Polymorph and morphology of CaCO<sub>3</sub> in relation to precipitation conditions in a bubbling system

Jian Sun; Lisheng Wang; Dongfang Zhao

doi:10.1016/j.cjche.2016.12.004

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Polymorph and morphology of CaCO₃ in relation to precipitation conditions in a bubbling system

Materials and Product Engineering | Updated：2026-01-06

- Polymorph and morphology of CaCO₃ in relation to precipitation conditions in a bubbling system
- Chinese Journal of Chemical Engineering Vol. 25, Issue 9, Pages: 1335-1342(2017)
- Affiliations：
  
  School of Chemistry and Chemical Engineering, Beijing Institute of Technology,Beijing,China,100081
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.12.004
  CLC：
- Published：2017
- Accepted：
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in relation to precipitation conditions in a bubbling system[J]. , 2017, 25(9): 1335-1342.
DOI：

in relation to precipitation conditions in a bubbling system[J]. , 2017, 25(9): 1335-1342. DOI： 10.1016/j.cjche.2016.12.004.

摘要

Abstract

Simulating the typical carbonation step in a mineral CO

sequestration

precipitated calcium carbonate (PCC) was prepared by bubbling CO

gas into a rich Ca solution. These carbonation reactions were conducted at three pH ranges

namely 10.0-9.0

9.0-8.0

and 8.0-7.0

in which temperature and CO

flow rate are additional experimental variables. The PCC obtained in experiments was examined by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). It was found that supersaturation determined by pH value and flow rate of CO

has significant influence on polymorph of PCC. Vaterite was preferably formed at high supersaturation

while dissolution of metastable vaterite and crystallization of calcite occurred at low supersaturation. High temperature is a critical factor for the formation of aragonite. At 70℃

vaterite

calcite and aragonite were observed to coexist in PCC because transformation from vaterite to aragonite

via

calcite occurred at this temperature. Scanning electron microscopy (SEM) technology was performed on prepared PCC

and various morphologies consistent with polymorphs were observed.

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Polymorph and morphology of CaCO3 in relation to precipitation conditions in a bubbling system

DOI：10.1016/j.cjche.2016.12.004

摘要

Abstract

关键词

Keywords

references

Polymorph and morphology of CaCO₃ in relation to precipitation conditions in a bubbling system