Blar i NTNU Open på forfatter "Knuutila, Hanna K"
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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 ... -
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 ... -
Densities, Viscosities of Pure 1-(2-Hydroxyethyl) Pyrrolidine, 3-Amino-1-Propanol, Water, and Their Mixtures at 293.15 to 363.15 K and Atmospheric Pressure
Hartono, Ardi; Knuutila, Hanna K (Peer reviewed; Journal article, 2023)Densities and viscosities of pure 1-(2-hydroxyethyl) pyrrolidine, 3-amino-1-propanol, water, and their blends’ data are reported from 293.15 to 363.15 K and at ambient pressure. Densities of pure water show higher values ... -
Density and Viscosity for the Non-aqueous and Aqueous Mixtures of Methyldiethanolamine and Monoethylene Glycol at Temperatures from 283.15 K to 353.15 K
Skylogianni, Eirini; Wanderley, Ricardo Ramos; Austad, Sigrid Steinsli; Knuutila, Hanna K (Journal article; Peer reviewed, 2020)Nonaqueous and aqueous mixtures of methyldiethanolamine and monoethylene glycol form promising absorbents for the combined hydrogen sulfide removal and hydrate control, necessary in natural gas processing. In this direction, ... -
Density calculations of aqueous amine solutions using an excess Gibbs based model
Pinto, Diego Di Domenico; Knuutila, Hanna K (Peer reviewed; Journal article, 2019)Accurate representation of the physical properties of a solvent is essential for design and simulation of processes. Density and viscosity, for instance, have an important role in modelling and designing absorption and ... -
Describing CO2-Absorbent Properties in AspenPlus
Ros, Jasper; Brilman, Derk; Bernhardsen, Ida; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)For the modelling of novel solvent systemsfor CO2-capture in AspenPlus®, data fitting of physical-chemical properties is needed. In this work the challenges and results are presented for fitting such experimental data for ... -
Design and operation of water-wash sections to minimize MEA emissions
Francois, Maxime Herve Jean-Jacques; Hartono, Ardi; Svendsen, Hallvard Fjøsne; Hoff, Karl Anders; Knuutila, Hanna K (Journal article, 2022)Whether in gaseous or aerosol form, mitigation of emissions from absorption-based carbon capture remains a real challenge. Among the available control technologies, water-wash is one of the most conventional and has been ... -
Determination of kinetics of CO2 absorption in unloaded and loaded DEEA+MAPA blend
Garcia, Monica; Knuutila, Hanna K; Gu, Sai (Journal article; Peer reviewed, 2017)Alkanolamine blends are of high interest as solvents to enhance the CO2 capture technology in comparison to the traditional 5 M MEA. In the present work, the mass transfer and kinetics coefficients of the unloaded and ... -
Development of Membrane Contactors Using Phase Change Solvents for CO2 Capture: Material Compatibility Study
Ansaloni, Luca; Asad, Arif; Çiftja, Arlinda; Knuutila, Hanna K; Deng, Liyuan (Journal article; Peer reviewed, 2016)Phase change solvents represent a new class of CO2 absorbents with a promising potential to reduce the energy penalty associated with CO2 capture. However, their high volatility is a major concern for their use at the ... -
Development of membrane contactors using volatile amine-based absorbents for CO2 capture: amine permeation through the membrane
Ansaloni, Luca; Rennemo, Rune; Knuutila, Hanna K; Deng, Liyuan (Journal article; Peer reviewed, 2017)Non-porous membrane contactor offers the possibility to reduce the amine emissions if the membrane layer is specifically designed to act as a barrier for the amine transport. In the present paper, the amine permeation ... -
Effect of Amine Volatility on Aerosol Droplet Development in Absorption Columns
Majeed, Hammad; Knuutila, Hanna K; Hillestad, Magne; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2017)In absorption processes aerosols are generated by spontaneous condensation or desublimation processes in supersaturated gas phases. Amine volatility is a vital screening parameter for amines to be used in CO2 capture. ... -
Effect of liquid viscosity on the performance of a non-porous membrane contactor for CO2 capture
Bernhardsen, Ida; Ansaloni, Luca; Betten, Hanne Kalvøy; Deng, Liyuan; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)The effect of liquid viscosity on the performance of a non-porous membrane contactor is important to study for a proper solvent selection and process design. In this work, the overall mass transfer coefficient for MEA- and ... -
Effect of the concentration of MAPA on the heat of absorption of CO2 and on the cyclic capacity in DEEA-MAPA blends
Knuutila, Hanna K; Nannestad, Åsne (Journal article; Peer reviewed, 2017)n this work, the heat of absorption of CO2 in aqueous blends of 2-(diethylamino)ethanol (DEEA) and 3-(methylamino)propylamine (MAPA) were measured as a function of CO2 loading at 40 °C, 80 °C and 120 °C. The main objective ... -
Effect of Uncertainties in Solvent Properties on the Techno-economic Performances of a CO2 Absorber
Kuncheekanna, Vishalini Nair; Jakobsen, Jana Poplsteinova; Knuutila, Hanna K (Peer reviewed; Journal article, 2020)The use of computational models and simulation tools is vital for design and optimisation of CO2 absorption processes. When developing these tools, mathematical submodels such as models for physical properties and mass and ... -
Effect of Various Parameters on the Thermal Stability and Corrosion of CO2-Loaded Tertiary Amine Blends
Shoukat, Usman; Knuutila, Hanna K (Peer reviewed; Journal article, 2020)In this study, the thermal stability and corrosivity of various CO2-loaded tertiary amine blends in both aqueous and non-aqueous form in stainless steel cylinders were studied for combined acid gas and water removal. The ... -
Evaluating the possibility of high-pressure desorption of CO2 via volatile co-solvent injection
Ramos Wanderley, Ricardo; Knuutila, Hanna K (Peer reviewed; Journal article, 2021)This work evaluates the possibility of employing a volatile co-solvent injection for recovering CO2 from loaded monoethanolamine at 120 °C under pressures above those achievable through regular desorption processes. This ... -
Evaluation of Solvent Degradation in Amine-Based Post-Combustion Capture Process Simulations.
Braakhuis, Lucas; Knuutila, Hanna K (Journal article, 2022)It is important to limit solvent degradation in amine-based post combustion capture systems, as it can lead to challenges, such as solvent losses, reductions in process performance, increased emissions, and corrosion of ... -
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 investigation of inlet vane design and performance in hydrocarbon systems
Setekleiv, Alf Eddie; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)Separation efficiencies for a scrubber inlet vane section was investigated using a natural gas hydrocarbon system at 20, 50 and 85 bars. Several design features were investigated such as diameter of inlet pipe, vane design, ...