Blar i Institutt for kjemisk prosessteknologi på forfatter "Vevelstad, Solrun Johanne"

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    • Challenges Related to Analysis of Anions in Degraded Samples from Pilot and Lab Experiments 

      Vevelstad, Solrun Johanne; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2016)
      Analyses of degraded samples from CO2 capture experiments and pilots are complicated because of the diversity of the degradation compounds and the high amine and CO2 contents in the samples. Little work has been conducted ...

    • Characterization of 2-Piperidineethanol and 1-(2-Hydroxyethyl)piperidine as strong bicarbonate forming solvents for CO2 Capture 

      Hartono, Ardi; Rennemo, Rune; Awais, Muhammad; Vevelstad, Solrun Johanne; Brakstad, Odd Gunnar; Kim, Inna; Knuutila, Hanna K (Journal article; Peer reviewed, 2017)
      The solubility of CO2 in the aqueous solutions of 50 mass% 2-Piperidineethanol (2-PPE) and 40 mass% 1-(2-Hydroxyethyl)pyrrolidine (1-(2HE)PRLD) was measured at temperatures from 40 to 120 °C at CO2 loading from 0.04 to 0.8 ...

    • Chemical Stability and Characterization of Degradation Products of Blends of 1-(2-Hydroxyethyl)pyrrolidine and 3-Amino-1-propanol 

      Vevelstad, Solrun Johanne; Grimstvedt, Andreas Magnar; Francois, Maxime; Knuutila, Hanna K; Haugen, Geir; Wiig, Merete; Vernstad, Kai (Peer reviewed; Journal article, 2022)
      Aqueous amine solvents are used to capture CO2 from various flue gas sources. In this work, the chemical stability of a blend of 3-amino-1-propanol (3A1P) and 1-(2-hydroxyethyl)pyrrolidine [1-(2HE)PRLD] was studied. The ...

    • Degradation and corrosion inhibitors for MEA-based CO2 capture plants 

      Fytianos, Georgios; Vevelstad, Solrun Johanne; Knuutila, Hanna K (Journal article; Peer reviewed, 2016)
      In amine based post-combustion CO2 capture and storage, solvent degradation and corrosion of steel materials are the main operational challenges. In this paper the focus was on minimizing degradation and corrosion by ...

    • 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 ...

    • Extensive dataset for oxidative degradation of ethanolamine at 55-75 °C and oxygen concentrations from 6 to 98% 

      Vevelstad, Solrun Johanne; Johansen, Maren T; Knuutila, Hanna K; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2016)
      Post combustion CO2 capture using amines as chemical absorbents is a relatively mature technology. Rate of reaction and desorption energy demand are normally prime criteria for evaluation of new solvents while degradation ...

    • Formation et destruction de NDELA dans des solutions de 30%m de MEA (Monoétha-nolamine) et de 50%m de DEA (Diéthanolamine) 

      Knuutila, Hanna; Asif, Naveed; Vevelstad, Solrun Johanne; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2014)
      The formation of nitrosodiethanolamine (NDELA) in a lab scale pilot was studied by feeding known amounts of nitrogen oxide and nitrogen dioxide into the gas entering the absorber. In the same pilot, the destruction by ...

    • 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. ...

    • 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 ...

    • Influence of experimental setup on amine degradation 

      Vevelstad, Solrun Johanne; Grimstvedt, Andreas Magnar; Knuutila, Hanna; Silva, Eirik Falck da; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2014)
      Chemical stability of amines under CO2 capture conditions is a well known problem both for process operability and related to economy and environmental issues. Many degradation studies have been conducted under different ...

    • 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 ...

    • Mechanisms and Reaction Pathways in MEA Degradation; A Computational Study 

      Gupta, Mayuri; Vevelstad, Solrun Johanne; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2014)
      The mechanistic details on formation of HEGly and HEPO in MEA degradation are studied using the ab initio and density functional theory methods. The energetics of various pathways leading to formation of HEGly and HEPO are ...

    • Modeling of oxidative MEA degradation 

      Pinto, Diego Di Domenico; Brodtkorb, Thea Wilhelmine; Vevelstad, Solrun Johanne; Knuutila, Hanna; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2014)
      Considerable amount of work had been recently done researching the degradation of solvents for CO2 post combustion capture, especially for the benchmark solvent MEA. The degradation of the solvent can cause plant corrosion ...

    • Oxidative degradation of 2-ethanolamine: The effect of oxygen concentraton and temperature on product formation 

      Vevelstad, Solrun Johanne; Grimstvedt, Andreas Magnar; Elnan, Jørund; Silva, Eirik Falck da; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2013)
      Oxidative degradation experiments on 2-ethanolamine (MEA) were performed at four different oxygen concentrations and at two temperatures. MEA loss and degradation product build-up were measured. Increasing the temperature ...

    • Oxidative degradation of amines using a closed batch system 

      Vevelstad, Solrun Johanne; Grimstvedt, Andreas Magnar; Einbu, Aslak; Knuutila, Hanna; Silva, Eirik Falck da; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2013)
      Oxidative degradation experiments on five amines and two amino acids were performed in a new closed setup at atmospheric pressure. For most of the amines/amino acids significant degradation was not present under these ...

    • 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, ...

    • Oxygen and temperature effect on formation of degradation compounds from MEA 

      Vevelstad, Solrun Johanne; Johansen, Maren T; Knuutila, Hanna; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2014)
      Liquid phase degradation of MEA and the formation of 8 degradation compounds were studied at 4 different oxygen concentrations and three different temperatures. Liquid phase total nitrogen was determined and compared with ...

    • Promoted Strong Bicarbonate Forming Solvents for CO2 Capture 

      Hartono, Ardi; Vevelstad, Solrun Johanne; Kim, Inna; Rennemo, Rune; Knuutila, Hanna K (Journal article; Peer reviewed, 2017)
      Effect of different promoters on performance of two bicarbonate forming solvents (HS1 and HS2) was studied in this work and results compared with the performance of 30 wt% MEA and CESAR1 solvents. Based on the results from ...