Jump to main content
Jump to site search


Crystallization kinetics of Na2CO3 in Bayer aluminate solutions during the evaporation process

Author affiliations

Abstract

The inevitable Na2CO3 in caustic aluminate solution is the major component of scale formed in the evaporation process. A deeper understanding of the Na2CO3 crystallization kinetics in Bayer aluminate solutions during the evaporation process is necessary to further understand the scaling process. The kinetics of Na2CO3 crystallization in sodium aluminate solutions during the evaporation process were investigated in a continuously operated mixed suspension mixed product removal (MSMPR) crystallizer. Based on the particle size distribution (PSD) of crystals in the MSMPR crystallizer, a typical population density distribution curve of Na2CO3 crystals was obtained. Furthermore, an agglomeration population balance model was used to calculate the kinetic parameters through the population density distribution. When the initial content of Na2CO3 (Nc) is in the range of 17.54–26.32 g L−1, the agglomeration kernel has a good linear relationship with the initial Nc, while the volume growth rate and the nucleation rate have an obvious quadratic polynomial relationship with the initial Nc. All the regressions of the parameters had an adjusted R squared higher than 0.9945.

Graphical abstract: Crystallization kinetics of Na2CO3 in Bayer aluminate solutions during the evaporation process

Back to tab navigation

Publication details

The article was received on 08 Mar 2018, accepted on 23 May 2018 and first published on 24 May 2018


Article type: Paper
DOI: 10.1039/C8CE00363G
Citation: CrystEngComm, 2018, Advance Article
  •   Request permissions

    Crystallization kinetics of Na2CO3 in Bayer aluminate solutions during the evaporation process

    T. Guo, S. You, B. Yang, S. Cao and Y. Zhang, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE00363G

Search articles by author

Spotlight

Advertisements