Browsing NTNU Open by Author "Knuutila, Hanna K"
Now showing items 41-60 of 85
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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, ... -
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 ... -
From hybrid solvents to water-lean solvents – A critical and historical review
Wanderley, Ricardo Ramos; Pinto, Diego Di Domenico; Knuutila, Hanna K (Journal article; Peer reviewed, 2020)Every year, a plethora of studies focused on developing water-lean solvents for CO2 capture is published in the scientific literature. More often than not, these studies lack a satisfactory contextualization with the ... -
Gas phase amine depletaion created by aerosol formation and growth
Majeed, Hammad; Knuutila, Hanna K; Hillestad, Magne; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2017)Aerosols are systems of droplets or wet particles suspended in gases. In post combustion CO2 absorption systems aerosols can be formed by spontaneous phase transitions in supersaturated gas phases or by droplets or particles ... -
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 ... -
Hydrogen Sulfide Solubility in 50 wt.% and 70 wt.% Aqueous Methyldiethanolamine at Temperatures from 283 to 393 K and Total Pressures from 500 to 10000 kPa
Skylogianni, Eirini; Mundal, Ingvild; Pinto, Diego Di Domenico; Coquelet, Christophe; Knuutila, Hanna K (Peer reviewed; Journal article, 2020)The hydrogen sulfide (H2S) absorption capacity of a 70 wt% aqueous methyldiethanolamine (MDEA) solution was investigated in a static-analytic apparatus at temperatures of 283, 353 and 393 K and pressures of 2000, 6000 and ... -
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 pKa on solvent performance of MAPA promoted tertiary amines
Bernhardsen, Ida Mortensen; Krokvik, Iris Renate Tøkje; Perinu, Cristina; Pinto, Diego Di Domenico; Jens, Klaus-Joachim; Knuutila, Hanna K (Journal article; Peer reviewed, 2018)In the present work, absorption and desorption performance of ten single tertiary amines and their blends with MAPA was studied using a screening apparatus. Absorption experiments were conducted at 40 °C and up to 9.5 kPa ... -
Influence of substitution of water by organic solvents in amine solutions on absorption of CO2
Garcia, Monica; Knuutila, Hanna K; Aronu, Ugochukwu Edwin; Gu, Sai (Journal article; Peer reviewed, 2018)Aqueous amine solutions are the most used solvents for chemical absorption of CO2. Substituting part of the water by organic solvents in aqueous amine solutions aims to take advantage of the lower partial pressure and ... -
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 ... -
Investigating opportunities for water-lean solvents in CO2 capture: VLE and heat of absorption in water-lean solvents containing MEA
Wanderley, Ricardo Ramos; Pinto, Diego Di Domenico; Knuutila, Hanna K (Journal article; Peer reviewed, 2020)A thorough investigation on a set of organic diluents for water-lean solvent formulation has been carried in this work. The performance of aqueous monoethanolamine (MEA) 30 %w/w has been compared to that of mixtures between ... -
Kinetics of CO2 absorption into aqueous solutions of 3-dimethylamino-1-propanol and 1-(2-hydroxyethyl)pyrrolidine in the blend with 3-(methylamino)propylamine
Bernhardsen, Ida; Knuutila, Hanna K (Journal article, 2019)The kinetics of CO2 absorption into unloaded aqueous solutions of 3-dimethylamino-1-propanol (3DMA1P) and 1-(2-hydroxyethyl)pyrrolidine (1-(2HE)PRLD) blended with 3-(methylamino)propylamine (MAPA) were studied in the ... -
Mapping Diluents for Water-Lean Solvents: A Parametric Study
Wanderley, Ricardo Ramos; Knuutila, Hanna K (Peer reviewed; Journal article, 2020)Water-lean solvents are typically defined as mixtures between an organic diluent and an amine. These solvents are thought to deliver potential benefits in CO2 capture systems, such as enhanced mass transfer properties, ... -
Membrane Contactors for Post-Combustion CO2 Capture: Model Development, Sensitivity Analysis, and Application to CO2 Capture from a Coal-fired Power Plant
Gebremariam, Solomon K.; Jonassen, Øystein; Pinto, Diego Di Domenico; Knuutila, Hanna K (Journal article, 2022)A hollow fiber membrane contactor (HFMC) model for CO2 absorption using monoethanol amine (MEA) as an absorbent is developed based on a one-dimensional-two-dimensional modeling approach, where plug flow is assumed in the ... -
Modeling the Formation of Degradation Compounds during Thermal Degradation of MEA
Braakhuis, Lucas; Høisæter, Karen Karolina; Knuutila, Hanna K (Peer reviewed; Journal article, 2022)A kinetic model has been developed to predict thermal degradation of aqueous solutions of monoethanolamine (MEA) in carbon capture. The model focusses on both the degradation rate of the amine and the formation rates of ... -
Modelling and Evaluating Carbamate Polymerization of Monoethanolamine in Post-Combustion Carbon Capture
Braakhuis, Lucas; Knuutila, Hanna K (Chapter, 2021) -
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 ... -
New solvent blends for post-combustion CO2 capture
Knuutila, Hanna K; Rennamo, Rune; Çiftja, Arlinda (Journal article; Peer reviewed, 2019)In the current work five different solvent blends are experimentally studied and the reboiler duties are calculated using the so-called short-cut method. Tertiary amines, 2-(diethylamino)ethanol (DEEA), 3-(Diethylamino)- ...