Browsing NTNU Open by Author "Knuutila, Hanna K"
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A review of potential amine solvents for CO2 absorption process: Absorption capacity, cyclic capacity and pKa
Bernhardsen, Ida Mortensen; Knuutila, Hanna K (Journal article; Peer reviewed, 2017)Solvent selection is an important element to enable low energy requirement in post combustion CO2 capture process by means of chemical absorption. In this paper, we investigated the CO2 capture performance of 132 different ... -
Absorption and Desorption Study of Alkylamine Promoted DEEA Solvents for CO2 Capture
Bernhardsen, Ida Mortensen; Perinu, Cristina; Jens, Klaus-Joachim; Pinto, Diego Di Domenico; Knuutila, Hanna K (Journal article; Peer reviewed, 2018)Three primary and two secondary mono-alkylamines, and a di-alkylamine (3 (Methylamino)propylamine, MAPA) were investigated in blend with a tertiary amine (2-(Diethylamino)ethanol, DEEA). The aim of the study was to ... -
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 ... -
Analysis and selection of optimal solvent-based technologies for biogas upgrading
Carranza Abaid, Andres; Ramos Wanderley, Ricardo; Knuutila, Hanna K; Jakobsen, Jana Poplsteinova (Journal article; Peer reviewed, 2021)Biogas upgrading is an important industrial process for producing biomethane, a sustainable energy source with low carbon footprint. There are three main solvent-based alternatives for biogas upgrading: water scrubbing, ... -
Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions
Putta, Koteswara Rao; Tobiesen, Finn Andrew; Svendsen, Hallvard Fjøsne; Knuutila, Hanna K (Journal article, 2017)In many chemical industrial processes, mass transfer across gas-liquid interfaces accompanied by chemical reaction is the governing phenomena. In case of mass transfer accompanied by a chemical reaction in the liquid phase, ... -
Aqueous Mapa, DEEA, and Their Blend as CO2 Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data
Perinu, Cristina; Bernhardsen, Ida; Pinto, Diego Di Domenico; Knuutila, Hanna K; Jens, Klaus-Joachim (Journal article; Peer reviewed, 2019)On the basis of speciation by nuclear magnetic resonance (NMR) spectroscopy, heat of absorption, and pH data, the reactions occurring in aqueous MAPA (3-(methylamino)propylamine), DEEA (2-(diethylamino)ethanol), and their ... -
ATR-FTIR Model Development and Verification for Qualitative and Quantitative Analysis in MDEA–H2O–MEG/TEG–CO2 Blends
Shoukat, Usman; Baumeister, Eva; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)A Fourier transform infrared (FTIR) spectroscopy method was developed to identify and quantify various components in an amine-based combined acid gas and water removal process. In this work, an attenuated total reflectance ... -
Calorimetric Studies of Precipitating Solvent System
Hartono, Ardi; Kim, Inna; Knuutila, Hanna K; van der Ham, L.V; Goetheer, Earl (Journal article; Peer reviewed, 2017)Calorimetric study of a precipitating solvent system of Potassium-Taurate (KTAU) was performed in the CPA202 calorimeter. Two different experiments were conducted, i.e. heat of absorption of CO2 in KTAU solvent at different ... -
Carbon dioxide solubility in mixtures of methyldiethanolamine with monoethylene glycol, monoethylene glycol–water, water and triethylene glycol
Skylogianni, Eirini; Perinu, Cristina; Cervantes Gameros, Blanca Y.; Knuutila, Hanna K (Peer reviewed; Journal article, 2020)Carbon dioxide solubility in non-aqueous and aqueous mixtures of methyldiethanolamine (MDEA) with monoethylene glycol (MEG) was studied due to the relevance of these solvents for the combined acid gas removal and hydrate ... -
Characterization and modelling of aerosol droplet in absorption columns
Majeed, Hammad; Knuutila, Hanna K; Hillestad, Magne; Svendsen, Hallvard Fjøsne (Journal article, 2017)Formation of aerosols can cause serious complications in industrial exhaust gas cleaning processes. Small mist droplets and fog formed can normally not be removed in conventional demisting equipment because their submicron ... -
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 ... -
CO2 absorption into loaded aqueous MEA solutions: Impact of different model parameter correlations and thermodynamic models on the absorption rate model predictions
Putta, Koteswara Rao; Svendsen, Hallvard Fjøsne; Knuutila, Hanna K (Journal article, 2017)A two-dimensional discretized rate-based model was used for assessing the impact of correlations and/or models for VLE (thermodynamics), solubility (CO2 henry’s law constant), reaction rate kinetic models and diffusivity ... -
CO2 absorption into loaded aqueous MEA solutions: Impact of different model parameter correlations and thermodynamic models on the absorption rate model predictions
Putta, Koteswara Rao; Svendsen, Hallvard Fjøsne; Knuutila, Hanna K (Journal article; Peer reviewed, 2017)A two-dimensional discretized rate-based model was used for assessing the impact of correlations and/or models for VLE (thermodynamics), solubility (CO2 henry’s law constant), reaction rate kinetic models and diffusivity ... -
CO2 capture using highly viscous amine blends in non-porous membrane contactors
Ansaloni, Luca; Hartono, Ardi; Awais, Muhammad; Knuutila, Hanna K; Deng, Liyuan (Journal article; Peer reviewed, 2018)New amine blends have shown a promising potential to reduce the energy penalty for CO2 capture in post combustion, making the deployment of carbon capture technologies one-step closer. However, their application at the ... -
CO2 in Lyotropic Liquid Crystals: Phase Equilibria Behavior and Rheology
Rodriguez Fabia, Sandra; Norrman, Jens; Knuutila, Hanna K; Sjøblom, Johan; Paso, Kristofer Gunnar (Journal article; Peer reviewed, 2019)The CO2 absorption of liquid crystalline phases of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (Pluronic L92, (EO)8(PO)47(EO)8), monoethanolamine (MEA), and water, with a composition of 60% L92/10% ... -
CO2 solubility and mass transfer in water-lean solvents
Wanderley, Ricardo Ramos; Yuan, Ye; Rochelle, Gary T.; Knuutila, Hanna K (Journal article; Peer reviewed, 2019)Shifting from aqueous to water lean solvents has been evaluated as a mean for increasing the mass transfer rates in regular chemical solvents with amines. An array of amines (monoethanolamine, 2-methylpiperazine and N-methyl ... -
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 ... -
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 ... -
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, ...