Hydroconversion of hydrocarbons over Ru-containing supported catalysts prepared by metal vapor method

被引：18

作者：

Akhmedov, VM ^{[1
]}

Al-Khowaiter, SH ^{[1
]}

机构：

[1] King Abdulaziz City Sci & Technol, Petr & Petrochem Inst, Riyadh 11442, Saudi Arabia

来源：

APPLIED CATALYSIS A-GENERAL | 2000年 / 197卷 / 02期

关键词：

Ru-supported catalysts; carbon-carbon bond cleavage; metal vapor; zeolite; -; ZSM-5; hydroconversion; low temperature;

D O I：

10.1016/S0926-860X(99)00483-4

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：

Some mono- and bimetallic-supported Ru/ZSM-5, Ru-Re/ZSM-5, Ru-Kh/ZSM-5. Ni-Ru/ZSM-5 and Ru-Ni/ZSM-5 catalysts were prepared by metal vapor method. The carbon-carbon cleavage activity and the selectivity of prepared catalysts were investigated in hydroconversion of alkanes (n-pentane, a-hexane, n-heptane, 2-methylpentane) and cycloalkanes (cyclopentane, cyclohexane, methylcyclopentane). These catalysts demonstrate extremely high C-C bond splitting activity in tested hydrocarbons. The magnitude of the effect for methylcyclopentane reaches a factor of about 70 at 393 K in comparison with the activity of known Ru/TiO2 at 433 K. The increase in activity for the metal vapor method prepared Ru-containing catalysts is due mainly to the presence of highly dispersed ruthenium particles on a zeolite support. The selectivity of Ru/ZSM-5 remains in a range expected for known well-dispersed Ru-containing catalysts, whereas these values can be modified to a large extent by addition of a second metal to the mono-metallic samples: Ru-Re/ZSM-5 shows high selectivity in the isomerization of n-hexane to 2- and 3-methylpentanes, while Ni-Ru/ZSM-5 ruptures mostly the central carbon-carbon bond in the n-heptane molecule. The rates of hydroconversion of tested hydrocarbons, based on a lodged ruthenium, on most of the bimetallic samples are much higher than over Ru/ZSM-5. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：201 / 212

页数：12

共 32 条

[21] CATALYTIC AND REGIOSELECTIVE ACYLATION OF AROMATIC HETEROCYCLES USING CARBON-MONOXIDE AND OLEFINS [J].

MOORE, EJ ;

PRETZER, WR ;

OCONNELL, TJ ;

HARRIS, J ;

LABOUNTY, L ;

CHOU, L ;

GRIMMER, SS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (14) :5888-5890

[22]

PWERTHUISOT C, 1994, J AM CHEM SOC, V116, P3647

[23]

SAJKOWSKI DJ, 1990, J CATAL, V125, P549

[24] CARBONYLATION OF HYDROCARBONS VIA C-H ACTIVATION CATALYZED BY RHCL(CO)(PME3)2 UNDER IRRADIATION [J].

SAKAKURA, T ;

SODEYAMA, T ;

SASAKI, K ;

WADA, K ;

TANAKA, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (20) :7221-7229

[25] STRUCTURE SENSITIVITY OF REACTIONS BETWEEN CYCLOPROPANE AND HYDROGEN ON SUPPORTED RUTHENIUM CATALYSTS [J].

SCHWANK, J ;

LEE, JY ;

GOODWIN, JG .

JOURNAL OF CATALYSIS, 1987, 108 (02) :495-500

[26]

SINFELT JH, 1969, CATALY REV, V3, P175

[27] CO HYDROGENATION ON MO-PROMOTED RH/SIO2 AND RH/ZRO2 DERIVED FROM METAL-CARBONYL CLUSTERS [J].

TRUNSCHKE, A ;

EWALD, H ;

MIESSNER, H ;

MARENGO, S ;

MARTINENGO, S ;

PINNA, F ;

ZANDERIGHI, L .

JOURNAL OF MOLECULAR CATALYSIS, 1992, 74 (1-3) :365-377

[28] OLEFIN HYDROFORMYLATION AND SELECTIVE HYDROGENATION OF ACETALDEHYDE ON MO-PROMOTED RH/SIO2 CATALYSTS DERIVED FROM METAL SALT AND HETERONUCLEAR CLUSTER PRECURSORS [J].

TRUNSCHKE, A ;

BOTTCHER, HC ;

FUKUOKA, A ;

ICHIKAWA, M ;

MIESSNER, H .

CATALYSIS LETTERS, 1991, 8 (2-4) :221-228

[29]

Volpin M. E., 1986, P 5 INT S CAT NOV, P139

[30] TIME-RESOLVED IR SPECTROSCOPY IN LIQUID RARE-GASES - DIRECT RATE MEASUREMENT OF AN INTERMOLECULAR ALKANE C-H OXIDATIVE ADDITION-REACTION [J].

WEILLER, BH ;

WASSERMAN, EP ;

BERGMAN, RG ;

MOORE, CB ;

PIMENTEL, GC .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1989, 111 (21) :8288-8290

← 1 2 3 4 →