Kinetic and thermodynamic study of CdCl2 volatilizing in air atmosphere

Rundong Li, Yanlong Li, Lei Wang, Xuehui Tian, Xin Ke, Yaoxin Liu

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

Abstract

Med at the characteristic of MSWI fly ash in China that high content of chlorine, the volatilization of cadmium chloride (CdCl2) was studied. Firstly the volatilization under air atmosphere of cadmium chloride (CdCl 2) was modeled employing Gibbs free energy criterion, Subsequently, the heating rate, that influenced the volatilization of CdCl2 was characterized on basis of experimental observations derived by means of a high temperature TG-DTA system. With the results of the thermodynamic analysis this paper also worked out kinetic models of the volatilization of CdCl2 The results show that: between the temperature bound (300-1200K), the volatilization process of CdCl2 mainly is the phase change of CdCl2 crystal, it also creates zinc oxide (CdO) indistinctively; the volatilization curves shift with increasing heating rate towards higher temperatures, and the volatilization ratio and temperature eigenvalue increase on certain degree; a 1/2-order kinetic model can describe the volatilization reaction accurately.

Original languageEnglish
Title of host publicationProceedings of the 2nd International Conference on Asian-European Environmental Technology and Knowledge Transfer
Pages392-396
Number of pages5
StatePublished - 2008
Externally publishedYes
Event2nd International Conference on Asian-European Environmental Technology and Knowledge Transfer - Hefei, China
Duration: 5 Jun 20086 Jun 2008

Publication series

NameProceedings of the 2nd International Conference on Asian-European Environmental Technology and Knowledge Transfer

Conference

Conference2nd International Conference on Asian-European Environmental Technology and Knowledge Transfer
Country/TerritoryChina
CityHefei
Period5/06/086/06/08

Keywords

  • CdCl
  • Kinetic model
  • Phase change
  • Therrnodynamics
  • Volatilization

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