPTION OF PROBE MOLECULES .1. DEALUMINATED MORDENITES
KARGE, HG
DONDUR, V
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (02) : 765 - 772

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