A thermogravimetric study of copper chlorination

被引：23

作者：

De Micco, G.

Bohe, A. E.

Pasquevich, D. M.

机构：

[1] Ctr Atom Bariloche, CNEA, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Nacl Cuyo, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

[4] Univ Nacl Comahue, Ctr Reg Univ Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 437卷 / 1-2期

关键词：

transition metals; gas-solid reactions; kinetics;

D O I：

10.1016/j.jallcom.2006.08.003

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：

The chlorination of metallic copper has been studied by thermogravimetry in the range of temperatures between 100 and 800 degrees C. The starting temperature for the reaction of copper with chlorine is determined at about 150 degrees C by non-isothermal measurements. For temperatures above 400 degrees C a methodology of heating in argon has been applied to decouple two processes taking place: decomposition of CuCl2 and volatilization of CuCl. These experiments allow to determine the amounts of CuCl, CuCl2 and Cu3Cl3(g) formed at each temperature. The activation energies for volatilization are obtained in chlorine and argon atmospheres. Finally, for temperatures below 250 degrees C the amounts of CuCl and CuCl2 formed are calculated with mass balances. Observations in scanning electron microscopy (SEM) reveal that the different chlorides are formed in layers. A possible mechanism for the low temperature reaction is presented. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：351 / 359

页数：9

共 19 条

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