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  • Title: Biomass gasification for hydrogen rich gas in a decoupled triple bed gasifier with olivine and NiO/olivine.
    Author: Tursun Y, Xu S, Abulikemu A, Dilinuer T.
    Journal: Bioresour Technol; 2019 Jan; 272():241-248. PubMed ID: 30347349.
    Abstract:
    Catalytic steam gasification of biomass has been carried out in decoupled triple bed gasification (DTBG) system which consists of pyrolyzer, reformer and combustor. Olivine and NiO/olivine used as in-situ tar destruction catalyst. The result shows the gasification system with catalytic bed materials allows an option to improve tar removal that enhances H2 production. A gas yield of 1.59 Nm3/kg daf with H2 concentration of 56.1 vol% and tar content as low as 0.6 g/Nm3 has been achieved with the presence of NiO/olivine. Olivine and NiO/olivine reduced tar yield by 55% and 94% respectively compared to quartz. Gas yield, tar removal efficiency and water conversion enhanced by higher reformer temperature. The longer residences time of catalyst in reformer leads in-situ reduction of olivine and NiO/olivine that adds up in-situ tar reforming. Particularly, in-situ reduction of NiO to metallic Ni enhances tar and CH4 reforming reaction.
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