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Sökning: WFRF:(Tester P) > (2005-2009)

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  • Peterson, Andrew A., et al. (författare)
  • Thermochemical biofuel production in hydrothermal media: A review of sub- and supercritical water technologies
  • 2008
  • Ingår i: Energy and Environmental Sciences. - : Royal Society of Chemistry (RSC). - 1754-5692 .- 1754-5706. ; 1:1, s. 32-65
  • Tidskriftsartikel (refereegranskat)abstract
    • Hydrothermal technologies are broadly defined as chemical and physical transformations in high-temperature (200–600° C), high-pressure (5–40 MPa) liquid or supercritical water. This thermochemical means of reforming biomass may have energetic advantages, since, when water is heated at high pressures a phase change to steam is avoided which avoids large enthalpic energy penalties. Biological chemicals undergo a range of reactions, including dehydration and decarboxylation reactions, which are influenced by the emperature, pressure, concentration, and presence of homogeneous or heterogeneous catalysts. Several biomass hydrothermal conversion processes are in development or demonstration. Liquefaction processes are generally lower temperature (200–400° C) reactions which produce liquid products, often called ‘‘bio-oil’’ or ‘‘bio-crude’’.Gasification processes generally take place at higher temperatures (400–700° C) and can produce methane or hydrogen gases in high yields.
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