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Optimization of Operation and Remaining Lifetime of a Subsea System
(Master thesis, 2016)A model of a subsea system was developed and optimization for operation and remaining life time. For the modelling of the remaining life time the compressor efficiency was used as there is no statistical or physical model ... -
Optimization of PEG-based membranes and mixed matrix membranes for CO2 capture
(Doctoral theses at NTNU;2020:35, Doctoral thesis, 2019)Design better CO2 separation membranes for capture CO2 The elevated CO2 concentration has been widely recognized as one of the main factors leading to the increasing serious global warming. To prevent it from continuing ... -
Optimization of PVA Nano-composite Membranes in Membrane Contactor for CO2 Capture
(Master thesis, 2013)The aim of this report is to evaluate and optimize poly vinyl alcohol (PVA) composite membrane containing nanoparticles such as carbon nanotubes (CNTs), titanium dioxide or biofibers cross-linked with glutaraldehyde for ... -
Optimization of Stöber Method to Control Morphology and Enhance Stability of Amine-Functionalized Silica Coated Iron Oxide Nanoparticles
(Master thesis, 2023)Silikabelagte jernoksidnanopartikler har en bemerkelsesverdig kombinasjon av egenskaper, inkludert superparamagnetisme, utmerket stabilitet i vandige løsninger, enkel overflatefunksjonalisering og biokompatibilitet, noe ... -
Optimization of the Numerical Solution of the Population Balance Equation
(Master thesis, 2016)The population balance equation (PBE) is a frequently applied equation in the modeling of multiphase reactors. Accurate solution of the PBE is important in order to have a precise estimate of the interfacial area, which ... -
Optimized synthesis of polyacrylic acid-coated magnetic nanoparticles for high-efficiency DNA isolation and size selection
(Peer reviewed; Journal article, 2023)Solid-phase reversible immobilization (SPRI) bead technology is widely used in molecular biology for convenient DNA manipulation. However, commercial SPRI bead kits lack cost advantages and flexibility. It is, therefore, ... -
Optimizing hollow fiber membranes and membrane process for CO2 capture from shipping /maritime vessels in commercial applications
(Master thesis, 2022)Kontroll av koldioxidutsläpp och avskiljning av koldioxid har blivit en självklarhet sedan den globala uppvärmningen intensifierats. Många konventionella tekniker för Carbon capture and storage (CCS) har visat sig vara ... -
Optimizing methane recovery: Techno-economic feasibility analysis of N2-selective membranes for the enrichment of ventilation air methane
(Peer reviewed; Journal article, 2020)Utilization of the low concentration methane from coal-mining ventilation air is challenging but can significantly contribute to the mitigation of methane emissions to the atmosphere. This work focuses on the techno-economic ... -
Optimizing the Capacity of Thermal Energy Storage in Industrial Clusters
(Chapter, 2020)A key factor for energy-efficient industrial clusters is the recovery of waste heat. To this end, thermal energy storage (TES) is an appealing technology that facilitates dynamic heat integration between supplier and ... -
Optimizing the shape anisotropy of gold nanoparticles for enhanced light harvesting and photocatalytic applications
(Journal article; Peer reviewed, 2022) -
Optimum solvent concentration to lower energy demands for CO2 capture in refinery cases
(Journal article, 2022)An open-access novel low-energy solvent HS-3 has been proposed and verified in the lab scale for post-combustion CO2 capture. The HS-3 solvent consists of a tertiary amine with a strong bicarbonate former and a primary ... -
Organic Electrolytes for Thermoelectric Devices and CNT Electrode functionalization by Nitrogen-doping
(Master thesis, 2012)In this thesis a thermoelectric cell is developed. Aligned Carbon Nanotubes and aligned Nitrogen-doped Carbon Nanotubes are used as electrode materials. Ferri/Ferrocyanide and Tetrabutylammonium Nitrate (TBAN) electrolytes have ... -
Organosolv pretreatment of Norway spruce: Ethanol pretreatment for Biorefinery applications
(Doctoral theses at NTNU;2022:385, Doctoral thesis, 2022)The acceleration of climate change and the depletion of oil reserves forced the society to look for alternative fuel sources. Among the available alternatives, second generation biofuel is gaining attention due to several ... -
Origin of Chemisorption Energy Scaling Relations over Perovskite Surfaces
(Journal article; Peer reviewed, 2019)Rationally tailored perovskites ABO3 are promising substitutes for expensive noble-metal catalysts in heterogeneous catalysis. In this contribution, the BEEF-vdW + U method has been used to examine the adsorption of H, C, ... -
Origin of potassium promotion effects on CuCl2/gamma-Al2O3 catalyzed ethylene oxychlorination
(Peer reviewed; Journal article, 2020)Potassium promoters are widely used in industrial catalysts of ethylene oxychlorination to achieve optimum performance. However, the origin of the promoter effect is not fully understood. Herein, we investigated the potassium ... -
Origin of potassium promotion effects on CuCl2/gamma-Al2O3 catalyzed ethylene oxychlorination
(Peer reviewed; Journal article, 2020)Potassium promoters are widely used in industrial catalysts of ethylene oxychlorination to achieve optimum performance. However, the origin of the promoter effect is not fully understood. Herein, we investigated the potassium ... -
Osmotic membrane pressure actuator
(Master thesis, 2011)This master thesis has focused on the membrane for the osmotic membrane pressure actuator (OMPA). The OMPA is an autonomous inflow control device for intended use in oil and gas wells. Its function is to prevent water from ... -
Overall Process Analysis and Optimisaton for CO2 Capture from Coal Fired Power Plants basen on Phase Change Solvents Forming Two Liquid Phases
(Journal article; Peer reviewed, 2013)In this work the potential of a novel post-combustion CO2 capture process is analysed with respect to the integrated overall process. As solvent a blend of two amines (DEEA/MAPA) which forms two liquid phases under CO2 ... -
Oxidation of Methanol to Formaldehyde (MTF) over Silver Catalyst
(Master thesis, 2020)Arbeidet som er utført i denne master oppgaven hadde som mål å bidra til forståelsen av metanol til formaldehyd reaksjonen, og sølv interaksjonene i disse forholdene. Sølvpartikler, nett og annulær ble behandlet i ulike ... -
Oxidation of Methanol to Formaldehyde over Ag - Kinetic Modelling of Gas Phase Reactions using COMSOL Multiphysics
(Master thesis, 2017)In this master thesis the goal was to create two COMSOL Multiphysics simulation models, one representing the laboratory scaled reactor and the other representing the industrial scale reactor, to study gas phase reactions ...