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Träfflista för sökning "AMNE:(TEKNIK OCH TEKNOLOGIER Kemiteknik Kemiska processer) srt2:(1995-1999)"

Sökning: AMNE:(TEKNIK OCH TEKNOLOGIER Kemiteknik Kemiska processer) > (1995-1999)

  • Resultat 1-10 av 118
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1.
  • Wik, Torsten, 1968, et al. (författare)
  • Transfer functions for series of continuously stirred biofilm reactors
  • 1997
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • There is an increasing interest in modeling and applications of biofilm reactors. Commonly, biofilm reactors are modeled as a single continuously stirred biofilm reactor (CSBR), or as a series of such. The models can be used to extract information about the reactor, for design and to predict reactor effluent characteristics as a function of influent characteristics. A CSBR consists of a stirred tank, which the bulk water flows through, and from which substrates diffuse into a biofilm where they may be transformed into new substances by bacteria living in the biofilm. Here, standard assumptions are used to derive a general and flexible dynamic model of CSBR-systems, where the reaction kinetics are of zero or first order. An exact, and an approximate transfer function, which enables easy simulations, analysis, and implementation in real-time softwares, is derived. Particular focus is on pulse responses, which is an important experimental procedure in control and reactor design. Explicit equations for the pulse responses are presented, and parameter dependancy is discussed. Experimental data from a pilot plant nitrifying trickling filter are used to illustrate the use of transfer functions for identification of reactor and biofilm parameters.
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2.
  • Sandström, Olof, et al. (författare)
  • Miljöpåverkan av skogsindustriutsläpp
  • 1997
  • Ingår i: Naturvårdsverkets rapportserie. Rapport 4695. ; , s. 1-89
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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3.
  • Engström, Per, et al. (författare)
  • Sulphur dioxide interaction with NOx storage catalysts
  • 1999
  • Ingår i: Applied Catalysis B: Environmental. - 0926-3373 .- 1873-3883. ; 22:4, s. L241-L248
  • Tidskriftsartikel (refereegranskat)abstract
    • The effect of SO2 on the NOx storage capacity and oxidation and reduction activities of a model Pt/Rh/BaO/Al2O3 NOx storage catalyst was investigated. Addition of 2.5, 7.5 or 25 vol. ppm SO2 to a synthetic lean exhaust gas caused deactivation of the NOx storage function, the oxidation activity and the reduction activity of the catalyst. The degree of deactivation of the NOx storage capacity was found to be proportional to the total SO2 dose that the catalyst had been exposed to. SO2 was found to be accumulated in the catalyst as sulphate.
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5.
  • Kornmann, Xavier, et al. (författare)
  • Nanocomposites based on montmorillonite and unsaturated polyester
  • 1998
  • Ingår i: Polymer Engineering and Science. - : Wiley. - 0032-3888 .- 1548-2634. ; 38:8, s. 1351-1358
  • Tidskriftsartikel (refereegranskat)abstract
    • The concept of nanoscale reinforcement provides opportunity for synthesis of new polymer materials with unique properties. Montmorilonite (MMT) was derived from bentonite, purified, activated by sodium ions and mixed with reacting unsaturated polyester (UP). X-ray and transmission electron microscopy data were in support of the formation of a partially delaminated nanocomposite material. At an MMT content of only 1.5 vol%, the fracture energy, GQ of the nanocomposite was doubled, 138 J/m2 as compared with 70 J/m2 for the pure UP.
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