• Density, viscosity and free energy of activation for viscous flow of monoethanol amine (1) + H2O (2) + CO2 (3) mixtures. 

      Karunarathne, Sumudu S.; Eimer, Dag-Arne; Øi, Lars Erik (Peer reviewed; Journal article, 2020)
      Densities and viscosities of aqueous monoethanol amine (MEA) and CO2-loaded aqueous MEA are highly relevant in engineering calculations to perform process design and simulations. Density and viscosity of the aqueous MEA ...
    • Density, Viscosity, and Excess Properties of MDEA + H2O, DMEA + H2O, and DEEA + H2O Mixtures 

      Karunarathne, Sumudu S.; Eimer, Dag-Arne; Øi, Lars Erik (Peer reviewed; Journal article, 2020)
      This study presents measured density and viscosity of N-methyldiethanolamine (MDEA) + H2O, Dimethylethanolamine (DMEA) + H2O, and Diethylethanolamine (DEEA) + H2O mixtures. The density was measured at amine mass fraction ...
    • Design of a Medium-Scale Circulating Fluidized Bed Reactor for Chlorination of Processed Aluminum Oxide 

      Barahmand, Zahir; Aghaabbasi, Omid; Salcido, Jose Luis; Rustad, Emmy Kristine; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)
      Fluidization is a well-established and widely used technology in the process industry. The production stability and the large effective contact area between the active substances, resulting in high mass and heat transfer ...
    • Detailed One-Dimensional Model for Steam-Biomass Gasification in a Bubbling Fluidized Bed 

      Agu, Cornelius Emeka; Pfeifer, Christoph; Eikeland, Marianne Sørflaten; Tokheim, Lars-André; Moldestad, Britt Margrethe Emilie (Peer reviewed; Journal article, 2019)
      A one-dimensional unsteady state model is developed for simulation of biomass gasification in a bubbling fluidized bed. The proposed model accounts for the effect of hydrodynamic behavior of the fluidized bed by incorporating ...
    • Detection of Candidatus Neoehrlichia mikurensis in Norway up to the northern limit of Ixodes ricinus distribution using a novel real time PCR test targeting the groEL gene 

      Jenkins, Andrew; Raasok, Cecilie; Pedersen, Benedikte Nevjen; Jensen, Kristine; Andreassen, Åshild Kristine; Soleng, Arnulf; Edgar, Kristin Skarsfjord; Lindstedt, Heidi Elisabeth H.; Kjelland, Vivian; Stuen, Snorre; Hvidsten, Dag; Kristiansen, Bjørn Erik (Journal article; Peer reviewed, 2019)
      Background Candidatus Neoehrlichia mikurensis is an emerging tick-borne pathogen. It is widely distributed in Ixodes ricinus ticks in Europe, but knowledge of its distribution in Norway, where I. ricinus reaches its ...
    • Determination of biomass fraction for partly renewable solid fuels. 

      Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian; Tokheim, Lars-André (Journal article; Peer reviewed, 2014-04-29)
      Biomass-based waste fuels are used in many industrial applications since combustion of biomass gives no net emissions of carbon dioxide. Some waste fuels, e.g. RDF (refuse derived fuels), contain not only biomass, but also ...
    • Determination of fossil fraction of refuse derived fuel by the selective dissolution method in calorific value basis: Development of simplified method. 

      Ariyaratne, W. K. Hiromi; Asgautsen, Øyvind; Melaaen, Morten Christian; Eine, Kristin; Tokheim, Lars-André (Journal article; Peer reviewed, 2012)
      Determination of net CO2 emissions from combustion of Refuse Derived Fuel (RDF) is not straight forward due to the heterogeneous nature of the fuel. The fossil fraction of the fuel is an essential parameter for the ...
    • Determination of onset of bubbling and slugging in a fluidized bed using a dual-plane electric capacitance tomography system 

      Agu, Cornelius Emeka; Tokheim, Lars-André; Eikeland, Marianne Sørflaten; Halvorsen, Britt (Journal article; Peer reviewed, 2017)
      For a successful application of fluidized beds in chemical reactions and solids circulation, the boundary of regime of operation such as bubbling and slugging regimes, needs to be clearly defined. This study provides a ...
    • Detonation propagation in stratified reactant layers 

      Gaathaug, André Vagner; Bjerketvedt, Dag; Lundberg, Joachim; Vågsæther, Knut (Journal article; Peer reviewed, 2017)
      A numerical investigation of detonation propagation in stratified reactant layers is presented in this paper. It is baesed on the reactive Euler equations using a two step chemical kinetics approach. The numerical simulations ...
    • Detoxifying CO2 Capture Reclaimer Waste by Anaerobic Digestion 

      Wang, Shuai; Hovland, Jon; Brooks, Steven (Journal article; Peer reviewed, 2013-10-13)
      The decrease in toxicity of carbon capture reclaimer monoethanolamine (MEA) waste (MEAw) during anaerobic degradation of such waste together with easily degradable organics was investigated. Samples were collected from a ...
    • Development of normal pressure and frictional traction along the walls of a steep conical hopper during filling 

      Ding, Songxiong; Rotter, J.M.; Ooi, J.Y.; Enstad, Gisle (Journal article; Peer reviewed, 2011)
      A novel progressive filling approach was adopted in a numerical effort to represent the pilling process of particulate solids. It was implemented in a finite element analysis to investigate the development of loads along ...
    • Diffusion of CO2 through polymer membranes 

      Olsen, Chatrine Høgseth; Augestad, Morten; Helland, Irene; Moldestad, Britt Margrethe Emilie; Eikeland, Marianne Sørflaten (Chapter; Peer reviewed, 2020)
      The food industry uses polymers as packaging to protect and maintain high quality and freshness of the product during distribution and storage. Polymers are permeable by gases like O2, CO2 and water vapour. In this paper, ...
    • Distribution Of Co2 In Fractured Carbonate Reservoirs 

      Furuvik, Nora Cecilie Ivarsdatter; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2017)
      Deep geologic injection of supercritical carbon dioxide (CO 2 ) for enhanced oil recovery (EOR) has been widely used for improved oil recovery from depleted oilfields since early 1970s. The CO 2 injec - tion maintains the ...
    • Distribution of Solids in a Fluidized Bed Operated without a Gas Distributor 

      Agu, Cornelius Emeka; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      Despite several advantages of a gas distributor, there are also some challenges in its application. Using a gas distributor increases the fluidizing gas compression cost. Due to deposition of fine particles and product of ...
    • Doctorateness across Higher Education Institutions in Norway 

      Burner, Tony; Bjerkholt, Eva; Gaathaug, André Vagner; Kleiven, Synne; Ljoså, Tone Marte (Journal article; Peer reviewed, 2020)
      This article investigates doctorateness in Norway by evaluating the juridical regulations for doctoral studies at all PhD-awarding universities and university colleges according to the following categories: admission, ...
    • Durability of selected membrane materials when exposed to chlorine gas 

      Eikeland, Marianne Sørflaten (Doctoral thesis; Peer reviewed, 2001)
      This thesis is focusing on the durability of selected membrane materials when exposed to chlorine gas in the temperature range 30-100°C. Studies of the changes of membrane separation properties and the mechanisms promoting ...
    • 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 Effect of Climate and Orientation on the Energy Performance of a Prefab House in Norway 

      Ghazi, Amirhossein; Barahmand, Zahir; Øi, Lars Erik (Chapter, 2023)
      Norway has a wide range of climatic conditions throughout the country. The climate varies from coastal to inland areas. Geographic latitude and longitude, as well as the gulf stream oceanic flow, account for this phenomenon. ...
    • Effect of Elevated Hydrogen Partial Pressure on Mixed Culture Homoacetogenesis 

      Sivalingam, Vasan; Haugen, Tone; Wentzel, Alexander; Dinamarca, Carlos (Peer reviewed; Journal article, 2021)
      This study aimed to systematically investigate the effect of elevated hydrogen partial pressure on mixed culture homoacetogenesis in the range of 1–25 bar. Seven batch experiments were performed at different initial headspace ...
    • The Effect of Impurities on γ-Alumina Chlorination in a Fluidized Bed Reactor: A CPFD Study 

      Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)
      Alumina is one of the most widely used materials today, with a total annual production of millions of tonnes of highly pure alumina. A large portion of this is used to make metal aluminum. Apart from that, a growing amount ...