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Supercritical Water and Supercritical Carbon Dioxide for Cleaning of Soil Material

  • G. Brunner
  • B. Misch
  • A. Firus
  • K. Nowak
Chapter

Abstract

Thermal treatment of contaminated soil has gained great interest. If biological methods have no sufficient cleaning effect, the soil material must be deposited or incinerated. Thermal treatment of contaminated soil with supercritical water (Tc = 374 °C, Pc = 22.1 MPa), in contrast to incineration, leads to clean soil material without creating nitrogen oxides and sulfur dioxide. Depending on the type of contamination, reaction products are CO2, H2O, inorganic acids and highly volatile hydrocarbons. The process is carried out at elevated pressures (25 MPa) and, compared to incineration, at moderate temperatures (375–600 °C). Residence times are short (< 120 s) and reaction products can be controlled by conditions of state relating to the oxidation (Brunner 1994).

Keywords

Supercritical Fluid Supercritical Carbon Dioxide Soil Material Physical Treatment Supercritical Water 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • G. Brunner
    • 1
  • B. Misch
    • 1
  • A. Firus
    • 2
  • K. Nowak
    • 3
  1. 1.Department of Thermal Process EngineeringTechnical University of Hamburg-HarburgHamburgGermany
  2. 2.ZT-TEBayer AGLeverkusenGermany
  3. 3.Bremer Sonderabfall Beratungsgesellschaft mbHBremenGermany

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