Browsing Institutt for prosess-, energi- og miljøteknologi by Subject "610"

Now showing items 21-34 of 34

    • Investigation of the shifting-parameter as a function of particle size distribution in a fluidized bed traversing from a fixed to fluidized bed 

      Rautenbach, Christo; Melaaen, Morten Christian; Halvorsen, Britt (Conference object; Peer reviewed, 2010)
      The particles in a biomass gasifier are mainly a mixture of wood chips, char particles and bed material. The charwood particles have a significant lower density than the bed material, and also a wider range of particle ...

    • Near Well Simulation of CO2 Injection for Enhanced Oil Recovery (EOR) 

      Chathurangani, L.B.J.; Halvorsen, Britt (Journal article; Peer reviewed, 2015-11-25)
      A major challenge in oil industry is the declining oil production and the relatively low recovery rate. Estimates show that although the oil is localized and mobile, more than half of the oil is remaining in the reservoir ...

    • NEQ rate based modeling of an absorption column for post combustion CO2 capturing 

      Jayarathna, Sanoja A.; Lie, Bernt; Melaaen, Morten Christian (Journal article; Peer reviewed, 2011-04-01)
      Post combustion CO2 capture via absorption into aqueous alkanolamine systems is considered to be the most mature and potential technique for CO2 removal from the power plants' exhaust gases. Modeling and simulation of such ...

    • Optimized carbon dioxide removal model for gas fired power plant 

      Arachchige, Udara Sampath P.; Mohsin, Muhammad; Melaaen, Morten Christian (Journal article; Peer reviewed, 2012)
      The carbon capture process model was developed for 500MW gas-fired power plant flue gas treating. Three different efficiencies, 85%, 90%, and 95%, were used to implement the model in Aspen Plus. The electrolyte NRTL rate ...

    • Oxygen effects in anaerobic digestion - a review 

      Botheju, Deshai; Bakke, Rune (Journal article; Peer reviewed, 2011)
      This article reviews the experimental and theoretical studies conducted on the possible effects of oxygen in biogas generating anaerobic digesters. The interactions of oxygen with various biochemical processes associated ...

    • Oxygen Effects in Anaerobic Digestion II 

      Botheju, Deshai; Lie, Bernt; Bakke, Rune (Journal article, 2010)
      Standard models describing bio-gasification using anaerobic digestion do not include necessary processes to describe digester dynamics under the conditions of oxygen presence. Limited oxygenation in anaerobic digestion can ...

    • Selection of packing materials for gas absorption 

      Arachchige, Udara Sampath P.; Melaaen, Morten Christian (Journal article; Peer reviewed, 2012)
      Carbon dioxide (CO2) capture is the most viable option to minimize the environmental impact by CO2 emissions. Amine scrubbing process is the well-known technology to achieve that. There are several packing types available ...

    • Simulation of CO2-Distribution in Fractured Oil Reservoir 

      Furuvik, Nora Cecilie Ivarsdatter; Halvorsen, Britt (Conference object; Peer reviewed, 2015-11-25)
      Deep geologic injections and storage of Carbon dioxide (CO2) for enhanced oil recovery (EOR) are an upcoming combination due to the potential for increased oil production from depleted oilfields at the same time reducing ...

    • Simulation of Gasification of Livestock Manure with Aspen Plus 

      Haugen, Hildegunn H.; Halvorsen, Britt; Eikeland, Marianne Sørflaten (Conference object; Peer reviewed, 2015-11-25)
      Gasification is a flexible technology where all types of organic waste including biomass from manure can be used as feed to the reactor. The recovery of energy from solid waste offers several benefits including substantial ...

    • Simulation of improved absorption configurations for CO2 capture 

      Øi, Lars Erik; Aromada, Solomon Aforkoghene (Conference object; Peer reviewed, 2015-11-25)
      The most well-known technology for post combustion CO2 capture from exhaust gas is absorption in an amine-based solvent followed by desorption. The drawback of this method is the high heat consumption required for desorption. ...

    • Statistical diagnosis of a gas-solid fluidized bed using Electrical Capacitance Tomography 

      Rautenbach, Christo; Melaaen, Morten Christian; Halvorsen, Britt (Journal article; Peer reviewed, 2012)
      Fluidization experiments were performed using several particle size distributions of spherical glass particles, ranging from Geldart B to D. An Electrical Capacitance Tomography (ECT) tomograph was utilised in the present ...

    • Temperature Effects in Anaerobic Digestion Modeling 

      Bergland, Wenche Hennie; Dinamarca, Carlos; Bakke, Rune (Conference object; Peer reviewed, 2015-11-25)
      Temperature effects on kinetic coefficients for the biochemical processes particle disintegration, hydrolysis and substrate uptake reactions were included in the anaerobic digestion model 1 (ADM1). It was evaluated on data ...

    • 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 ...

    • The influence of the experimental span of Time-resolved X-ray tomography on dynamic parameters in a fluidized bed 

      Rautenbach, Christo; Melaaen, Morten Christian; Halvorsen, Britt; Mudde, Robert F. (Journal article; Peer reviewed, 2011)
      Fluidized beds have presented some problems to experimentalists in the past due to their opaque nature [1]. This problem has however been overcome by non-intrusive nor invasive measurement techniques. X-rays or Gamma rays ...