Differential effect of coke burning with oxygen or ozone on Pt-Re interaction in Pt-Re/Al2O3

被引：0

作者：

Pieck, CL ^{[1
]}

Parera, JM ^{[1
]}

机构：

[1] CONICET, FIQ UNL, INCAPE, RA-3000 Santa Fe, Argentina

来源：

CATALYST DEACTIVATION 1997 | 1997年 / 111卷

关键词：

D O I：

暂无

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：

Pt-Re/Al2O3 catalysts were prepared by different methods (coimpregnation, successive impregnations and catalytic reduction). The degree of Pt-Re interaction on the catalysts was indirectly determined by the hydrogenolysis of cyclopentane. The deposition of coke was performed at 500 degrees C and atmospheric pressure. The modifications in the metallic phase when eliminating coke by combustion with oxygen at high temperature (450 degrees C) and with ozone at low temperature (125 degrees C) were studied. The regeneration with ozone enabled the elimination of coke without modifying the metal phase of the catalyst, keeping the degree of interaction between Pt and Re and maintaining Pt dispersion nearly constant. The regeneration with oxygen produced the elimination of Pt-Re interaction and an increase in the dispersion of Pt.

引用

页码：433 / 438

页数：6

共 10 条

[1] ON THE MECHANISM FOR THE PLATINUM-CATALYZED REDUCTION OF RHENIUM IN PTRE/GAMMA-AL2O3 [J].

AUGUSTINE, SM ;

SACHTLER, WMH .

JOURNAL OF CATALYSIS, 1989, 116 (01) :184-194

[2] STRUCTURE CHARACTERIZATION OF PLATINUM/ALUMINA, RHENIUM/ALUMINA, AND PLATINUM-RHENIUM/ALUMINA CATALYSTS [J].

CHEN, LY ;

NI, YQ ;

ZANG, JL ;

LIN, LW ;

LUO, XH ;

CHENG, S .

JOURNAL OF CATALYSIS, 1994, 145 (01) :132-140

[3] SURFACE-AREA MEASUREMENT OF PLATINUM RHENIUM ALUMINA .2. EFFECTS OF CATALYST PRETREATMENT [J].

ISAACS, BH ;

PETERSEN, EE .

JOURNAL OF CATALYSIS, 1984, 85 (01) :8-15

[4] ENSEMBLING AND MONOLAYER PARAMETERS FOR THE DEHYDROGENATION OF CYCLOHEXANE OVER PT/AL2O3 CATALYST [J].

KRISHNASAMY, V ;

BALASUBRAMANIAN, K .

JOURNAL OF CATALYSIS, 1984, 90 (02) :351-357

[5] EFFECT OF CHLORINE IN THE FORMATION OF PTRE ALLOYS IN PTRE/AL2O3 CATALYSTS [J].

MALET, P ;

MUNUERA, G ;

CABALLERO, A .

JOURNAL OF CATALYSIS, 1989, 115 (02) :567-579

[6] PLATINUM RHENIUM INTERACTION - A TEMPERATURE-PROGRAMMED REDUCTION STUDY [J].

MIEVILLE, RL .

JOURNAL OF CATALYSIS, 1984, 87 (02) :437-442

[7]

MY NL, 1989, CHEM ENG J, V40, P15

[8] Influence of Pt-Re interaction on activity and selectivity of reforming catalysts [J].

Pieck, CL ;

Marecot, P ;

Querini, CA ;

Parera, JM ;

Barbier, J .

APPLIED CATALYSIS A-GENERAL, 1995, 133 (02) :281-292

[9]

PIECK CL, 1994, ACT 14 S IB CAT CONC, P263

[10]

PIECK CL, THESIS POITIERS U FR

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