DEACTIVATION OF A PT/AL2O3 CATALYST DURING THE OXIDATION OF HEXAFLUOROPROPYLENE

被引：17

作者：

FARRIS, MM ^{[1
]}

KLINGHOFFER, AA ^{[1
]}

ROSSIN, JA ^{[1
]}

TEVAULT, DE ^{[1
]}

机构：

[1] USA,CTR CHEM RES DEV & ENGN,ABERDEEN PROVING GROUND,MD 21010

来源：

CATALYSIS TODAY | 1992年 / 11卷 / 04期

关键词：

D O I：

10.1016/0920-5861(92)80040-T

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A 5% Pt/Al2O3 catalyst was exposed to hexafluoropropylene (HFP) at concentrations between 500 and 4,500 ppm in humid air at temperatures between 300 and 400-degrees-C. The catalyst was found to deactivate over all conditions investigated. Analysis of the catalyst following reaction exposure indicated that the catalyst support had been transformed to aluminum fluoride, and that virtually all of the support's surface area had been lost. The observed deactivation was attributed to degradation of the catalyst support, caused by a reaction between the alumina support and product hydrofluoric acid. Under some conditions, the rate of catalytic deactivation was found to be proportional to the number of moles of hexafluoropropylene reacted.

引用

页码：501 / 516

页数：16

共 18 条

[1] CATALYTIC AND THERMAL DECOMPOSITION OF ISOPROPYL METHYL FLUOROPHOSPHONATE [J].

BAIER, RW ;

WELLER, SW .

INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1967, 6 (03) :380-&

[2] A CHEMISORPTION AND XPS STUDY OF BIMETALLIC PT-SN/AL2O3 CATALYSTS [J].

BALAKRISHNAN, K ;

SCHWANK, J .

JOURNAL OF CATALYSIS, 1991, 127 (01) :287-306

[3] VALENCE STATE AND INTERACTION OF PLATINUM AND GERMANIUM ON GAMMA-AL2O3 INVESTIGATED BY X-RAY PHOTOELECTRON-SPECTROSCOPY [J].

BOUWMAN, R ;

BILOEN, P .

JOURNAL OF CATALYSIS, 1977, 48 (1-3) :209-216

[4]

BRETHERICK L, 1985, HDB REACTIVE CHEM HA, P1054

[5] THE INHIBITION OF HYDROCARBON OXIDATION OVER SUPPORTED PRECIOUS METAL-CATALYSTS [J].

CULLIS, CF ;

WILLATT, BM .

JOURNAL OF CATALYSIS, 1984, 86 (01) :187-200

[6]

EVANOFF SP, 1990, CHEM ENG PROG, V86, P51

[7]

GUO I, 1988, CATALYSIS 1987, P21

[8] OXIDATION OF ETHYLENE OVER A SUPPORTED PLATINUM CATALYST [J].

HAWKINS, JR ;

WANKE, SE .

CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1979, 57 (05) :621-626

[9] XPS INVESTIGATIONS OF PT AND RH SUPPORTED ON GAMMA-AL2O3 AND TIO2 [J].

HUIZINGA, T ;

VANTBLIK, HFJ ;

VIS, JC ;

PRINS, R .

SURFACE SCIENCE, 1983, 135 (1-3) :580-596

[10]

LAKASU Y, 1982, J AM CHEM SOC, V104, P5249

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