Browsing NTNU Open by Author "Buvik, Vanja"

Now showing items 1-18 of 18

    • Addition of potassium iodide reduces oxidative degradation of monoethanolamine (MEA) 

      Buvik, Vanja; Ramos Wanderley, Ricardo; Knuutila, Hanna K (Peer reviewed; Journal article, 2021)
      We introduce the addition of stable salts to aqueous MEA as a way of inhibiting oxidative degradation reactions. We performed oxidative degradation studies in aqueous MEA containing sodium chloride (NaCl) and potassium ...

    • Degradation behaviour of fresh and pre-used ethanolamine 

      Buvik, Vanja; Vevelstad, Solrun Johanne; Moser, Peter; Wiechers, Georg; Wanderley, Ricardo R.; Monteiro, Juliana; Knuutila, Hanna K (Peer reviewed; Journal article, 2023)
      The oxidative degradation of previously used ethanolamine from three different CO2 capture pilot plants was studied in a laboratory-scale degradation setup. Different solvents behave differently under the same experimental ...

    • DT2_2017_1 Degradation and corrosion of amines (from a structural perspective) 

      Vevelstad, Solrun Johanne; Grimstvedt, Andreas Magnar; Buvik, Vanja (Research report, 2017)
      Degradation and corrosion of amine solutions in post combustion CO2 capture plants increases the cost of the process due to operational problems, the need for high quality material in the plant and reduction of the solvent's ...

    • Experimental Assessment of the Environmental Impact of Ethanolamine 

      Buvik, Vanja; Strimbeck, Richard; Knuutila, Hanna K (Chapter, 2021)
      The environmental impact of ethanolamine, a common amine for carbon dioxide capture, was experimentally investigated in laboratory scale microcosms. By exposing the plant-soil systems to varying amounts of ethanolamine, ...

    • Experimental assessment of the oxidation inhibitor KI on fresh and pre-used amines 

      Thorstad, Silje (Master thesis, 2021)
      Økningen i den globale overflatetemperaturen er et alvorlig verdensomspennende problem som kan føre til katastrofale konsekvenser. Antropogene karbondioksid (CO2) utslipp fra kraftverk som bruker fossilt drivstoff er en ...

    • Important Aspects Regarding the Chemical Stability of Aqueous Amine Solvents for CO2 Capture 

      Vevelstad, Solrun Johanne; Buvik, Vanja; Knuutila, Hanna K; Grimstvedt, Andreas Magnar; Silva, Eirik Falck da (Journal article; Peer reviewed, 2022)
      The chemical stability of aqueous amines is an essential property to study before new amines are introduced in pilot plants, to reduce risks related to the operation, cost and environment. There are no standard methods for ...

    • Introduction of Potassium Iodide as an Inhibitor for Oxidative Degradation of Amines 

      Buvik, Vanja; Thorstad, Silje; Ramos Wanderley, Ricardo; Knuutila, Hanna K (Chapter, 2021)
      Oxidative degradation of amines for CO2 capture is a challenge that has yet to be overcome. This work presents the potential of using potassium iodide as a stable inhibitor, potentially without the need for replenishment ...

    • Kvantitering av nitrogenholdige degraderingsprodukter i aminløsninger 

      Laukvik, Marianne; Laukvik, Tonje (Bachelor thesis, 2019)
      I lys av økt mengde klimagasser i atmosfæren, har CO2-fangst blitt et stadig viktigere satsningsområde. Store mengder CO2 emitteres ut i atmosfæren som følge av intensivert forbrenning av fossilt brennstoff. Behovet for ...

    • Machine Learning Modelling of the Oxidative and Thermal Degradation of Monoethanolamine (MEA) 

      Solnes, Ingvild (Master thesis, 2021)
      Folketallet i verden vokser, noe som fører til en økning i forbruket av ressurser og utslipp av klimagasser. Som et resultat av dette øker konsentrasjonene av klimagasser i atmosfæren til farlige nivåer, og behovet for ...

    • Measurement and prediction of oxygen solubility in post-combustion CO2 capture solvents 

      Buvik, Vanja; Bernhardsen, Ida; Figueiredo, Roberta V.; Vevelstad, Solrun Johanne; Goetheer, Earl L.V.; van os, peter (Peer reviewed; Journal article, 2020)
      This work aims to understand oxygen solubility in pure and aqueous amine solvents for CO2 capture. Commercially available dissolved oxygen sensors were studied to evaluate whether these can be used for measuring oxygen ...

    • 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 ...

    • Stability of amines for CO2 capture 

      Buvik, Vanja (Doctoral theses at NTNU;2021:257, Doctoral thesis, 2021)
      Despite of being a well-tested and highly attractive technology for capture of carbon dioxide (CO2), amine scrubbing encounters economic and operational challenges originating from degradation of the amine solvent, in ...

    • 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 ...

    • Stability of Structurally Varied Aqueous Amines for CO2 Capture 

      Buvik, Vanja; Vevelstad, Solrun Johanne; Brakstad, Odd Gunnar; Knuutila, Hanna K (Peer reviewed; Journal article, 2021)
      Eighteen structurally varied amines were subjected to harsh oxidative conditions, and their stability was assessed and seen in the context of biological and thermal stability. Steric effects play a large role in the ...

    • Synthesis of conjugated unsaturated Amino Acids 

      Buvik, Vanja (Master thesis, 2016)
      Of the three main groups of biomolecules - lipids, carbohydrates and proteins - lipids and carbohydrates containing polyene functionalities have already been investigated. This thesis describes a first approach to the ...

    • Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture 

      Pinto, Diego Di Domenico; Zahraee, Znar; Buvik, Vanja; Hartono, Ardi; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)
      Post combustion CO2 capture is still a rather energy intense, and therefore expensive, process. Much of the current research for reducing the process energy requirements is focused on the regeneration section. A good ...