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    Evaluation of Anaerobically Digested Biomass in Catalytic Supercritical Water Gasification For Biofuel Production
    (2018) Madenoğlu, Tülay Güngören; Madenoğlu, Tülay Güngören
    Digested water hyacinth with waste sludge as inoculum were obtained after anaerobic digestion at 35 and 45°C. High organic content of digested biomass were evaluated through gasification at supercritical conditions of water in the absence and presence of catalysts (KOH, NaOH, LiOH and K2CO3) with 10 wt.% of volatile solid in feed. Supercritical water gasification of digested biomass was performed in batch reactor system at temperature and pressure ranges of 500–600°C and 35–45 MPa, respectively. the highest carbon gasification efficiency, hydrogen and methane yields were reached at 600°C (with samples digested at 45°C) in the absence of catalyst as 84.6 (g C in gaseous/g C in digestate), 53.0 (mol $H2%$) and 14.2 (mol $CH4%$), respectively. High organic content of digested biomass was converted by supercritical water gasification to methane and hydrogen rich gas, and aqueous products (aliphatic hydrocarbons, phenol, substituted phenols, N-heterocyclic, substituted N-heterocyclics, and substituted benzene) that can be evaluated as platform chemicals.
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