Abstract

An experimental design in cyclone drying parameters for green liquor sludge led to an efficient drying of the material and an interpretation of optimal cyclone parameters. The obtained dried materials were analyzed by ICP-OES and NIR spectroscopy. The inorganic analysis showed that a partial separation of toxic chemicals is possible and the NIR results could be used as an extra way of interpreting the results of the experimental design. The conclusion is that besides drying, also a change in chemical composition occurs as an effect of cyclone treatment. The NIR method is fast and requires little sample preparation while the ICP-OES method gives more direct inorganic results but is more demanding in time for sample handling and measurement.

Keywords

Sludge; Green liquor; Multivariate interpretation; Cyclone drying; Experimental design; Separation of toxic metals

Published in

Chemical Engineering Journal
2016, Volume: 304, pages: 448-453

SLU Authors

• Mäkelä, Mikko

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    
  • Tokyo Institute of Technology

• Geladi, Paul

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Grimm, Alejandro

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Larsson, Sylvia

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Other Chemistry Topics


Publication identifier

DOI: https://doi.org/10.1016/j.cej.2016.06.107

Permanent link to this page (URI)

https://res.slu.se/id/publ/77610