Susanti, Ratna F. Dianningrum, Laras W. Yum, Taewoo Kim, Yunje Lee, Youn-Woo Kim, Jaehoon 2024-01-20T08:34:55Z 2024-01-20T08:34:55Z 2021-09-02 2014-10 0263-8762 https://pubs.kist.re.kr/handle/201004/126291 Continuous supercritical water gasification (SCWG) of various feedstocks of C1-C16 was conducted to produce hydrogen-rich gas. These feedstocks represent model compounds of biomass such as methanol/ethanol (alcohol-type), glucose and glycerol (byproducts of biodiesel synthesis), and model compounds of petroleum fuels such as iso-octane/n-octane (gasoline), n-decane/n-dodecane (jet fuels) and n-hexadecane (diesel). Almost complete gasification of all the feedstocks was achieved at 25 MPa, 740 degrees C and 10 wt% with low total organic carbon values of their liquid effluents. The hydrogen gas yields of each feedstock were very similar to the theoretical equilibrium yields estimated by Gibbs free energy minimization. SCWG at different gasification temperatures (650 and 740 degrees C) and concentrations (10 and 20 wt%) revealed that methanol and ethanol (alcohols), the simple oxygenated hydrocarbons, were easier to be gasified, producing negligible amounts of liquid products, when compared with long-chain hydrocarbons (iso-octane and n-decane) under the identical conditions. When the feedstock concentration was increased from 10 to 20 wt%, the equilibrium hydrogen ratio from iso-octane gasification decreased from 1.02 to 0.79 while that of n-decane increased from 1.12 to 1.50, implying that a branched hydrocarbon may be more resistant to gasification in supercritical water. (c) Crown Copyright 2014 Published by Elsevier B.V. on behalf of The Institution of Chemical Engineers. All rights reserved. English ELSEVIER BIOMASS GASIFICATION MODEL COMPOUNDS HEATING RATE METHANOL OXIDATION CATALYST HYDROPYROLYSIS DECOMPOSITION ETHANOL ACID High-yield hydrogen production by supercritical water gasification of various feedstocks: Alcohols, glucose, glycerol and long-chain alkanes Article 10.1016/j.cherd.2014.01.003 1 CHEMICAL ENGINEERING RESEARCH & DESIGN, v.92, no.10, pp.1834 - 1844 CHEMICAL ENGINEERING RESEARCH & DESIGN 92 10 1834 1844 scie scopus 000344205400006 2-s2.0-84908590246 Engineering, Chemical Engineering Article BIOMASS GASIFICATION MODEL COMPOUNDS HEATING RATE METHANOL OXIDATION CATALYST HYDROPYROLYSIS DECOMPOSITION ETHANOL ACID Supercritical water gasification Hydrogen Equilibrium yield Hydrocarbon