Browsing Institutt for kjemisk prosessteknologi by Issue Date
Now showing items 41-60 of 1850
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Fischer-Tropsch synthesis over cobalt supported catalysts
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:134, Doctoral thesis, 2005)The following catalysts have been studied by different characterization techniques and by kinetic experiments at FT conditions: 12 % Co/γ-Al2O3, 12 % Co - 0.5 % Re/γ-Al2O3, 12 % Co/SiO2, 12 % Co - 0.5 % Re/SiO2, 12 % Co/TiO2 ... -
Studies on selection of controlled variables
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:91, Doctoral thesis, 2005)Increased competition in the process industries requires optimal operation and better utilization of raw materials and energy. One strategy for achieving improved production is to use real-time optimization (RTO), based ... -
Interfacial (o/w) Properties of Naphthenic Acids and Metal Naphthenates, Naphthenic Acid Characterization and Metal Naphthenate Inhibition
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:119, Doctoral thesis, 2005)Deposition of metal naphthenates in process facilities is becoming a huge problem for petroleum companies producing highly acidic crudes. In this thesis, the main focus has been towards the oil-water (o/w) interfacial ... -
Steam Reforming of Methane on Different Nickel Catalysts
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:46, Doctoral thesis, 2005)The effect of crystal size on carbon formation and sintering was studied on nickel catalysts at steam reforming conditions. Different nickel supported catalysts were examined. As support three commercial hydrotalcites were ... -
Selection and Characterization of New Absorbents for Carbon Dioxide Capture
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:156, Doctoral thesis, 2005)Removal of acidic gases, in particular CO2, is an important industrial operation. Carbon dioxide is produced in large quantities by fossil–fuel–fired power plants, steel production, the production of petrochemicals, cement ... -
Stabilizing control and controllability. Control solutions to avoid slug flow in pipeline-riser systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:97, Doctoral thesis, 2005)Riser slugging is a flow regime that can occur in multiphase pipeline-riser systems, and is characterized by severe flow and pressure oscillations. The irregular flow caused by riser slugging can cause large operational ... -
Synthesis of Carbon Nanofibers and Carbon Nanotubes
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:18, Doctoral thesis, 2005)Carbon nanofibers (CNFs) and carbon nanotubes (CNTs) have attracted intense research efforts with the expectation that these materials may have many unique properties and potential applications. The most promising way for ... -
Microstructured reactors for hydrogen production
(Doktoravhandlinger ved NTNU, 1503-8181, Doctoral thesis, 2005)Small scale hydrogen production by partial oxidation (POX) and oxidative steam reforming (OSR) have been studied over Rh-impregnated microchannel Fecralloy reactors and alumina foams. Trying to establish whether metallic ... -
Gas Heated Steam Reformer Modelling
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:77, Doctoral thesis, 2006)Conversion of natural gas is becoming increasingly relevant in the future as the world energy market will demand cleaner fuels, cleaner production of fuels and better utilization of the large, remote, and still undiscovered ... -
Rheological Properties of Oil in Water Emulsions and Particulate Suspensions
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:176, Doctoral thesis, 2006)This thesis aims at a better understanding of the rheologicalproperties of the important colloids in oil industry, i.e. suspensions, emulsions and waxes. The rheology of suspension system is a complex field influenced by ... -
Minimum Energy for the four-product Kaibel-column
(Lecture, 2006) -
Process modelling on a canonical basis
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:71, Doctoral thesis, 2006)Based on an equation oriented solving strategy, this thesis investigates a new approach to process modelling. Homogeneous thermodynamic state functions represent consistent mathematical models of thermodynamic properties. ... -
Aggregation, interfacial properties and structural characteristics of asphaltene solubility fractions
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:158, Doctoral thesis, 2007)Crude oil is the primary source for energy in the world and serves as the raw material for many daily products. Two topics, important in the daily processing of crude oils, are treated in this thesis. Water-in-oil emulsions ... -
Solar material protection factor (SMPF) and solar skin protection factor (SSPF) for window panes and other glass sructures in buildings
(Journal article; Peer reviewed, 2007)The two quantities solar material protection factor (SMPF) and solar skin protection factor (SSPF) are introduced in order to measure and calculate the capability of glass to protect indoor materials and human skin from ... -
Role of Alumina Support in Cobalt Fischer-Tropsch Synthesis
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:56, Doctoral thesis, 2007) -
CO2 Acceptors for Sorption- Enhanced Steam Methane Reforming
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:130, Doctoral thesis, 2007)Sorption-enhanced steam methane reforming (SESMR) is an emerging technology for H2 production from fossil fuels with CO2 capture. The aim of the present work has been to study SESMR with a multiscale approach and to gain ... -
Hydrogen production by catalytic partial oxidation of methane
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:327, Doctoral thesis, 2008)Hydrogen production by catalytic partial oxidation of natural gas was investigated using tools ranging from theoretical calculations to experimental work and sophisticated characterization techniques. Catalytic partial ... -
Crosslinking and Stabilization of High Free Volume Polymers for Gas Separations
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:189, Doctoral thesis, 2008) -
Computer Realization of Thermodynamic Models Using Algebraic Objects
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:323, Doctoral thesis, 2008)The main focus of this thesis is to make thermodynamic models available for different computer programs on Windows, Linux and Unix computer platforms. In thermodynamic calculations, like phase or reaction equilibrium, the ... -
Oxidative dehydrogenation of ethane at short contact times
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:188, Doctoral thesis, 2008)