Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 781-800 of 1784
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Influence of Fatty-Alkylamine Amphiphile on the Asphaltene Adsorption/Deposition at the Solid/Liquid Interface under Precipitating Conditions
(Journal article; Peer reviewed, 2018)The ability of a fatty-alkylamine amphiphile to inhibit asphaltene adsorption/deposition, as well as its ability to disperse the asphaltene layers on stainless steel, was studied using a quartz crystal microbalance with ... -
Influence of Feed Rate on Temperature Controllers in Multicomponent Distillation Columns (in cooperation with Statoil/Gassco at Kårstø)
(Master thesis, 2012)In this thesis two simulation programs were compared, Unisim and D-spice. This was done by creating a model of three columns in series in Unisim and comparing the dynamic behavior of these models with the models in D-spice. ... -
Influence of Functionalized Nanoparticles on the CO2/N2 Separation Properties of PVA-based Gas Separation Membranes
(Journal article; Peer reviewed, 2017)This work investigated the influence of amino-functionalized polyhedral oligomeric silsesquioxane (amine-POSS®) nanoparticles dispersed in a polyvinyl alcohol (PVA) matrix applied as a CO2-selective gas separation membrane. ... -
Influence of HPAM on W/O emulsion separation properties
(Journal article; Peer reviewed, 2017)The present study reports on the influence of partially hydrolyzed polyacrylamide (HPAM) on essential w/o emulsion properties. The characterization has been undertaken with low field NMR to follow droplet sizes and ... -
Influence of Inorganic Nanoparticles on Drug Release from Stimuli-Responsive Nanogels
(Master thesis, 2023)Målrettet medisinering er et lovende alternativ til systemisk kreftbehandling, som har potensiale til å øke den terapeutiske effekten og redusere bivirkninger. Stimuli-responsive nanogeler som er inkorporert med uorganiske ... -
Influence of Measuring Geometry on Rheomalaxis of Macrocrystalline Wax–Oil Gels: Alteration of Breakage Mechanism from Adhesive to Cohesive
(Journal article; Peer reviewed, 2019)Rheological measurement of wax–oil gel breakage is highly susceptible to the phenomenon of adhesive breakage, hindering instrument-scale replication of cohesive breakage processes. Adhesive breakage measurements are ... -
Influence of Microcrystalline Wax on the Properties of Model Wax-Oil Gels
(Journal article; Peer reviewed, 2018)The influence of microcrystalline wax addition upon the rheological properties of model wax-oil gels is investigated. Addition of less than 1 wt % microcrystalline wax to a model oil consisting of 5 wt % macrocrystalline ... -
Influence of moisture on the performance of polyethylene coated solid fiberboard and boxes
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:191, Doctoral thesis, 2010)Effects of moisture on the mechanical properties of one commercial solid fiberboard grade and on the compression strength of mill-fabricated transport boxes made from this material were studied. The solid fiberboard (1220 ... -
Influence of pKa on solvent performance of MAPA promoted tertiary amines
(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
(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 ... -
Influence of temperature during pyrolysis of Fe-alginate: Unraveling the pathway towards highly active Fe/C catalysts
(Peer reviewed; Journal article, 2022)Transition metals supported on carbons play an important role in catalysis and energy storage. By pyrolysis of metal alginate, highly active catalysts for the Fischer-Tropsch synthesis (FTS) can be produced. However, the ... -
The influence of temperature on cellulose swelling at constant water density.
(Peer reviewed; Journal article, 2022)We have in this paper investigated how water sorbs to cellulose. We found that both cellulose nanofibril (CNF) and cellulose nanocrystal (CNC) films swell similarly, as they are both mainly composed of cellulose. CNF/CNC ... -
The influence of temperature on cellulose swelling at constant water density
(Peer reviewed; Journal article, 2022)We have in this paper investigated how water sorbs to cellulose. We found that both cellulose nanofibril (CNF) and cellulose nanocrystal (CNC) films swell similarly, as they are both mainly composed of cellulose. CNF/CNC ... -
Influence of the Crude Oil and Water Compositions on the Quality of Synthetic Produced Water
(Journal article; Peer reviewed, 2017)Produced water originates from crude oil production. It is a mixture of organic and inorganic compounds, and its composition is highly oilfield-dependent. The present study was carried out to increase the understanding of ... -
Influence of Wax Inhibitor Molecular Weight on Solution Crystallization and Rheology of Monodisperse Waxes
(Peer reviewed; Journal article, 2021)Molecular weight fractionation via stepwise precipitation or chain scission is performed on four pour point depressant polymers to study the pour point reduction mechanism. An homologous series of model oils is prepared ... -
Influence of wax inhibitor molecular weight: Fractionation and effect on crystallization of polydisperse waxes
(Journal article; Peer reviewed, 2019)The influence of wax inhibitor molecular weight on wax crystallization was investigated in three steps: (1) Wax inhibitor fractionation via stepwise precipitation or ultrasonic disintegration, (2) characterization of ... -
Inhibiting carbon growth at the initial stage of metal dusting corrosion of high temperature alloys
(Doctoral theses at NTNU;2020:212, Doctoral thesis, 2020)Metal dusting corrosion is a high temperature degradation phenomenon affecting Fe-, Ni- and Co- based alloys when exposed to strongly carburizing gases (carbon activity ac > 1) at elevated temperatures (> 400˚C). The alloy ... -
Inhibition of metal dusting corrosion on Fe-based alloy by combined near surface severe plastic deformation (NS-SPD) and thermochemical treatment
(Peer reviewed; Journal article, 2021)Combined NS-SPD and thermochemical treatment has been used to improve the metal dusting corrosion resistance of Incoloy 800. After testing under infinite carbon activity for 20−100 h, carbon was not found in the NS-SPD ... -
Inhibitor-wax interactions and PPD effect on wax crystallization: New approaches for GC/MS and NMR, and comparison with DSC, CPM, and rheometry
(Journal article; Peer reviewed, 2019)Three pour point depressants (PPDs) with different chemistries, and extracted asphaltenes were studied in their influence on wax crystallization in a model system. A new procedure for nuclear magnetic resonance (NMR) was ... -
Inhibitor-Wax Interactions and Wax Crystallization: New Experimental Approaches and Techniques
(Doctoral theses at NTNU;2018:410, Doctoral thesis, 2018)Issues related to wax crystallization are one of the major challenges faced during crude oil production. Wax inhibitors and pour point depressants (PPD) are in common use for wax prevention, as they can delay gelling and ...