Browsing NTNU Open by Author "Knuutila, Hanna"
Now showing items 1-20 of 65
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A Techno-Economic Evaluation of Solvents in Biogas Upgrading
Cornell, Emma Solheim (Master thesis, 2023)Antropogene klimagassutslipp er anerkjent som hoved ̊arsaken til globale klimaendringer. For å begrense virkningene av klimaendringer er integrasjonen av fornybare energikilder i energisammensetningen avgjørende. Biometan ... -
Absorption of CO2 in lyotropic liquid crystals
Rodriguez Fabia, Sandra; Øyen, Marita; Winter-Hjelm, Nicolai; Norrman, Jens; Lund, Reidar; Sørland, Geir; Knuutila, Hanna; Sjøblom, Johan; Paso, Kristofer Gunnar (Peer reviewed; Journal article, 2020)Vapor–liquid equilibria data of three poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide)/water liquid crystals (LCs) with CO2 has been obtained up to 6 bar. The investigated LCs consist of 60% (EO)3(PO)50(EO)3 ... -
Activity-based Kinetics of the Reaction of Carbon Dioxide with Aqueous Amine Systems. Case studies: MAPA and MEA
Monteiro, Juliana Garcia Moretz-Sohn; Pinto, Diego Di Domenico; Luo, Xiao; Knuutila, Hanna; Hussain, Saddam; Mba, Emmanuel; Hartono, Ardi; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2013) -
Calorimetric measurements with CO2 capture solvents - Heat capacity, Cp, measurements for loaded and unloaded alkanolamine solutions using CPA202 Reaction Calorimeter
Amundsen, Paul Magne (Master thesis, 2015)Most chemical and physical processes are accompanied by heat effects, which may contain significant information concerning the mechanisms of the processes. Quantitative knowledge of the thermodynamic properties of CO2 ... -
Carbon dioxide capture with carbonate systems
Knuutila, Hanna (Doktoravhandlinger ved NTNU, 1503-8181; 2009:115, Doctoral thesis, 2009) -
Characterization of a solvent for chemical absorption-based CO2 capture
Bunevska, Tanja (Master thesis, 2021)The diploma thesis is focused on the thermodynamic characterization of an aqueous 3-amino-1-propanol (AP) solution, which is used as a promising solvent for post-combustion CO2 capture from exhaust gases. The theoretical ... -
CO2 absorption from industrial clusters
Anglevik, Jakob (Master thesis, 2022)Denne oppgaven har brukt Aspen plus til å simulere forskjellige konfigurasjoner for CO2 fangst, for å finne den mest effektive måten å fange CO2 fra flere utslippskilder ved å bruke aminabsorpsjon. Dette er gjort ved å ... -
CO2 Capture by Chemical Absorption: Kinetics and Combined Heat and Mass Transfer
Putta, Koteswara Rao (Doctoral theses at NTNU;, Doctoral thesis, 2017)Currently, global warming is an alarming issue. Tremendous efforts are being made in the research area to develop new and improved CO2 capture technologies in recent years. Many small-scale pilot test rigs and semi-industrial ... -
Combined subsea hydrate control and H2S removal
Shoukat, Usman (Doctoral theses at NTNU;2019:127, Doctoral thesis, 2019)In Norway natural gas production mostly comes from offshore facilities and contains impurities such as acid gases (hydrogen sulfide (H2S) & carbon dioxide (CO2)), water vapor, and mercury, etc. These impurities can cause ... -
Corrosion and degradation in amine based post-combustion CO2 capture
Fytianos, Georgios (Doctoral thesis at NTNU;2016:98, Doctoral thesis, 2016)Consumption of coal is expanding, and without CO2 capture and storage (CCS) or some other advanced coal combustion system, the most emission intensive gas, CO2, will continue to worsen climate change. Among the various ... -
Creating a machine learning based surrogate model for modelling of a carbon capture plant
Bendiksen, Anders Siwadune (Master thesis, 2022)Dagens metoder for å gjøre en parameterstudie av et karbonfangstanlegg er ofte en treg prosess som krever mye innsats og manuell input. For å gjøre denne pros- essen mindre arbeidskrevende ble et neuralt nettverk konstruert ... -
Decomposition of nitrosamines in aqueous monoethanolamine (MEA) and diethanolamine (DEA) solutions with UV-radiation
Knuutila, Hanna; Svendsen, Hallvard Fjøsne; Asif, Naveed (Journal article; Peer reviewed, 2014)CO2 capture based on chemical absorption using amine solutions is considered to be the most feasible way to remove CO2 from low pressure sources. However, amines, when exposed to nitrous oxides, may form nitrosamines which ... -
Degradation of Amines
Johansen, Maren Teresa (Master thesis, 2013)In view of the rising amounts of greenhouse gases in the atmosphere, preventing CO2 emissions has become increasingly important. The combustion of fossil fuels for energy production and transportation is a large contributor ... -
Density measurements and modelling of loaded and unloaded aqueous solutions of MDEA (N-methyldiethanolamine), DMEA (N,N-dimethylethanolamine), DEEA (diethylethanolamine) and MAPA (N-methyl-1,3-diaminopropane)
Pinto, Diego Di Domenico; Monteiro, Juliana Garcia Moretz-Sohn; Johnsen, Birgit; Svendsen, Hallvard Fjøsne; Knuutila, Hanna (Journal article; Peer reviewed, 2014) -
Destruction of nitrosoamines with UV-light
Knuutila, Hanna; Svendsen, Hallvard Fjøsne; Asif, Naveed (Journal article; Peer reviewed, 2013)In this paper the destruction of nitrosamines (NDMA and NDELA) in 30wt% MEA, 50wt% DEA and water wash solutions with UV-irradiation are presented and linked to measured penetration depths of UV- light. The results show ... -
Development of Solvent Degradation Models for Amine-Based CO2 Capture
Braakhuis, Lucas (Doctoral theses at NTNU;2024:54, Doctoral thesis, 2024)Carbon capture and storage can be essential for achieving short-term emission reductions to reach climate goals and realizing the decarbonization of hard-to-abate sectors in the future. Aside from logistical and political ... -
Effect of MEA's degradation products on corrosion at CO2 capture plants
Fytianos, Georgios; Grimstvedt, Andreas Magnar; Knuutila, Hanna; Svendsen, Hallvard Fjøsne (Journal article; Peer reviewed, 2014)Amine degradation and corrosion can be a severe operational problem in the CO2 absorption process. In this paper the effect of MEA's degradation products on corrosion is studied. Different solutions of MEA 30wt% containing ... -
Effect of Solvent Composition on Solvent Properties of Non-Aqueous and Low Aqueous Solvents
Caballero Ponce, Gonzalo José (Master thesis, 2018)The high amounts of CO2 emissions can be minimized by applying Carbon Capture and Storage (CCS) technology. Chemical absorption with amines, or amine scrubbing, is one of the available technologies. In this technology, a ... -
Electric steam methane reforming - Economical and environmental implications of replacing methane with electricity for heating in a steam methane reformer
Bukkholm, Ida Synnøve (Master thesis, 2021)Grønn energi har fått en trekkraft som et resultat av økt fokus på bærekraft, og det blir forsket på mer enn noen gang før. Ettersom fossile brennstoff er skadelig for miljøet, er det på tide at de byttes ut. Hydrogen er ... -
Employing Machine Learning for solvent development in the CO2 capture industry
Jónsson, Bjarni Máni (Master thesis, 2023)Motivasjonen bak denne forskningen var å dypere forstå maskinlæring (ML) algoritmer og metoder, spesielt med hensyn til manglende data, med mål om å kartlegge ønskede egenskaper og strukturer i aminløsningsmidler, brukt i ...