Investigation of control methods for agglomeration and slagging during combustion of olive cake in a bubbling fluidized bed combustor

Çelikler C., VAROL M.

Journal of Cleaner Production, cilt.320, 2021 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 320
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.jclepro.2021.128841
  • Dergi Adı: Journal of Cleaner Production
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Business Source Elite, Business Source Premier, CAB Abstracts, Communication Abstracts, INSPEC, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Agglomeration, Alternative bed material, Bubbling fluidized bed, Leaching, Olive cake, Slagging
  • Akdeniz Üniversitesi Adresli: Evet

Özet

© 2021 Elsevier LtdOlive cake is an agricultural residue with a high calorific value and high availability. It should be considered in energy production for use in waste management and the waste-to-energy approach. However, there are some ash-related problems encountered during olive cake combustion with a silica bed due to its high alkali content. In this study, two control methods (silica bed with olive cake leaching, and limestone-bed material) were investigated to prevent ash-related problems. The combustion tests were conducted in a bubbling fluidized bed. Bottom ashes and slags were analyzed to determine elemental composition and phase composition. Agglomeration was detected at 850 °C for olive cake combustion by itself. Removal of the alkalis in the olive cake by leaching prevented silicate formation and produced a noticeable decrease in the rate of silica bed agglomeration and slag formation during combustion of the leached olive cake. Using limestone as the bed material instead of silica sand was even more effective than leaching of olive cake in terms of preventing slagging. The use of limestone as fluidizing bed material causes Ca and Si to form compounds with the high melting point. The positive effect of these control methods on agglomeration and slag formation should make it possible to use olive cake in energy production without any operational problems.