Rigorous modeling of the kinetics of calcium carbonate deposit formation

Raviv Segev, David Hasson*, Raphael Semiat

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The complexity of CaCO 3 deposit formation on a flow surface arises from the need to take into account the multicomponent transport of all ionic species involved in the carbonic system. Several semitheoretical and empirical models are available. This article presents a rigorous kinetic model that takes into account the diffusional transport of all species involved in CaCO 3 wall deposition under turbulent flow as well as the kinetics of the CaCO 3 crystallization reaction. Conditions under which high- and low-pH simplified expressions may be used are evaluated. It is shown that the simplified precipitation rate equations provide results within 10% of the rigorous solution when the high-pH expression is applied for solutions at pH levels above 9.5, and the low-pH expression is applied for solutions at pH levels below 7.6.

Original languageEnglish
Pages (from-to)1222-1229
Number of pages8
JournalAICHE Journal
Volume58
Issue number4
DOIs
StatePublished - Apr 2012
Externally publishedYes

Keywords

  • CaCO precipitation kinetics
  • Multicomponent ionic diffusion
  • Rigorous analysis
  • Scale deposition
  • Simplified models

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