Blar i 1 USN ansatte på emneord "Emissions"

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    • Assessment of mercury emission at Norcem's cement kiln by use of 203 Hg tracer 

      Eriksen, Dag Øistein; Tokheim, Lars-André; Eriksen, T.A.; Meyer, Julien; Qvenild, Carsten (Conference report, 2005)
      In manufacture of cement clinker, mercury (Hg) is introduced in the cement kiln system via the fuels and as constituents in the raw materials, i.e. limestone, iron ore, etc. The permissible emission of Hg to air is very ...

    • Assessment of sulphur emission at Norcem's cement kiln by use of 35S-tracer 

      Eriksen, Dag Øistein; Tokheim, Lars-André; Eriksen, T.A.; Martini, V.; Qvenild, Carsten (Conference report, 2001)
      Although sulphur is not a major reacting species in making cement clinker, it is introduced as a pollutant in both the energy carrier (oil, coke, coal, household waste) and in the reactants (chalk, silica). Due to the ...

    • Carbon dioxide emission reduction by increased utilization of waste-derived fuels in the cement industry 

      Tokheim, Lars-André; Brevik, Per (Conference report, 2007)
      Considerable reductions in Norway's emissions of greenhouse gases like CO2 are required to meet the commitments of the Kyoto Protocol. CO2 emissions from cement clinker production originate from decarbonation of limestone ...

    • Effect of alternative fuel properties on NOx reduction 

      Axelsen, Ernst Petter; Tokheim, Lars-André; Bjerketvedt, Dag (Conference report, 2002)
      Today we see a substantial increase in the use of alternative fuels in the cement industry. The prospect of reduction in fuel costs and the environmental benefits of waste to energy conversion are the driving forces. For ...

    • The impact of staged combustion on the operation of a precalciner cement kiln 

      Tokheim, Lars-André (Doctoral theses at NTNU;1999:89, Doctoral thesis; Peer reviewed, 1999)
      In this thesis, the impact of staged combustion on the operation of a precalciner cement kiln, is considered. Mathematical modelling and full-scale experiments at the Norcem cement works in Brevik, Norway, is the basis for ...