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Selective recovery of silver from copper impurities by electrodialysis: Tailoring monovalent selective cation exchange membranes by monomolecular layer deposition
(Peer reviewed; Journal article, 2023)Selective recovery of silver from secondary resources enriched with copper impurities is a well-known challenge but is urgently needed by the industry. This study addresses the challenge by developing a highly efficient ... -
Selective recovery of silver ions from copper-contaminated effluents using electrodialysis
(Journal article; Peer reviewed, 2024)With the growing demand for silver, the recycling of this precious metal from secondary sources has become imperative. However, the presence of copper impurities poses a significant challenge. This study aims to explore ... -
Selective removal of Hydrogen Sulfide from Natural Gas by use of MDEA
(Master thesis, 2013)There have been a lot of investigations on acid gas removal using absorption process in which different types of solvents including physical solvents, chemical solvents and hybrid solvents are used. One of these chemical ... -
Selectively oxygen-functionalized carbon-supported cobalt catalysts for Fischer-Tropsch synthesis
(Master thesis, 2023)Kobolt katalysert Fischer-Tropsch (FT) er en måte å produsere syntetisk drivstoff og kjemikalier fra bærekraftig råmateriale, slik som biomasse og ikke-resirkulerbar plastavfall. Vanlige bærematerialer for FT katalysatorer ... -
Selectivity and self-diffusion of CO2 and H2 in a mixture on a graphite surface
(Journal article; Peer reviewed, 2013)We performed classical molecular dynamics (MD) simulations to understand the mechanism of adsorption from a gas mixture of CO2 and H2 (mole fraction of CO2 = 0.30) and diffusion along a graphite surface, with the aim to ... -
Self Optimizing Control of Recirculated Gas-Lift Problem
(Master thesis, 2023)Olje- og gassindustrien kjennetegnes av komplekse og dynamiske produksjonssystemer som involverer flere brønner, stigerørssystemer, separatorer, kompressorer og andre sammenkoblede komponenter. Disse systemene er underlagt ... -
Self-assembly of a CTAB surfactant on gold nanoparticles: a united-atom molecular dynamics study
(Peer reviewed; Journal article, 2022)Self-assembly of a cetyltrimethyl ammonium bromide (CTAB) surfactant on gold nanoparticles (AuNPs) is studied using united-atom molecular dynamics (MD) simulations. For AuNPs in the size range of 1–3 nm, CTAB self-assembles ... -
Self-Optimizing Control in Chemical Recycle Processes
(Journal article; Peer reviewed, 2018)An engineer always has to make assumptions about the system boundary. In this paper, the impact of neglected dependencies of manipulated variables on the disturbance variables as example for said assumptions is investigated ... -
Self-Optimizing Control of an Offshore Blue Hydrogen Plant
(Master thesis, 2023)Utviklingen av fornybare energikilder øker stadig, men ytterligere fremgang er nødvendig. Oppdagelsen av nye metoder for å produsere miljøvennlig drivstoff og energikilder er avgjørende, med hydrogen som et lovende alternativ. ... -
Self-Optimizing Control Structures for Active Constraint Regions of a Sequence of Distillation Columns
(Master thesis, 2012)Investigating and mapping active constraint regions for processes, and subsequently finding control structures for each region, is vital for their optimal operation. In this work, active constraint regions of three different ... -
Sensitivity enhancement of X-ray absorption spectroscopy applied to Co-based Fischer-Tropsch synthesis catalysts
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:59, Doctoral thesis, 2014)Fischer-Tropsch synthesis is one of the options to produce sulphur-free high quality fuels. This process is of a great interest to researchers because environmental regulations become increasingly stricter. In the present ... -
Sensitivity-Based Economic NMPC with a Path-Following Approach
(Journal article; Peer reviewed, 2017)We present a sensitivity-based predictor-corrector path-following algorithm for fast nonlinear model predictive control (NMPC) and demonstrate it on a large case study with an economic cost function. The path-following ... -
Separation of azeotropic mixtures : tools for analysis and studies on batch distillation operation
(Dr.ingeniøravhandling, 0809-103X; 2000:115, Doctoral thesis, 2000)Separation of azeotropic mixtures is a topic of great practical and industrial interest. Most liquid mixtures of organic components form nonideal systems. The presence of some specific groups, particularly polar groups ... -
Separation of oxygen from air by carbon membranes
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Separation-on-a-chip: coalescence and the influence of demulsifiers in w/o emulsions studied by advanced microfluidic methods
(Master thesis, 2020)Petroleumsindustrien produserer betydelig store mengder vann ved produksjon av olje, og dermed vil oljeemulsjoner være tilstede i reservoarene. Siden emulsjoner er termodynamisk ustabile, kreves det energitilførsel for å ... -
Settling of superparamagnetic silica encapsulated DNA microparticles in river water
(Peer reviewed; Journal article, 2023)Particle tracers are sometimes used to track sources and sinks of riverine particulate and contaminant transport. A potentially new particle tracer is ~200 nm sized superparamagnetic silica encapsulated DNA (SiDNAFe). The ... -
Shape evolution of a water drop in asphaltene solution under weak DC electric fields
(Journal article; Peer reviewed, 2019)The microscopic shape change of a pendent water drop, surrounded by an organic solution containing asphaltenes extracted from heavy crude oil, under electric field is investigated. Weak constant DC electric fields were ... -
Shape Selective Green Synthesis of Silver Nanoparticles
(Master thesis, 2022)Hovedformålet med dette prosjektet var å utvikle en metode for å syntetisere nanopartikler av sølv med kontroll over både partikkelstørrelse og -morfologi, basert på prinsippene fra grønn kjemi. Sølvnanopartikler har mange ... -
Shape selectivity in acidic zeolite catalyzed 2-pentene skeletal isomerization from first principles
(Journal article; Peer reviewed, 2018)Periodic density functional theory (DFT) calculations have been performed to examine the monomolecular reaction mechanism for 2-pentene skeletal isomerization catalyzed by acidic zeolite Beta, Mordenite, and ZSM-5. The use ... -
Should we forget the Smith Predictor?
(Journal article; Peer reviewed, 2019)The PI/PID controller is the most used controller in industry. However, for processes with large time delays, the common belief is that PI and PID controllers have sluggish performance, and that a Smith predictor or similar ...