Browsing Fakultet for naturvitenskap (NV) by Subject "TECHNOLOGY: Chemical engineering"
Now showing items 1-20 of 21
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Absorption of Carbon Dioxide - Modeling and Experimental Characterization
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:16, Doctoral thesis, 2004)Recent studies on the costs of different processes for CO2 capture from power plants show that post-combustion CO2 removal by absorption with chemical solvents has the potential to remain the most important process also ... -
Colloidal Wood Resin: Analyses and Interactions
(Dr. ingeniøravhandling, 0809-103X; 2003:63, Doctoral thesis, 2003)This thesis presents studies of the interactions between suspended particles and dissolved and colloidal substances (DCS) in process water. The main focus has been to determine if colloidal wood resin is adsorbed by suspended ... -
Control of Fuel Cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:65, Doctoral thesis, 2007)This thesis deals with control of fuel cells, focusing on high-temperature proton-exchange-membrane fuel cells. Fuel cells are devices that convert the chemical energy of hydrogen, methanol or other chemical compounds ... -
Controllability analysis for process and control system design
(Dr. ingeniøravhandling, 0809-103X; 2003:76, Doctoral thesis, 2003)Controllability is the ability of a process to achieve acceptable performance, and in this thesis we use controllability analysis in the design of buffer tanks, feedforward controllers, and multivariable controllers such ... -
Degradation- and Passage Kinetics of Concentrate Particles and Solubles in the Rumen
(Dr.ingeniøravhandling, 0809-103X; 2001:107, Doctoral thesis, 2001)This thesis deals with three actual issues of ruminant degradation and escape of dietary components: One of the main emphasis has been on how particle size distribution of concentrated feed affects the degradation and ... -
Description of Supercritical Water-Hydrocarbon Systems
(Dr. ingeniøravhandling, 0809-103X; 2001:53, Doctoral thesis, 2001)Water +n-alkane systems at high pressures and temperatures, including the critical region, have been studied and modeled. All fluids exhibit fascinating behaviour near the critical point. Thus, the thesis begins with a ... -
Development and modification of glass membranes for aggreessive gas separations
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:24, Doctoral thesis, 2005)Chlorine as a chemical is widespread in industry and found in a great variety of processes ranging from water purification to plastic production. In this thesis, a magnesium production factory was chosen as an example ... -
Growth and Aggregation Phenomena in Precipitation of Calcium Carbonate
(Dr. ingeniøravhandling, 0809-103X; 2001:49, Doctoral thesis, 2001)Particle size-enlargement processes in precipitation of calcium carbonate have been investigated by focusing on determination of crystal growth rates and aggregation rates of the metastable polymorph vaterite. This was ... -
Kinetic and Deactivation Studies of Hydrodesulfurization Catalysts
(Dr. ingeniøravhandling, 0809-103X; 2002:148, Doctoral thesis, 2002)Hydrodesulfurization is an important part of the hydrotreating process. More stringent regulations on the quality of fuels bring new requirements to the catalytic processes. The removal of sulfur has become a key issue in ... -
Mass Transport and Kinetic Phenomena in Catalytic Polymerization of Olefins
(Dr. ingeniøravhandling, 0809-103X; 2001:32, Doctoral thesis, 2001) -
Migration of Plasticizers from Flexible Poly/(Vinyl Chloride)
(Dr. ingeniøravhandling, 0809-103X; 2002:117, Doctoral thesis, 2002)The migration of plasticizers from flexible PVC products has caused raising concern over the last decades. Phthalates are shown to induce certain types of cancer and damages to the reproductive system in rodents. It is ... -
Minimum Energy Requirements in Complex Distillation Arrangements
(Dr. ingeniøravhandling, 0809-103X; 2001:43, Doctoral thesis, 2001)Distillation is the most widely used industrial separation technology and distillation units are responsible for a significant part of the total heat consumption in the world’s process industry. In this work we focus on ... -
Modeling and Experimental Study of Carbon Dioxide Absorption in a Membrane Contactor
(Dr. ingeniøravhandling, 0809-103X; 2003:27, Doctoral thesis, 2003)Membrane gas absorption is a new way of contacting gas and liquid for industrial scale gas purification and offers significant advantages compared to conventional absorption towers. Due to the separation of the phases by ... -
Operation and feasibility of batch hetero-azeotropic distillation
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:47, Doctoral thesis, 2004)Separation of azeotropic mixtures is of great industrial importance and distillation is the dominating unit operation for such separations. However, the presence of azeotropes and non-idealities in the phase behaviour of ... -
Ozone based ECF bleaching of softwood kraft pulp
(Dr. ingeniøravhandling, 0809-103X; 2000:98, Doctoral thesis, 2000)The objective of this work was to explore fundamental aspects of utilizing (DZ) and (ZD) bleaching stages in the prebleaching of oxygen delignified Scandinavian softwood kraft pulp, and compare paper properties of fully ... -
Preparation and Characterization of Nanosized Structures with Applications in Bioscience and Materials
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:82, Doctoral thesis, 2004)The so-called bottom-up approach to the fabrication of nanostructures from stable building blocks has become a popular theme in current science and engineering. This construction principle mimics e.g. biological systems ... -
Process Integration Applied to the Design and Operation of Distillation Columns
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:24, Doctoral thesis, 2004)Process integration of distillation columns with focus on multi-effect distillation is studied in this thesis. Columns are integrated by using different pressures, so that the condensing duty of one column can be used to ... -
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 ... -
Sorption-enhanced steam methane reforming in fluidized bed reactors
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:116, Doctoral thesis, 2006)Hydrogen is considered to be an important potential energy carrier; however, its advantages are unlikely to be realized unless efficient means can be found to produce it without generation of CO2. Sorption-enhanced steam ... -
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 ...