Kinetics on chlorination process of La2O3 and CeO2 by ammonium chloride

Wen Zhong Shi, Xin Zhang, Yong He Zhao, Jing Yan Wang, Guo Cai Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Using ammonium chloride (NH4Cl) as a chlorinating agent, the effects of chlorinating temperature, time and NH4Cl dosage on chlorination of La2O3 and CeO2, and the thermal decomposition of LaCl3·7H2O and CeCl3·7H2O were examined. The results show that NH4Cl directly participates the chlorination reaction, and HCl from pyrolysis of NH4Cl also contributes to the chlorination reaction. CeCl3 and LaCl3 can cause gas phase hydrosols formation or oxidation reaction which generates LaOCl, CeOCl and CeO2. The apparent activation energies of La2O3 and CeO2 chlorination reactions, Ea, are 43.73 and 140.67 kJ/mol respectively. The process is mainly controlled by the interfacial chemical reaction.
Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalGuocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering
Volume5
Issue number1
Publication statusPublished - 1 Feb 2005
Externally publishedYes

Keywords

  • CeO 2
  • Chlorination
  • Kinetics
  • La O 2 3
  • Reaction process

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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