Blar i Institutt for kjemisk prosessteknologi på tittel
Viser treff 275-294 av 1784
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Coatability of cellulose nanofibril suspensions: Role of rheology and water retention
(Journal article; Peer reviewed, 2017)Cellulose nanofibril (CNF) suspensions are not easily coatable because of their excessively high viscosity and yield stress, even at low solids concentrations. In addition, CNF suspensions vary widely in their properties ... -
Coating 3D Printed Polycaprolactone Scaffolds with Nanocellulose Promotes Growth and Differentiation of Mesenchymal Stem Cells
(Journal article; Peer reviewed, 2018)3D printed polycaprolactone (PCL) has potential as a scaffold for bone tissue engineering, but the hydrophobic surface may hinder optimal cell responses. The surface properties can be improved by coating the scaffold with ... -
Cobalt/Manganese Oxide Nanoparticles for Enhanced Olefin Production in Fischer-Tropsch
(Master thesis, 2015)The Fischer-Tropsch process for the production of fuels and chemicals from alternative carbon containing feedstocks have become of increasing interest in recent years. Special attention towards the the production of light ... -
Coke Formation on Pt–Sn/Al2O3 Catalyst for Propane Dehydrogenation
(Journal article; Peer reviewed, 2018)Catalyst deactivation by coking is one major problem for propane dehydrogenation (PDH). To develop catalysts with high resistance to coke, the analysis of coke becomes essential. In this work, an analysis procedure is ... -
Colloid chemistry and experimental techniques for understanding fundamental behaviour of produced water in oil and gas production
(Journal article; Peer reviewed, 2020)Due to increasing volumes of produced water and environmental concerns related to its discharge, water treatment has become a major challenge during the production of crude oil and natural gas. With continuously stricter ... -
Combination of ionic liquids with membrane technology: a new approach for CO2 separation
(Doctoral thesis at NTNU;2016:91, Doctoral thesis, 2016)The objective of this PhD study is to combine the advantages of membrane and ILs technologies to develop high-performance IL-based membrane contactors and membranes for CO2 separation from various sources. First of all, ... -
Combined Effect of Surfactant Presence and Gas Dissolution on Coalescence in Chemical- and Bioreactors
(Master thesis, 2021)In this work, coalescence of gas bubbles is investigated in the presence of gas dissolution and surfactants through a film drainage model. The study on dissolution is carried out for three cases considering low Pe, constant ... -
Combined Hydrogen Sulfide Removal and Hydrate Control for Subsea Application: Characterization of Selected Blends
(Doctoral theses at NTNU;2020:209, Doctoral thesis, 2020)After more than a century of oil and gas exploration, fewer and fewer easily accessible reservoirs are available. In order to meet the increasing energy demands, the industry has extended its exploration activities in ... -
Combined Influence of High Pressure and High Temperature on the Removal of Crude Oil from Water during Laboratory-Scale Gas Flotation
(Journal article; Peer reviewed, 2023)Produced water (PW) is the major byproduct and the largest waste stream in petroleum production. Handling this water is a major issue in the oil industry. Gas flotation has proven to be an effective topside separation ... -
Combined state and parameter estimation for not fully observable dynamic systems
(Journal article, 2020)In this paper, a simple, yet novel method for state estimation and parameter identification for dynamic systems is presented. Apart from providing estimates of non-measurable state variables, the algorithm is also capable ... -
Combined subsea hydrate control and H2S removal
(Doctoral theses at NTNU;2019:127, Doctoral thesis, 2019)In Norway natural gas production mostly comes from offshore facilities and contains impurities such as acid gases (hydrogen sulfide (H2S) & carbon dioxide (CO2)), water vapor, and mercury, etc. These impurities can cause ... -
Combining Multistage Model Predictive Control with Global Sensitivity Analysis
(Master thesis, 2023)I denne masteravhandlingen var målet å forbedre flerstegs modell prediktiv kontroll (MS-MPC) ved å kombinere det med sensitivitetsanalyse (SA). MS-MPC håndterer usikkerhetene i ett gitt system til større grad enn den vanlige ... -
Comparative analysis of NMPC performance for a semi-batch reactor optimisation problem with uncertain variables using state estimators Extended Kalman Filter and Moving Horizon Estimator
(Master thesis, 2023)Nonlinear model predictive control (NMPC) er en optimaliseringsteknikk hvor hovedmålet er å beregne kontrollhandlinger som forsikrer optimal drift av en pros- ess. Dette gjøres ved å beregne kontrollhandlingsekvenser som ... -
Comparative study of selected catalysts for methane partial oxidation
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:186, Doctoral thesis, 2010)Catalytic partial oxidation of methane (CPO) is an interesting alternative to the conventional steam methane reforming (SMR) for synthesis gas production. The obtained synthesis gas has the proper H2/CO ratio for methanol ... -
Comparative study on the photocatalytic hydrogen producton from methanol over Cu, Pd, Co and Au loaded TiO2
(Peer reviewed; Journal article, 2015)Photocatalytic hydrogen production from a methanol-water solution was investigated in a semi-continuous reactor over different metal-loaded TiO2 catalysts under UltraViolet (UV) light irradiation. The catalysts were mainly ... -
Comparing C5Pe and Asphaltenes under Temperature and Pressure Reservoir Conditions Using an Acoustic Wave Sensor
(Peer reviewed; Journal article, 2021)A quartz crystal resonator (QCR) was employed to assess the ability of the C5Pe model asphaltene compound to form nanoaggregates in toluene and bigger flocs that adsorb on the QCR surfaces at a higher concentration of ... -
Comparison of Accelerated Climate Ageing Methods of Polymer Building Materials by Attenuated Total Reflectance Fourier Transform Infrared Radiation Spectroscopy
(Journal article; Peer reviewed, 2011)The degradation of the polymer building materials polypropylene (PP) and high density polyethylene (HDPE) intended for application as water barriers/repellants around building foundation walls have been studied. The PP and ... -
Comparison of Fresh and Spent Pd/Al2O3 Catalysts for Low Temperature Selective Hydrogenation
(Master thesis, 2021)Karakterisering av to kommersielle Pd/γ-Al2O3 katalysatorer med ulik dispersjon var utført før og etter aktivitetstester. Aktivitetstestene innebar selektiv hydrogenering av et nitroarenderivat for å danne et korresponderende ... -
Comparison of novel olivine supported catalysts for high purity hydrogen production by CO2 sorption enhanced steam reforming
(Peer reviewed; Journal article, 2020)Seven Ni-based catalysts were prepared over different supports (conventional Al2O3, non-conventional olivine and hydrotalcite) with Co and Pd addition. Their catalytic performance was studied in hydrogen production by Steam ... -
Complete Evaluation of Cell Mixing and Hydrodynamic Performance of Thin-Layer Cascade Reactor
(Peer reviewed; Journal article, 2020)Microalgae are a great source of food and supplements as well as a potential source for the production of biofuels. However, the operational cost must be reduced to allow viable productions of bulk chemicals such as biofuels ...