Behavior of As/AsxSy in Neutral and Oxidizing Atmospheres at High Temperatures—An Overview

Metals

Eduardo Balladares¹  Kristhobal Castro¹  Manuel Pérez-Tello²  Álvaro Aracena³  Oscar Jerez⁴ 

[1] Departamento de Ingeniería Metalúrgica, Facultad de Ingeniería, Universidad de Concepción, Concepcion 4070371, Chile;Departamento de Ingeniería Química y Metalurgia, Universidad de Sonora, Hermosillo 83000, Mexico;Escuela de Ingeniería Química, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2162, Valparaiso 2362854, Chile;Instituto de Geología Económica Aplicada, Universidad de Concepción, Concepcion 4070386, Chile;

关键词: reaction mechanisms;    arsenic sulfide;    thermal decomposition;    oxidation;    roasting;   

DOI  :  10.3390/met12030457

来源: DOAJ

【 摘 要 】

The reaction mechanisms in As and As-S systems during their oxidation and/or thermal decomposition are complex to describe due to the physicochemical characteristics of arsenic and its sulfides; the information highlighted in the literature was analyzed and correlated to determinate the predominant phases and reaction mechanisms during the thermal decomposition and oxidation of arsenic, in its elemental form and in sulfurate phases. As a result of this analysis, it was determined that the predominant phases are mainly composed of allotropies of arsenic, sulfides, and dimers. In addition, reaction mechanisms are provided that describe the behavior of arsenic and its sulfides during its thermal decomposition and oxidation.

【 授权许可】

Unknown