Change of critical supersaturation ratio in CaCO3 scale formation

Xiaoshuang Yin, Wenzhong Yang, Yongming Tang, Ying Liu, Chen Thou

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Abstract

The effects of solution temperature, contact time of fouling ions, type and concentration of scale inhibitors on critical supersaturation ratio (CSSR) of CaCO3 solution were evaluated. The change of surface free energy during crystallizing of CaCO3 in presence of scale inhibitors was studied according to the light of homogeneous nucleation theory. In the presence of aminotrimethylene phosphonic acid (ATMP), CSSR decreased more with the increase of temperature than that in the presence of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) or polyacrylic acid (PAA). The effect of CaCO3 nucleation with PBTCA and ATMP on surface free energy was more obvious than that with PAA. Crystalline form of CaCO3 precipitate transformed from calcite in main into vaterite in main in the presence of scale inhibitors.

Original languageEnglish
Pages (from-to)467-471
Number of pages5
JournalPetrochemical Technology
Volume36
Issue number5
StatePublished - 15 May 2007

Keywords

  • 2 - Phosphonobutane - 1,2,4 - tricarboxylic acid
  • Aminotrimethylene phosphonic acid
  • Calcium carbonate
  • Critical supersaturation ratio
  • Poly (acrylic acid)
  • Scale - inhibitor

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