Blar i Institutt for kjemisk prosessteknologi på tittel
Viser treff 1649-1668 av 1765
-
The Fluid Flow Equations in General Curvilinear Coordinates solved with the SIMPLE Algorithm on a Staggered Curvilinear Grid
(Master thesis, 2021)Hovedmålet i denne mastergraden var å modellere strømningene over et bakovervendt steg ved å bruke SIMPLE algoritmen med et forskjøvet ikke-ortogonalt kurvelineært rutenett. SIMPLE ligningene ble løst i det beregnende ... -
The formation and characterization of sustainable layered films incorporating Microfibrillated Cellulose (MFC)
(Journal article; Peer reviewed, 2012)Microfibrillated cellulose (MFC), TEMPO-pretreated MFC, and hybrid polymer/MFC mix were used for the production of layered films with interesting properties for application in food packaging. The series of samples were ... -
The impact of sequential H2-CO-H2 activation treatment on the structure and performance of cobalt based catalysts for the Fischer-Tropsch synthesis
(Journal article; Peer reviewed, 2018)Different activation protocols were applied to a promoted Re/Co/γ-Al2O3 catalyst for Fischer-Tropsch synthesis. The activation included treatment in either pure H2 or a sequence of Reduction (H2) – Carburization (CO) – ... -
The Influence of Differently Shaped Gold Nanoparticles Functionalized with NIPAM-Based Hydrogels on the Release of Cytochrome C
(Journal article; Peer reviewed, 2017)Here, we report the synthesis and functionalization of five different shapes of Au nanoparticles (NPs), namely nanorods, tetrahexahedral, bipyramids, nanomakura, and spheres with PEG and poly (N-isopropylacrylamide)-acrylic ... -
The influence of furnish composition, sheet structure and pressing conditions on wet pressing performance of newsprint
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:59, Doctoral thesis, 2012)The choice of furnish in newsprint production is dictated by the raw material costs, production cost and the final quality demanded by printers. In addition to the raw material costs, energy cost is a major factor in ... -
The Influence of Salts with Different Cation Valency on Oil-in-Water Emulsion Stability
(Master thesis, 2015)The effect of different emulsion preparation parameters on the stability of oil-in-water (o/w) emulsions has been studied by varying the preparation parameters and then observing the emulsion visually. Change in the turbidity ... -
The Least-Squares Spectral Element Method Solution of the Gas-Liquid Multi-fluid Model Coupled with the Population Balance Equation
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:264, Doctoral thesis, 2009)This thesis work concentrates on the modelling of dispersed bubbly flow encountered widely in the chemical, oil & gas and nuclear industries. The computational fluid dynamics (CFD) that provides detailed information of ... -
The potential of TEMPO-oxidized cellulose nanofibrils as rheology modifiers in food systems
(Journal article; Peer reviewed, 2019)Cellulose nanofibrils (CNFs) have been proposed for use in low-fat food products due to their availability and excellent viscosifying and gel forming abilities. As the CNFs are negatively charged, the presence of other ... -
The potential of zero total charge and electrocatalytic properties of Ru@Pt core-shell nanoparticles
(Journal article; Peer reviewed, 2019)Electrocatalysis of the oxygen reduction reaction (ORR), oxidation of carbon monoxide, and the methanol oxidation reaction (MOR) are all critical to the performance of direct-methanol fuel cells (DMFC). In this work we ... -
The relevance of acidic groups and metal ions in the production and end use of super-calendered (SC) magazine paper
(Doctoral thesis at NTNU;2014:283, Doctoral thesis, 2014)In this thesis, clay-induced discolouration of mechanical pulp and the electrostatic properties of supercalendered (SC) magazine paper have been investigated. New knowledge has been established in both areas. It was shown ... -
The role of carbon supports in platinum catalyzed hydrogenation/ dehydrogenation model reactions
(Doctoral thesis at NTNU;2015:221, Doctoral thesis, 2015)giving a higher turnover frequency, the propane dehydrogenation reaction over Pt supported on carbon black was less susceptible to deactivation in experiments without co-fed hydrogen, indicating that the carbon black ... -
The role of H2S addition on Pt/Al2O3 catalyzed propane dehydrogenation: a mechanistic study
(Journal article; Peer reviewed, 2019)Introducing sulfur species into Pt catalysts has been proven to be an effective method to improve their performance in various reactions. However, the role of sulfur addition on Pt catalysts catalyzing propane dehydrogenation ... -
The Salting-out Effect in Some Physical Absorbents for CO2 Capture
(Journal article; Peer reviewed, 2018)The solubility of CO2 in organic solvents N-methyl-2-pyrrolidone (NMP), methanol and monoethylene glycol (MEG) at 30 °C was measured together with its heat of absorption. The salts lithium nitrate (LiNO3), lithium chloride ... -
A theoretical and experimental investigation of batch oil-water gravity separation
(Peer reviewed; Journal article, 2023)Gravity separation of oil-water emulsions is an industrially crucial process. Mechanistic models for a batch separation process can immensely be beneficial by linking emulsion experimental characterization to optimal ... -
Thermal and Rheological Performances Evaluation of a Modified Biopolymer for Fracturing Fluid System
(Journal article; Peer reviewed, 2022)Developing an efficient fracturing fluid system is an enduring hot topic in the petrochemical industries, especially regarding the exploitation of limited oil. Biopolymers, especially polysaccharides (e.g., konjac gum, ... -
Thermal degradation on already oxidatively degraded solutions
(Journal article; Peer reviewed, 2013)CO2 capture with alkanolamines has been in use since 1930, where 2-ethanolamine (MEA) is the most studied absorbent for post-combustion. In order to prevent degradation, it is important to understand the degradation ... -
Thermal degradation study by continuous thermal stability rig
(Master thesis, 2013)This investigation was done at NTNU and together with Statoil research and development department in Rotvoll, Trondheim to facilitate a new semi dynamic amine thermal degradation rig.This study was an initial attempt to ... -
Thermal oxidation of polyolefins by mild pro-oxidant additives based on iron carboxylates and lipophilic amines: Degradability in the absence of light and effect on the adhesion to paperboard
(Journal article; Peer reviewed, 2015)Marine and inland pollution by non-degradable plastic bags and other plastic articles is a topic of great concern. Natural degradation processes based on oxidation of plastic pollutants could possibly contribute to limit ... -
Thermal stability and corrosion of tertiary amines in aqueous amine and amine-glycol-water solutions for combined acid gas and water removal
(Journal article; Peer reviewed, 2018)Thermal stability and corrosion of seven tertiary amines (20 wt.%) solutions in water and water-glycol [ethylene glycol (MEG)/tri-ethylene glycol (TEG)] loaded with CO2 in stainless steel reactors has been studied for ... -
Thermo-Fluidic Characteristics of Two-Phase Ice Slurry Flows Based on Comparative Numerical Methods
(Journal article; Peer reviewed, 2019)Ice slurry is a potential secondary refrigerant for commercial refrigeration systems because of its remarkable thermal properties. It is necessary to optimize the heat transfer process of ice slurry to reduce the energy ...