Sammanfattning

The present study investigates how three different silicate-based bed materials behave in bubbling fluidized bed combustion of a model agricultural residue with respect to ash composition, namely barley straw. Quartz, natural K-feldspar, and olivine were all used in combustion at 700 C-degrees, and the resulting layer formation and bed agglomeration characteristics were determined. Based on this, a general reaction model for bed ash from agricultural residues was proposed, taking into account the reactivity of the different silicates investigated towards the main ash-forming elements K, Ca, and Si. The proposed reaction model links bed material interaction with Krich bed ash to the degree of polymerization of the silicate bed material, where addition reactions occur in systems with high polymerization, predominately in quartz, and substitution reactions dominate for depolymerized silicates such as K-feldspar and olivine.

Nyckelord

Agricultural residue; Agglomeration; Bed particle; Layer formation; Bioenergy

Publicerad i

Fuel
2024, Volym: 364, artikelnummer: 130788
Utgivare: ELSEVIER SCI LTD

SLU författare

• Bozaghian, Marjan

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    
  • Umeå Universitet

• Larsson, Sylvia

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Förnyelsebar bioenergi


Publikationens identifierare

DOI: https://doi.org/10.1016/j.fuel.2023.130788

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/128892