Blar i Institutt for prosess-, energi- og miljøteknologi på tittel

Viser treff 231-250 av 331

    • Open Active Contour Model For Front Tracking Of Detonation Waves 

      Maharjan, Samee; Lysaker, Ola Marius; Gaathaug, André Vagner (Journal article; Peer reviewed, 2017)
      This paper presents an image processing framework for tracking the front of the detonation wave from a sequence of images. The images are captured by high speed camera during a laboratory gas explosion experiment. By ...

    • Optimization of gas velocity and pressure drop in CO2 absorption column 

      Park, Kwangsu; Øi, Lars Erik (Journal article; Peer reviewed, 2017)
      For a traditional amine-based CO2 capture system, the absorber column accounts for a significant part of the overall capital- and operating cost. One important design factor of absorber columns is the gas velocity through ...

    • 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 ...

    • Optimum feeding rate of solid hazardous waste in a cement kiln burner 

      Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian; Tokheim, Lars-André (Journal article; Peer reviewed, 2013)
      Solid hazardous waste mixed with wood chips (SHW) is a partly CO2 neutral fuel, and hence is a good candidate for substituting fossil fuels like pulverized coal in rotary kiln burners used in cement kiln systems. SHW is ...

    • 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 ...

    • Particle image velocimetry measurements of stratified gas-liquid flow in horizontal and inclined pipes 

      Vestøl, Sondre; Kumara, W.A.S.; Melaaen, Morten Christian (Journal article; Peer reviewed, 2018)
      The main objectives of this work is to produce detailed velocity profile measurements over a range of operating conditions of two phase gas/liquid flow with low liquid fractions in horizontal and inclined pipes. The ...

    • Performance analysis of biocathode in bioelectrochemical CO2 reduction 

      Nelabhotla, Anirudh Bhanu Teja; Bakke, Rune; Saldias Dinamarca, Carlos Antonio (Peer reviewed; Journal article, 2019)
      Microbial electrosynthesis (MES) biogas upgrading is done via reduction of carbon dioxide to methane through electroactive microbial catalysis. The baseline MES mode of operation showed about a 39% increase in the methane ...

    • Performance of CO2 flooding in a heterogeneous oil reservoir using autonomous inflow control 

      Aakre, Haavard; Mathisen, Vidar; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      CO2-EOR is one of the main methods for enhanced oil recovery. The injection of CO2 does not only improve oil recovery, but also contributes to reduction of greenhouse gas emissions. However, many CO2-EOR project are reporting ...

    • Performance of MAPA promoted tertiary amine systems for CO2 absorption: Influence of alkyl chain length and hydroxyl groups 

      Bernhardsen, Ida Mortensen; Krokvik, Iris Renate Tøkje; Jens, Klaus-Joachim; Knuutila, Hanna K (Journal article; Peer reviewed, 2017)
      Absorption and desorption of CO2 into five aqueous tertiary amine solvents and their blends with MAPA were studied using a screening apparatus. Results showed that MAPA significantly enhanced both CO2 absorption rate and ...

    • Piping Components: An Analysis of the Critical Dimensions 

      Anderson, Gwen; Gjerde, Ida Helene; Helgesen, Sondre Luca; Jecmenica, Mladen; Thapa, Rajan Kumar (Peer reviewed; Journal article, 2020)
      Pipe components such as elbow, tees, and weldolets are produced at various places in the world. Although the component is produced in accordance with standard ASME (American Society of Mechanical Engineers) B16.9, measurements ...

    • Prediction of void fraction and minimum fluidization velocity of a binary mixture of particles: Bed material and fuel particles 

      Agu, Cornelius Emeka; Pfeifer, Christoph; Moldestad, Britt Margrethe Emilie (Peer reviewed; Journal article, 2019)
      For operational control and design of a fluidized bed reactor containing different types of solid particles, the bed void fraction and minimum fluidization velocity are vital parameters. This paper demonstrates a method ...

    • Pressure drop, flow pattern and local water volume fraction measurements of oil-water flow in pipes 

      Kumara, W.A.S.; Halvorsen, Britt; Melaaen, Morten Christian (Journal article; Peer reviewed, 2009-11)
      Oil-water flow in horizontal and slightly inclined pipes was investigated. The experimental activities were performed using the multiphase flow loop at Telemark University College, Porsgrunn, Norway. The two-fluid model ...

    • Proceedings of the Tenth International Seminar on Fire and Explosion Hazards, 22-27 May 2022, Oslo, Norway 

      Vågsæther, Knut; Lach, Agnieszka; Bradley, Derek; Lundberg, Joachim (Conference object; Peer reviewed, 2022)
      The Tenth International Seminar on Fire and Explosion Hazards (ISFEH10) organized in Oslo, Norway from 22 to 27 May 2022, is a place to share research on the physical effects of hazards, prediction methods for consequences, ...

    • Process Design of a Novel Low Temperature Methanol Synthesis Process Using an Air-blown Autothermal Reformer 

      Ahoba-Sam, Christian; Øi, Lars Erik; Jens, Klaus-Joachim (Journal article; Peer reviewed, 2018)
      Methanol (MeOH) synthesis at low temperature (100 oC) presents an opportunity for full syngas conversion per pass. This presents a cheaper alternative for MeOH synthesis using an air-blown autothermal reformer (ATR) rather ...

    • Process Integration of Green Hydrogen: Decarbonization of Chemical Industries 

      Ostadi, Mohammad; Paso, Kristofer Gunnar; Rodriguez-Fabia, Sandra; Øi, Lars Erik; Manenti, Flavio; Hillestad, Magne (Peer reviewed; Journal article, 2020)
      Integrated water electrolysis is a core principle of new process configurations for decarbonized heavy industries. Water electrolysis generates H2 and O2 and involves an exchange of thermal energy. In this manuscript, we ...

    • Process parameters affecting the sustainability of fermentative hydrogen production: A short review 

      Dinamarca, Carlos; Bakke, Rune (Journal article; Peer reviewed, 2011)
      Anaerobic fermentation is regarded as the least energy intensive method for H2 production. Extensive literature on experimental attempts to achieve the highest possible theoretical yield (e.g. 4 mol H2/mol glucose) is ...

    • Process Simulation of Calcium Looping With Indirect Calciner Heat Transfer 

      Jayarathna, Chameera K.; Mathisen, Anette; Øi, Lars Erik; Tokheim, Lars-André (Conference object; Peer reviewed, 2015-11-25)
      In calcium looping (CL), calcium oxide (CaO) is used as a sorbent for carbon dioxide (CO2). The CO2 reacts with CaO to produce calcium carbonate (CaCO3) in a carbonator operating at about 650 °C. The CaCO3 is then sent to ...

    • Pyrolysis of plastic waste to environmental friendly products 

      Pandey, Umesh; Stormyr, Jan Arild; Hassani, Alireza; Jaiswal, Rajan; Haugen, Hildegunn Hegna; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2020)
      Pyrolysis of plastics is one of the efficient ways to recover plastic waste. Pyrolysis refers to a thermal degradation of long-chain organic molecules into smaller hydrocarbons. Many ongoing research studies are trying to ...

    • Quantification of biofilm accumulation by an optical approach 

      Bakke, Rune; Kalvenes, Sigmund; Kommedal, Roald (Journal article; Peer reviewed, 2001-02)
      Methods for non-invasive, in situ, measurements of biofilm optical density and biofilm optical thickness were evaluated based on Pseudomonas aeruginosa experiments. Biofilm optical density, measured as intensity reduction ...