The influence of the chlorine content on the bimetallic particle formation in Pt-Re/Al2O3 studied by STEM/EDX, TPR, H2 chemisorption and model reaction studies

被引：20

作者：

Gjervan, T ^{[1
]}

Prestvik, R

Totdal, B

Lyman, CE

Holmen, A

机构：

[1] Norwegian Univ Sci & Technol, Dept Chem Engn, NTNU, N-7491 Trondheim, Norway

[2] SINTEF, N-7465 Trondheim, Norway

[3] Norwegian Univ Sci & Technol, Dept Phys, NTNU, N-7491 Trondheim, Norway

[4] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

来源：

CATALYSIS TODAY | 2001年 / 65卷 / 2-4期

关键词：

Pt-Re/Al2O3; catalyst; chlorine content; STEM/EDX; TPR; cyclopentane; n-butane;

D O I：

10.1016/S0920-5861(00)00561-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A Pt-Re/Al2O3 reforming catalyst with different levels of chlorine content prior to reduction has been studied by various techniques such as combined STEM/EDX, TPR, H-2 chemisorption and model reactions in order to investigate the effect of the chlorine content on the bimetallic particle formation. TPR, H-2 chemisorption and model reactions show that chlorine inhibits the formation of bimetallic particles in the Pt-Re/Al2O3 catalyst. The effect of chlorine is, however, limited. Direct measurements by STEM/EDX analysis could not reveal any significant differences in alloy formation by varying the chlorine content from 0.6 to 1.5 wt.%. In comparison, the effect of adding water during reduction has a greater impact on the final state of the metal particles. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：163 / 169

页数：7

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