Recent Submissions

  • Dynamics and model analysis of hydropower systems 

    Vytvytskyi, Liubomyr (Doctoral thesis, 2019-09-06)
    Globalization and growth in energy consumption in combination with climate challenges, make the use of sustainable energy production a necessity. Important sustainable energy sources (solar, wind) are intermittent in ...
  • Biological hydrogen sulfide removal with nitrate 

    Sposob, Michal (Doctoral thesis, 2018-09-28)
    Aim: Hydrogen sulfide is a major occupational hazard in agriculture, industry, and sewage processing; its presence leads to corrosion. Thus, hydrogen sulfide removal is obligatory. These investigations aim to evaluate the ...
  • Process analytical technology for real-time quantitative speciation of aqueous phase CO2 capture solvents 

    Jinadasa, M.H. Wathsala N. (Doctoral thesis, 2019-04-08)
    Dependency on fossil fuel energy systems is unavoidable until there is a complete shift to alternative energy systems which have no/less impact for global warming. Rapid deployment of carbon capture and sequestration (CCS) ...
  • Sensor Data Fusion based Modelling of Drilling Fluid Return Flow through Open Channels 

    Chhantyal, Khim (Doctoral thesis, 2018-09-20)
    In drilling oil & gas wells, pressure control is essential for several reasons, but pri-marily for safety. The wellbore pressure should be maintained within the pressure window to avoid the kick and fluid loss while drilling. ...
  • Experimental and theoretical studies of rapid phase transitions in CO2 

    Hansen, Per Morten (Doctoral thesis, 2018-10-19)
    Rapid depressurization and evaporation of a pressurized liquefied gas are phenomena of relevance to hazard identification and risk analysis in the process industry. Tank explosions and pipeline ruptures are accident scenarios ...
  • Carbon Dioxide Capture by Chemical Absorption: Energy Optimization and Analysis of Dynamic Viscosity of Solvents 

    Arachchige, Udara S.P.R. (Doctoral dissertations at the University of South-Eastern Norway;26, Doctoral thesis, 2019-02-11)
    Global warming resulted from the emissions of greenhouse gases; especially carbon dioxide has received widespread attention. The concentration of CO2 in the atmosphere reaches 400 ppmv and that is a considerably high value ...
  • One-step Conversion of Ethylene to Propylene by a NiSO₄-ReO x/γ-A1₂O₃ Catalyst 

    Li, Lu (Doctoral dissertations at the University College of Southeast Norway;4, Doctoral thesis, 2016-06-22)
    The demand for propylene has dramatically increased due to the discovery of propylene’s derivatives (e.g. polypropylene). The propylene production from the conventional processes (steam cracking process and a refinery fluid ...
  • Modeling, Control and Optimization of a Hydropower Plant 

    Zhou, Wenjing (Doctoral dissertations at the University College of Southeast Norway;33, Doctoral thesis, 2017-12-19)
    Hydropower is a crucial power resource for everyday life in Norway, and a traditional industry that could be improved along with new updated technologies. The PhD work focuses on exploring new solutions, in aspect of ...
  • Low temperature methanol synthesis catalysed by a copper nanoparticle-alkoxide system 

    Ahoba-Sam, Christian (Doctoral dissertations at the University of South-Eastern Norway;6, Doctoral thesis, 2018-06-28)
    Methanol (MeOH) synthesis at low temperature in a liquid medium presents the possibility of achieving full syngas conversion per pass. The Low temperature MeOH synthesis (LTMS) process is advantageous over the current ...
  • Pneumatic conveying and storage of wet particles to illustrate offshore drill cutting handling 

    Malagalage, Anjana (Doctoral dissertations at the University of South-Eastern Norway;7, Doctoral thesis, 2018-06-29)
    In this thesis, the pneumatic conveying and storage characteristics of particles mixed with a drilling fluid are studied based on the pilot scale experiments. The objective of this research is to investigate the impact of ...
  • Hydrogen leaks in partially confined spaces - dispersion and explosions 

    Sommersel, Ole Kristian (Doctoral dissertations at the University of South-Eastern Norway;31, Doctoral thesis, 2017-12-12)
    In Porsgrunn, Norway, there was an explosion in an ammonia plant in July 1985. The accident was caused by a hydrogen leak inside a factory building, called N1. The result was a severe hydrogen-air explosion and jet fire, ...
  • Optimization of flow behavior in biomass gasification reactor 

    Thapa, Rajan Kumar (Doctoral dissertations at TUC;2015:2, Doctoral thesis, 2015)
    Dual fluidized bed reactor for steam gasification of biomass is a promising technology and can be used in Combined Heat and Power (CHP) production. The producer gas from the reactor can have a calorific value up to 14 ...
  • Image-based sizing techniques for fire water droplets 

    Lundberg, Joachim (Doctoral dissertations at TUC;2015:5, Doctoral thesis; Peer reviewed, 2015-11-12)
    The Norwegian petroleum industry has developed a standard for the technical safety of offshore installations (NORSOK S-001, 2008). When dimensioning accidental load with this standard, the deluge or fire water spray may ...
  • Tomographic Approach to Automatic and Non-Invasive Flow Regime Identification 

    Pradeep, Chaminda (Doctoral dissertations at TUC;2015:4, Doctoral thesis; Peer reviewed, 2015-08-28)
    This thesis mainly presents the use of process tomography to study and measure flow parameters in two phase horizontal and near horizontal flows. All static measurements were made using a horizontal separator section while ...
  • Post combustion CO2 capture using aqueous amine solvents: Investigations on molecular structure-activity relationships for amine solvents 

    Arachchige, Gumunu L. Samarakoon (Doctoral dissertations at TUC;2015:3, Doctoral thesis; Peer reviewed, 2015-06-25)
    The study in this dissertation focuses on chemical absorption of CO2 using aqueous amine which is expected to be the technology of choice for early large scale deployment of postcombustion carbon capture (PCC). However ...
  • Experimental Study of Deflagration to Detonation Transition in Hydrogen-Air Mixtures 

    Gaathaug, André Vagner (Doctoral dissertations at TUC;2015:1, Doctoral thesis; Peer reviewed, 2015-04-29)
    Gas explosions in a square channel have been investigated with a main focus on the deflagration to detonation transition (DDT). The gas mixtures were hydrogen and air at different concentrations. This work have been motivated ...
  • Anaerobic degradation of industrial carbon capture reclaimer MEA waste 

    Wang, Shuai (Doctoral dissertations at TUC;2014:5, Doctoral thesis; Peer reviewed, 2014-04-04)
    Global warming and its impacts are serious and challenging international problems (Vitousek, 1994). Increasing fossil fuel consumption results in rising atmospheric greenhouse gas levels which enhances global warming ...
  • Mass transfer characteristics of CO2 absorption into liquid droplets 

    Han, Jingyi (Doctoral dissertations at TUC;2014:1, Doctoral thesis; Peer reviewed, 2014-01-21)
    CO2 capture from exhaust gases has been paid more and more attention in order to avoid global warming. One of the methods for removing CO2 from the flue gas streams is the use of absorption and aqueous alkanolamine solutions ...
  • Production of polysilicon from silane pyrolysis in a fluidized bed 

    Filtvedt, Werner O. (Doctoral dissertations at TUC;2013:3, Doctoral thesis; Peer reviewed, 2013-06-07)
    The photovoltaic industry has experienced a tremendous growth over the last years. The backbone of the technology has so far been elemental silicon. Silicon is the second most abundant element on the earth, but in order ...
  • Degradation of Aqueous 2-Amino-2-methyl-1-propanol for Carbon Dioxide Capture 

    Wang, Tielin (Doctoral dissertations at TUC;2013:1, Doctoral thesis; Peer reviewed, 2013-01-29)
    Absorption-stripping with aqueous 2-amino-2-methyl-1-propanol (AMP), and especially AMP blends with other amines, such as monoethanolamine (MEA) and piperazine (PZ), presents an attractive option for carbon dioxide (CO2) ...

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