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Lignosulfonates in Crude Oil Processing: Interactions with Asphaltenes at the Oil/Water Interface and Screening of Potential Applications
(Peer reviewed; Journal article, 2020)The goal of this article is to test the potential application of lignosulfonates (LSs) in crude oil production and processing. Three LS samples of varying hydrophobicity and average molecular weight were considered. First, ... -
Limiting current density as a selectivity factor in electrodialysis of multi-ionic mixtures
(Peer reviewed; Journal article, 2023)Electrodialysis is a promising technology to remove low concentrations of target ions from multi-ionic mixtures. While the synthesis of selective membranes is a prominent topic in research, few studies have been presented ... -
Linear Combination of Gradients as Optimal Controlled Variables
(Peer reviewed; Journal article, 2020)In this paper, we show that optimal economic operation can be achieved using feedback control, by controlling the right variables that translate economic objectives into control objectives. We formulate a generic framework ... -
Linear parameter-varying model for a refuellable zinc-air battery
(Peer reviewed; Journal article, 2020)Due to the increasing trend of using renewable energy, the development of an energy storage system (ESS) attracts great research interest. A zinc–air battery (ZAB) is a promising ESS due to its high capacity, low cost and ... -
Liquid-solid Solubility in AMP-KSAR-CO2-H2O System
(Journal article; Peer reviewed, 2017)Solid-liquid solubility of an example novel precipitating solvent system (NPSS); an aqueous blend of AMP and KSAR with and without CO2 were studied to determine the crystallization and dissolution regimes as well as the ... -
Lithium recovery from battery recycling stream
(Bachelor thesis, 2023)I denne forskningen ble litiumgjenvinningen fra batteriresirkuleringsstrømmen studert. Hensikten var å analysere alle rutene samt gjenvinningsprosessene til litium-ion-batterier, med spesiell vekt på gjenvinning av ... -
Load-Flexible Methanol Production from Intermittent Off-Grid Renewable Energy
(Master thesis, 2023)Denne oppgaven utforsker mulighetene for å produsere e-metanol gjennom "Power-to-Liquid" prosessen ved å bruke energi generert av vindmølleturbiner som ikke er tilkoblet strømnettet for hydrogenproduksjon, etterfulgt av ... -
Long Distance Guidance and Navigation in Bats
(Master thesis, 2015)The motivation for this master thesis was to investigate whether or not the Mexican fish-eating bat, Myotis vivesi, uses information from the earth's magnetic field for navigational purposes. Other possible navigational ... -
Long-term performance of highly selective carbon hollow fiber membranes for biogas upgrading in the presence of H<inf>2</inf>S and water vapor
(Peer reviewed; Journal article, 2022)Biogas is an increasingly attractive renewable resource that needs to be upgraded to meet either the natural gas pipeline quality or the biomethane requirement. The use of carbon membranes is a promising alternative to ... -
Long-term prediction of fish growth under varying ambient temperature using a multiscale dynamic model
(Journal article; Peer reviewed, 2009)Background: Feed composition has a large impact on the growth of animals, particularly marine fish. We have developed a quantitative dynamic model that can predict the growth and body composition of marine fish for a ... -
Low temperature carbon dioxide capture by PEI-modified mesoporous silica: synthesis and performance analysis
(Master thesis, 2021)Mesoporøse silisiumdioksydmidler ble fremstilt ved forskjellige synteseforhold ved konvensjonelle sol-gel-metoder. De stive sfæriske silisiumdioksidene med høyt overflateareal og høy porøsitet i smal distribusjon ble ... -
Low Temperature Selective Hydrogenation Using Pd/Al2O3 Catalysts
(Master thesis, 2020) -
Low-energy properties of electrons and holes in CuFeS2
(Peer reviewed; Journal article, 2022)The antiferromagnetic semiconductor CuFeS2 belongs to a magnetic symmetry class that is of interest for spintronics applications. In addition, its crystal lattice is compatible with Si, making it possible to integrate it ... -
Low-Temperature Oxidation of Methane (CH4) and Carbon Monoxide (CO) over Pd/Al2O3 and Pd-Ag/Al2O3 Catalysts
(Master thesis, 2021)Oksidasjon av metan- og karbonmonoksid ved lave temperaturer blir sett på som lovende løsninger for å kunne møte fremtidens krav om utslippsredusering. Katalytiske systemer gjør det mulig, for eksempel, å omdanne forurensninger ... -
Lyotropic Liquid Crystals: CO2 Capture and Phase Behavior
(Doctoral theses at NTNU;2019:122, Doctoral thesis, 2019)The rising greenhouse gas emissions, in particular CO2, have contributed to an increase of the global temperature. In order to combat the severe effects of climate change, actions are being taken to favor a switch to low ... -
Machine Learning and First Principles Modeling Applied to Multiphase Flow Estimation
(Doctoral theses at NTNU;2020:407, Doctoral thesis, 2020)Accurate knowledge of multiphase flowrates produced by each well in an oil and gas production system is important for performing production optimization, flow assurance and reservoir management. Among the alternatives, ... -
Machine Learning and Image Processing for the Study of Fluid Particle Breakage in Turbulent Flow
(Master thesis, 2020)Hovedformålet med denne oppgaven er å lage maskinlæringsmodeller for bruk i en allerede eksisterende bildeanalysekode for å kunne spore oljedråper i en turbulent strøm av vann. I tillegg, har prosjektet som mål å beskrive ... -
Machine Learning Modelling of the Oxidative and Thermal Degradation of Monoethanolamine (MEA)
(Master thesis, 2021)Folketallet i verden vokser, noe som fører til en økning i forbruket av ressurser og utslipp av klimagasser. Som et resultat av dette øker konsentrasjonene av klimagasser i atmosfæren til farlige nivåer, og behovet for ... -
Macro- and micro scale phenomena in gas flotation for produced water treatment- the effect of fluid composition, temperature and pressure
(Doctoral theses at NTNU;2023:369, Doctoral thesis, 2023)Produced water, the primary waste product of the petroleum industry, contains harmful components that must be treated before discharge to the sea or reinjection. The focus of treatment has traditionally been on dispersed ... -
Magnetic Nanoparticles for Extraction of Naphthenic Acids from Model Oil
(Master thesis, 2015)The Master s thesis aims for synthesis of magnetic nanoparticles (MNP), silica-coated magnetic nanoparticles, and their application for extraction of naphthenic acids (NA) from model oil. The present work is a part of a ...