Browsing NTNU Open by Author "Høisæter, Karen Karolina"

Now showing items 1-10 of 10

    • Impact of Solvent on the Thermal Stability of Amines 

      Høisæter, Karen Karolina; Vevelstad, Solrun Johanne; Braakhuis, Lucas; Knuutila, Hanna K (Peer reviewed; Journal article, 2022)
      Water-lean solvents have been proposed as a possible alternative to aqueous amine systems in postcombustion carbon capture. There is however little data available on how amine degradation is affected by different solvents. ...

    • Modeling the Formation of Degradation Compounds during Thermal Degradation of MEA 

      Braakhuis, Lucas; Høisæter, Karen Karolina; Knuutila, Hanna K (Peer reviewed; Journal article, 2022)
      A kinetic model has been developed to predict thermal degradation of aqueous solutions of monoethanolamine (MEA) in carbon capture. The model focusses on both the degradation rate of the amine and the formation rates of ...

    • Oxidative degradation of triethylene glycol 

      Høisæter, Karen Karolina; Buvik, Vanja; Gonzalez, Susana Villa; Vevelstad, Solrun Johanne; Knuutila, Hanna Katariina (Peer reviewed; Journal article, 2024)
      Triethylene glycol (TEG) is unstable in the presence of oxygen and at high temperatures, though the degradation mechanisms occurring are not properly understood. In attempting to close some of the knowledge gaps, ...

    • Oxidative degradation of triethylene glycol 

      Høisæter, Karen Karolina; Buvik, Vanja; Gonzalez, Susana Villa; Vevelstad, Solrun Johanne; Knuutila, Hanna Katariina (Journal article; Peer reviewed, 2024)
      Triethylene glycol (TEG) is unstable in the presence of oxygen and at high temperatures, though the degradation mechanisms occurring are not properly understood. In attempting to close some of the knowledge gaps, ...

    • A review of degradation and emissions in post-combustion CO2 capture pilot plants 

      Buvik, Vanja; Høisæter, Karen Karolina; Vevelstad, Solrun Johanne; Knuutila, Hanna K (Peer reviewed; Journal article, 2021)
      Pilot plant testing of amine solvents for post-combustion CO2 capture is an essential tool for fully understanding degradation behaviour and emission profiles under realistic process conditions. This review aims to summarise ...

    • Signs of alkylcarbonate formation in water-lean solvents: VLE-based understanding of pKa and pKs effects 

      Ramos Wanderley, Ricardo; Høisæter, Karen Karolina; Knuutila, Hanna K (Peer reviewed; Journal article, 2021)
      Water-lean solvents are solvents for CO2 capture which contain at least one amine and one organic diluent. Carbamate-forming amines in nonaqueous water-lean solvents typically absorb CO2 through the formation of carbamate ...

    • Stability of dehydration glycols MEG and TEG 

      François, Maxime (Master thesis, 2020)
      The offshore process of natural gas dehydration is of crucial importance in meeting the required specifications and avoiding the formation of hydrates when transporting rich gas by pipeline. Monoethylene glycol or triethylene ...

    • Stability of Solvents for Gas Purification 

      Høisæter, Karen Karolina (Doctoral theses at NTNU;2023:293, Doctoral thesis, 2023)
      The main objective of this work was to increase the understanding of the chemical processes occurring as solvents used in gas purification degrade. Amine systems for CO2 capture and glycol systems for gas dehydration were ...

    • Synthesis of 1,2,3-Triazole Peptidomimetics for Antimicrobial Evaluation 

      Høisæter, Karen Karolina (Master thesis, 2018)
      The scope of this thesis has been to synthesise small cationic amphiphilic 1,2,3-triazoles with multiple lipophilic and cationic groups. These will be tested for antimicrobial activity. The target compound 7* and 8 were ...

    • Three-phase Hybrid Facilitated Transport Hollow Fiber Membranes for Enhanced CO2 Separation 

      Janakiram, Saravanan; Marin Espejo, Juan Luis; Høisæter, Karen Karolina; Lindbråthen, Arne; Ansaloni, Luca; Deng, Liyuan (Peer reviewed; Journal article, 2020)
      The configuration of thin film composite (TFC) in the form of hollow fiber is desired for gas separation membranes to achieve better gas permeation and higher packing density. In this work, we developed and tested TFC ...