• A comprehensive scaling up technique for pneumatic transport systems 

      Ratnayake, Chandana (Doctoral theses at NTNU;2005:169, Doctoral thesis; Peer reviewed, 2005)
      The main objective of this investigation was to formulate a comprehensive scaling up technique for designing of pneumatic conveying systems by addressing the whole pipeline together with all accessories. Five different ...
    • Adapting benchmarking to project management : an analysis of project management processes, metrics, and benchmarking process models 

      Emhjellen, Kjetil (Doctoral theses at NTNU;1997:93, Doctoral thesis; Peer reviewed, 1997)
      Since the first publication on benchmarking in 1989 by Robert C. Camp of “Benchmarking: The search for Industry Best Practices that Lead to Superior Performance”, the improvement technique benchmarking has been established ...
    • 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 ...
    • An experimental and computational study of flow behaviour in bubbling fluidized beds 

      Halvorsen, Britt (Doctoral theses at NTNU;2005:70, Doctoral thesis; Peer reviewed, 2005)
      Experimental and computational studies of bubble behaviour in gas/solid fluidized beds have been performed. Bubble behaviour depends on particle density, particle size and size distribution and emphasis is given to study ...
    • An Experimental and Theoretical Study of Dense Fluidized Bed Fluid Dynamics 

      Rautenbach, Christo (Doctoral dissertations at TUC;2012:3, Doctoral thesis; Peer reviewed, 2012-05-31)
      The papers presented in the present study aim to elucidate the complex fluid dynamic phenomena in a cold dense phase fluidized bed reactor. Theoretical and experimental studies were conducted with this aim and several ...
    • 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 ...
    • 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 ...
    • 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) ...
    • Degradation of polymeric and particulate organic carbon in biofilms 

      Kommedal, Roald (Doctoral theses at NTNU;2003:101, Doctoral thesis; Peer reviewed, 2003)
      Polymeric and particulate organic carbon (POM) are fundamental compounds in the global cycling of carbon, and constitute significant amounts of BOD in municipal wastewater. The main objective of this work is to study ...
    • 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 ...
    • Empirical modeling, state estimation, and process control with real-life applications to the Czochralski crystallization process 

      Komperød, Magnus ((Doctoral dissertations at TUC;2012:1, Doctoral thesis; Peer reviewed, 2012-05-24)
      This PhD thesis presents research work within the field of systems and control engineering, with emphasis on applications to real-life processes, the Czochralski (CZ) crystallization process in particular. During the PhD ...
    • 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 ...
    • 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 ...
    • Gas explosions in process pipes 

      Kristoffersen, Kjetil (Doctoral theses at NTNU;2004:79, Doctoral thesis; Peer reviewed, 2004)
      In this thesis, gas explosions inside pipes are considered. Laboratory experiments and numerical simulations are the basis of the thesis. The target of the work was to study gas explosions in pipes and to develop numer- ...
    • 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, ...
    • Identification of signals describing pairwise interaction in plankton, bacteria and bacteriophage : a study of model, microcosm and lake 

      Sandvik, Gunnar (Doctoral theses at NTNU;2003:54, Doctoral thesis; Peer reviewed, 2003)
      This study concerns interaction between organisms. Such interactions are often studied through organism abundances over periods of time (time-series). Time-series reflect both internal (biological) and external (environmental) ...
    • 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 ...
    • 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 ...
    • 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 ...
    • Mass Transfer Kinetics of Carbon Dioxide into Concentrated Aqueous Solutions of Monoethanolamine 

      Ying, Jiru (Doctoral dissertations at TUC;2013:2, Doctoral thesis; Peer reviewed, 2013-02-15)
      Global warming arguments have gained more and more attention due to the new regulations of carbon dioxide (CO2) emission in the world. Monoethanolamine (MEA) has been employed as an important industrial absorbent for CO2 ...