Thermodynamic Investigation of Selected Metal Sulfates for Controlling Fouling and Slagging During Combustion

Fiseha Tesfaye, Mykola Moroz, Daniel Lindberg, Leena Hupa, In-Ho Jung

Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review


Today, aside from the solar, wind and hydropower, solid biomass, municipal solid wastes and industrial wastes are increasingly becoming important sources of renewable energy. However, fouling, slagging and corrosion that are associated with the combustion processes of these renewable resources threaten long-term operation availability and costs of power plants. Alkali metal elements in the biomass fuel and the ash fusion behavior are the two major origins contributing to slagging during high-temperature biomass combustion. Slags accumulated on superheaters, which decrease thermal efficiency, often constitute complex combination of K-Ca-Mg-sulfates. However, thermodynamic properties of these sulfates and their combined effect with other phases, which will help to solve the fouling, slagging and high-temperature corrosion related problems in biomass combustion processes, are not well known. In this work, thermal stabilities including solubility limits of selected phases and phase mixtures in the MgSO4-K2SO4-CaSO4 system are both critically reviewed and experimentally studied. The obtained results are presented and discussed.

Original languageUndefined/Unknown
Title of host publication23rd International Conference on Fluidized Bed Conversion - Innovative Fluidized Bed Conversion Technology for a Sustainable Development
EditorsSang-Done Kim, Jong-Min Lee
PublisherThe Korean Institute of Chemical Engineers (KIChE)
ISBN (Print)978-89-950005-7-1
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Fluidized Bed Conversion (FBC) - 23rd International Conference on Fluidized Bed Conversion (FBC)
Duration: 13 May 201817 May 2018


ConferenceInternational Conference on Fluidized Bed Conversion (FBC)


  • Renewable energy
  • Sulfates
  • Thermal stability
  • slagging and fouling

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