HIGH-RESOLUTION ELECTRON-MICROSCOPY STUDY OF THE CARBON DEPOSIT MORPHOLOGY ON NICKEL-CATALYSTS

被引：76

作者：

TRACZ, E

SCHOLZ, R

BOROWIECKI, T

机构：

[1] MARIA CURIE SKLODOVSKA UNIV, DEPT CHEM, 3 M CURIE SKLODOVSKA SQ, PL-20031 LUBLIN, POLAND

[2] MARIA CURIE SKLODOVSKA UNIV, CENT LAB, PL-20031 LUBLIN, POLAND

[3] ACAD SCI GDR, INST SOLID STATE PHYS & ELECTRON MICROSCOPY, O-4010 HALLE, GERMANY

来源：

APPLIED CATALYSIS | 1990年 / 66卷 / 01期

关键词：

carbon deposition; catalyst characterization (HREM); coke formation; nickel;

D O I：

10.1016/S0166-9834(00)81633-4

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：

HREM (high resolution electron microscopy) was used in the study of the structure of carbon deposits obtained on Ni/Al2O3 and Ni/MgO catalysts during steam reforming of n-butane in the temperature range 673 to 953 K. Three kinds of deposits were found on both catalysts: true filaments, tubes and shells. The forms created and their degree of graphitization depend on the reaction temperature. The shape of the catalyst particles has a strong influence on the arrangement of the carbon layers in the deposits. In connection with the observed forms of the deposits the mechanism of the shape transformation of metal particles is discussed. © 1990.

引用

页码：133 / 147

页数：15

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