Fouling tendency of ash resulting from burning mixtures of biofuels

M Theis, BJ Skrifvars, Mikko Hupa, H Tran

    Forskningsoutput: Kapitel i bok/konferenshandlingKonferensbidragVetenskapligPeer review

    1 Citeringar (Scopus)


    Specified mixts. of peat with bark and peat with straw were burned in a lab-​scale entrained flow reactor that simulates conditions in the superheater region of a biomass-​fired boiler.  Deposits were collected on an air-​cooled probe that was inserted into the reactor at the outlet.  For both mixts., the deposition behavior followed a non-​linear pattern, which suggests that physico-​chem. interaction between the ashes of the different fuels has taken place.  The results indicate that it is possible to burn up to 30 wt-​% bark (renewable biofuel and pulp mill waste) and up to 70 wt-​% straw (renewable biofuel and agricultural waste) in mixts. with peat without encountering increased deposition rates in the reactor.  The deposit compn. was compared to the fuel ash compn. using chem. fractionation anal. and SEM​/EDX.  While the compn. of deposits obtained from pure fuels resembles the feed compn., a considerable change is obsd. in deposits obtained from mixts.  K and S compds. are attached to Si spheres and the substrate surface.  The deposition rate is significantly lowered when removing K, S, Cl and Na in bark prior to burning by washing and mech.​/thermal dewatering.
    Titel på gästpublikationProceedings of the 18th International Conference on Fluidized Bed Combustion
    RedaktörerL Jia
    FörlagAmerican Society of Mechanical Engineers, ASME
    ISBN (tryckt)0-7918-4698-9
    StatusPublicerad - 2005
    MoE-publikationstypA4 Artikel i en konferenspublikation
    Evenemangconference; 2005-05-22; 2005-05-25 - Toronto, Canada
    Varaktighet: 22 maj 200525 maj 2005


    Konferensconference; 2005-05-22; 2005-05-25

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