Volatilization of antimonite in nitrogen-oxygen atmospheres

Rafael Padilla, Gustavo Ramirez, Alvaro Aracena, María C. Ruiz

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The vaporization of antimonite (Sb2S3) was investigated in the temperature range of 600-900 °C in a conventional thermogravimetric apparatus. The study was conducted in inert (N2) and oxidizing (N2-O2) atmospheres under various gas flow rates. The results indicated a linear behavior of vaporization of the sample at temperatures above 700 °C. Using the vaporization kinetic constants, activation energy of 124 kJ/mol was determined for the vaporization in nitrogen gas. On the other hand, the weight loss due to volatilization of antimonite in the presence of oxygen occurs up to a certain extent depending on the temperature and partial pressure of oxygen. 20 % of total vaporization occurred at 700 °C while at 900 °C the total vaporization was about 60 %.The incomplete volatilization of antimonite is due to the formation of non-volatile oxides since the weight loss increases with a decrease in partial pressure of oxygen.

Original languageEnglish
Title of host publicationTMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
Pages543-550
Number of pages8
StatePublished - 2010
Externally publishedYes
EventTMS 2010 - 139th Annual Meeting and Exhibition - Seattle, WA, United States
Duration: 14 Feb 201018 Feb 2010

Publication series

NameTMS Annual Meeting
Volume1

Conference

ConferenceTMS 2010 - 139th Annual Meeting and Exhibition
Country/TerritoryUnited States
CitySeattle, WA
Period14/02/1018/02/10

Keywords

  • Antimonite
  • Antimony sulfide
  • Volatilization

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