• An Approach to Update the Failure Rates of Safety Barriers Based on Operating Experience 

      Lee, Shenae; Khakzad, Nima; Schmitz, Peter; Reniers, Genserik; Håbrekke, Solfrid; Paltrinieri, Nicola (Peer reviewed; Journal article, 2022)
      Hazardous events in process plants like the leakage of dangerous substances can result in severe damage, and such an event is often defined as the TOP event of a fault tree analysis (FTA) in a quantitative risk analysis. ...
    • Characterization of liquid products from slow pyrolysis of woody biomass 

      Wang, Liang; Czégény, Zsuzsanna; Tschentscher, Roman; Skreiberg, Øyvind (Peer reviewed; Journal article, 2022)
      In the present work, birch and spruce woodchips were pyrolyzed in a fixed bed reactor under different pyrolysis conditions. The effects of pyrolysis temperature and atmosphere (i.e., with and without gas purging) on yield ...
    • Digital Twin Concept for Risk Analysis of Oil Storage Tanks in Operations: a Systems Engineering Approach 

      Lee, Shenae; Haskins, Cecilia; Paltrinieri, Nicola (Peer reviewed; Journal article, 2022)
      This paper presents an approach to develop a risk monitoring tool for oil storage facilities. The suggested approach is derived from the existing dynamic risk analysis (DRA) methods and the digital twin concepts. One of ...
    • Dividing wall columns for natural gas liquefaction plants 

      Halvorsen, Ivar Johan; Dejanovic, Igor; Olujic, Zarko; Skogestad, Sigurd (Journal article; Peer reviewed, 2018)
      In order to meet current carbon dioxide emissions reduction challenges, natural gas processing and refining industries have to find the ways to minimize energy requirements of distillation operations. Building on foundations ...
    • Effect of calcination temperature and time on properties of steam exploded pellets 

      Wang, Liang; Baldauf, Lukas; Skreiberg, Øyvind; Jahrsengene, Gøril; Rørvik, Stein (Peer reviewed; Journal article, 2022)
      Carbon anodes play an essential role in the production of primary aluminium. Currently fossil carbon is used for producing carbon anodes. Reducing the carbon utilization and replacing the fossil carbon are the main routes ...
    • The Effect of Feeding Strategy on Butanol Production by Clostridium beijerinckii NCIMB 8052 Using Glucose and Xylose 

      Birgen, Cansu; Markussen, Sidsel; Wentzel, Alexander; Preisig, Heinz A. (Peer reviewed; Journal article, 2018)
      We performed fed-batch fermentations of glucose and xylose mixtures producing butanol. Our aim was to develop a feeding strategy for coping with carbon catabolite repression (CCR) and sequential utilization problems as ...
    • Evaluation of Electrosorption Process for Phosphate and Nitrate Removal from Wastewater 

      Krishnamurthy, Shreenath; Jayasayee, Kaushik; Enebakk Eide, Tom-Andre; McCay, Katie; Tschentscher, Roman; Stensrød, Ruth Elisabeth; Sunding, Martin Fleissner (Peer reviewed; Journal article, 2022)
      The present work is dedicated to the preparation and characterization of carbon-based electrodes for the removal of phosphates and nitrate ions from wastewater by CDI method. Carbons obtained from the pyrolysis were used ...
    • Investigation of the properties and reactivity of biocarbons at high temperature in mixture of CO/CO2 

      Wang, Liang; Skreiberg, Øyvind; Smith, Nicholas Albert; Jayakumari, Sethulakshmy; Jahrsengene, Gøril; Rørvik, Stein; Turn, Scott (Peer reviewed; Journal article, 2022)
      The CO2 gasification reactivity of biocarbons produced from birch wood chips under different atmospheric and pressurised conditions was investigated in this work. The reactivity tests were conducted by using a Macro-TGA ...
    • Modeling the Growth of Clostridium beijerinckii NCIMB 8052 on Lignocellulosic Sugars 

      Birgen, Cansu; Markussen, Sidsel; Wentzel, Alexander; Preisig, Heinz A.; Wittgens, Bernd (Peer reviewed; Journal article, 2018)
      To our knowledge, this is the first growth model of Clostridium beijerinckii NCIMB 8052 on glucose and xylose as representative lignocellulosic sugars, which considers the synergistic effects of sugars on the growth rate. ...
    • Multi-Product Dividing Wall Columns: A Simple and Effective Assessment and Conceptual Design Procedure 

      Halvorsen, Ivar Johan; Skogestad, Sigurd; Dejanovic, Igor; Matijasevic, Ljubica; Olujic, Zarko (Journal article; Peer reviewed, 2011)
      The objective of this paper is to further exploit and demonstrate the potential benefits of a V-min diagram based analysis, using a fifteen component feed mixture as base case. Detailed explanations are given on how to ...
    • On controllability of four-product dividing wall columns 

      Lukac, Goran; Halvorsen, Ivar Johan; Olujic, Zarko; Dejanovic, Igor (Journal article; Peer reviewed, 2018)
      Although potential for reduction of energy requirement and related carbon dioxide emissions is highly attractive – around 50% compared to conventional three column sequences – process industries are still reluctant to ...
    • Response Surface Methodology for Understanding Glucose and Xylose Utilization by Clostridium beijerinckii NCIMB 8052 

      Birgen, Cansu; Markussen, Sidsel; Wentzel, Alexander; Preisig, Heinz A. (Peer reviewed; Journal article, 2018)
      We applied response surface methodology to understand the effect and extend of carbon catabolite repression (CCR) on growth of Clostridium beijerinckii NCIMB 8052 using xylose and glucose as representative lignocellulosic ...
    • A Risk Aspect of Periodic Testing on Pressure Relief Valves 

      Lee, Shenae; Barros, Anne; Lundteigen, Mary Ann; Paltrinieri, Nicola (Peer reviewed; Journal article, 2022)
      A pressure relief valve (PSV) is a key safety barrier to prevent the catastrophic rupture of pressure equipment in a process plant. The safety function of a PSV is to open and relieve the pressure when the equipment pressure ...