Blar i Institutt for kjemisk prosessteknologi på forfatter "Evjen, Sigvart"

Viser treff 1-8 av 8

    • Aerosol growth in CO2 absorption with MEA, modelling and comparison with experimental results 

      Svendsen, Hallvard Fjøsne; Majeed, Hammad; Knuutila, Hanna K; Hillestad, Magne; Evjen, Sigvart; Mejdell, T.; Einbu, A.; Hjarbo, Kai Wilhelm; Haugen, G.; Hoff, K.A. (Peer reviewed; Journal article, 2021)
      A new and improved aerosol model has been developed and tested against experimental data. An e-NRTL equilibrium model for MEA was extended to cover sulphuric acid containing droplets and validated against new eboulliometer ...

    • Aminoalkyl-functionalized pyridines as high cyclic capacity CO2 absorbents 

      Evjen, Sigvart; Løge, Oda Siebke; Fiksdahl, Anne; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)
      Recent years have witnessed a growing academic interest in development of new CO2 capture solvents to reduce the capture costs. This study focused on nine picolylamines (three commercial and six synthesized) and one ...

    • Degradative behavior and toxicity of alkylated imidazoles 

      Evjen, Sigvart; Åstrand, Ove Alexander Høgmoen; Gaarder, Mona; Paulsen, Ragnhild Elisabeth; Fiksdahl, Anne; Knuutila, Hanna K (Journal article; Peer reviewed, 2020)
      The thermal and oxidative degradation behavior and the corrosiveness of imidazole (Im), 2-methylimidazole (2MIm), 2-ethyl-4-methylimidazole (2E4MIm), 2,4,5-trimethylimidazole (2,4,5MIm), and 1,2,4,5-tetramethylimidazole ...

    • High-Capacity Amine-Imidazole Solvent Blends for CO2 Capture 

      Evjen, Sigvart; Fiksdahl, Anne; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)
      The CO2 absorption performance of aqueous solvent blends containing four imidazoles (2-MeIm, 2-Et-4-MeIm, 2,4,5-MeIm and 1,2,4,5-MeIm) and four promoters (MEA, DEA, PZ, and MAPA) were investigated using a small-scale ...

    • New Polyalkylated Imidazoles Tailored for Carbon Dioxide Capture 

      Evjen, Sigvart; Fiksdahl, Anne; Pinto, Diego Di Domenico; Knuutila, Hanna K (Journal article; Peer reviewed, 2018)
      Aqueous polyalkylated imidazoles have gained interest as potential CO2 capture solvents due to their high oxidative stability and low vapor pressures compared to traditional amines. In this work, 21 aqueous solutions of ...

    • Rapid, comprehensive screening of ionic liquids towards sustainable applications 

      Venkatraman, Vishwesh; Evjen, Sigvart; Kallidanthiyil Chellappan, Lethesh; Raj, Jaganathan Joshua; Knuutila, Hanna K; Fiksdahl, Anne (Peer reviewed; Journal article, 2019)
      A computational screening strategy applied to 8 million synthetically diverse ionic liquids, demonstrates its value for sustainable solvent design. In contrast to previous studies which have largely focused on single ...

    • The Salting-out Effect in Some Physical Absorbents for CO2 Capture 

      Wanderley, Ricardo Ramos; Evjen, Sigvart; Pinto, Diego Di Domenico; Knuutila, Hanna K (Journal article; Peer reviewed, 2018)
      The solubility of CO2 in organic solvents N-methyl-2-pyrrolidone (NMP), methanol and monoethylene glycol (MEG) at 30 °C was measured together with its heat of absorption. The salts lithium nitrate (LiNO3), lithium chloride ...

    • Viscosity, Density and Volatility of Binary Mixtures of Imidazole, 2-Methylimidazole, 2,4,5-Trimethylimidazole and 1,2,4,5-Tetramethylimidazole with Water 

      Evjen, Sigvart; Wanderley, Ricardo Ramos; Fiksdahl, Anne; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)
      Experimental measurements and modeling of the density and viscosity of binary solutions of imidazole, 2-methylimidazole, 2,4,5-trimethylimidazole, and 1,2,4,5-tetramethylimidazole with water have been conducted. The ...