High-yield hydrogen production by supercritical water gasification of various feedstocks: Alcohols, glucose, glycerol and long-chain alkanes

作者: Ratna F. Susanti , Laras W. Dianningrum , Taewoo Yum , Yunje Kim , Youn-Woo Lee

DOI: 10.1016/J.CHERD.2014.01.003

关键词: Diesel fuelGasolineMethanolHydrogen productionBiodieselSupercritical fluidHydrocarbonChemistryOrganic chemistryRaw material

摘要: Abstract Continuous supercritical water gasification (SCWG) of various feedstocks C1–C16 was conducted to produce hydrogen-rich gas. These represent model compounds biomass such as methanol/ethanol (alcohol-type), glucose and glycerol (byproducts biodiesel synthesis), petroleum fuels iso-octane/n-octane (gasoline), n-decane/n-dodecane (jet fuels) n-hexadecane (diesel). Almost complete all the achieved at 25 MPa, 740 °C 10 wt% with low total organic carbon values their liquid effluents. The hydrogen gas yields each feedstock were very similar theoretical equilibrium estimated by Gibbs free energy minimization. SCWG different temperatures (650 740 °C) concentrations (10 20 wt%) revealed that methanol ethanol (alcohols), simple oxygenated hydrocarbons, easier be gasified, producing negligible amounts products, when compared long-chain hydrocarbons (iso-octane n-decane) under identical conditions. When concentration increased from 10 20 wt%, ratio iso-octane decreased 1.02 0.79 while n-decane 1.12 1.50, implying a branched hydrocarbon may more resistant in water.

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