Počet záznamů: 1  

Transient Catalytic Activity of Calcined Dolomitic Limestone in a Fluidized Bed during Gasification of Woody Biomass.

  1. 1.
    SYSNO ASEP0460413
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevTransient Catalytic Activity of Calcined Dolomitic Limestone in a Fluidized Bed during Gasification of Woody Biomass.
    Tvůrce(i) Pohořelý, Michael (UCHP-M) RID
    Jeremiáš, Michal (UCHP-M) RID
    Skoblia, S. (CZ)
    Beňo, Z. (CZ)
    Šyc, Michal (UCHP-M) RID
    Svoboda, Karel (UCHP-M) RID
    Zdroj.dok.Energy and Fuels - ISSN 0887-0624
    Roč. 30, č. 5 (2016), s. 4065-4071
    Poč.str.7 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovafluidized- bed gasification ; woody biomass ; limestone
    Vědní obor RIVCI - Průmyslová chemie a chemické inženýrství
    CEPGC14-09692J GA ČR - Grantová agentura ČR
    Institucionální podporaUCHP-M - RVO:67985858
    UT WOS000376417600056
    EID SCOPUS84970948034
    AnotaceCalcined dolomitic limestone mixed with silica sand in a fluidized bed can catalytically enhance the gasification of woody biomass. The lime is prone to attrition and carry over from the reactor and to deactivation caused by pore sintering; therefore, it has to be replenished continuously or periodically to maintain catalytic activity of the fluidized bed. The main aim of this paper was to explore the level of the decrease of the catalytic activity of the fluidized bed if the limestone is not replenished and to estimate a critical period for its top-up. Wood chips were gasified first in a silica sand fluidized bed (1080 g), to obtain background data without the catalytic effect of limestone. After 5 h of operation, dolomitic limestone (1050 g) was added to the fluidized bed and left to calcine. Its catalytic activity was monitored during the following 6 h. During the second part of the experiment, the yield of the main gases (H2, CO, CH4, CO2, and H2O) remained almost unchanged. The yield of minor organic gases and tars rose slightly but still remained far below the value attained with only silica sand. The heavy polyaromatic tar compounds were effectively decomposed during the first 3 h after the addition of dolomitic limestone. It was concluded that the catalytic activity of dolomitic lime remains in an acceptable level during the first 3 h after its addition into the fluidized bed, suggesting that periodic rather than continuous replenishment of limestone should be sufficient.
    PracovištěÚstav chemických procesů
    KontaktEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Rok sběru2017