Browsing Fakultet for naturvitenskap (NV) by Subject "Industriell kjemi og bioteknologi, Katalyse og petrokjemi"
Now showing items 21-40 of 47
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Investigation of the Yara 58-Y1 nitrous oxide decomposition catalyst
(Master thesis, 2014)The YARA 58-Y1 catalyst is a catalyst developed by YARA for the abatement of nitrous oxide created during nitric acid production. It uses cobalt aluminate (Co2AlO4) as its active phase supported on cerium oxide. The active ... -
Investigations of PdAu membranes and model systems for production of pure hydrogen
(Master thesis, 2015)Hydrogen production from carbon-containing energy sources can capture the CO2 on site, and therefore reduce the contribution to global warming. The only emission when energy is produced through a fuel cell is H2O. Another ... -
Kinetic Study of the Oxychlorination Process
(Master thesis, 2015)The aim of this paper is to investigate the performance and stability of the non-promoted, potassium, cerium and mixed potassium/cerium promoted CuCl2/gamma-Al2O3 during oxychlorination of ethylene using mass spectroscopy ... -
Large-Scale Granulation of CaO-Based Pellets for High-Temperature Carbon Dioxide Capture
(Master thesis, 2018)Abstract Pelletized CaO-based sorbents are made for the use in Moving Bed Carbonate Looping (MBCL) technology capturing CO2 at a low partial pressure of CO2 and high temperature, producing approximately 100% pure CO2. ... -
Microchannel Membrane Reactor for production of pure Hydrogen - Inhibition effects on thin self-supported Pd/Ag membranes
(Master thesis, 2014)Hydrogen gas is one of the most produced gases in the world for industrial purposes, generally produced by methane steam reforming. The demand for clean hydrogen is rising as technology is advancing. Combining a hydrogen ... -
Multifunctional proppants for enhanced oil production from shales
(Master thesis, 2015)The purpose of the work, which has been done during this thesis, has been to give a better basis for future research on the subject. The subject is functionalizing proppants and testing of these functions. The experimental ... -
New catalysts for low-temperature selective catalytic reduction (SCR)
(Master thesis, 2016)Mesoporous alumina with a regular pore structure and high surface area was prepared using a sol-gel method with a structure-guiding surfactant. The typical diameter of the pores were measured to be 4-6 nm, with narrow pore ... -
Nickel and Iron Poisoning of Copper Based Methanol Synthesis Catalysts
(Master thesis, 2015)Discharged methanol synthesis catalysts are known to contain various amounts of nickel and iron. The purpose of this master thesis was to study nickel and iron poisoning of commercial copper based methanol synthesis catalysts ... -
Nickel Cobalt Catalyst for Methane Abatement in Marine Machinery
(Master thesis, 2017)Natural gas vehicles (NGVs) have been suggested as an alternative to conventional vehicles in the marine sector, in order to reduce the large contribution this sector provides to greenhouse gas emissions. Natural gas has ... -
Nitrogen-Doped Carbon Nanofibers as Pt-Free Catalyst in the Oxygen Reduction Reaction - A study of iron nanoparticles as N-CNF catalyst on different supports
(Master thesis, 2015)A new approach was tested as nitrogen-doped carbon nanofibers (N-CNFs) were synthesized by using uniformly sized iron nanoparticles (FeNPs) on two different support as their growth catalyst. The N-CNFs are designed as a ... -
NO oxidation catalyzed by high surface area perovskites
(Master thesis, 2018)The production of nitric acid is crucial for the production of fertilizer which is necessary to meet the world s demand for food. NO oxidation is one of three chemical steps in the nitric acid production, also called the ... -
Operando FTIR study of the NH3-SCR reaction over Cu/Al2O3 and Fe/Al2O3 catalysts
(Master thesis, 2018)The aim of this thesis was to perform an operando study of the NH3-SCR reaction using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and Mass Spectrometry (MS). The experiments were performed in a ... -
Oxidation of Methanol to Formaldehyde over Ag - Kinetic Modelling of Gas Phase Reactions using COMSOL Multiphysics
(Master thesis, 2017)In this master thesis the goal was to create two COMSOL Multiphysics simulation models, one representing the laboratory scaled reactor and the other representing the industrial scale reactor, to study gas phase reactions ... -
Oxidation of methanol to formaldehyde over Ag catalyst - A study of reaction pathways and Ag catalyst restructuring during MTF
(Master thesis, 2018)Formaldehyde is recognised as an important industrial chemical, being a versatile organic molecule. Due to high reactivity, it is used as a building block to synthesise other chemicals and industrial products. Production ... -
Pressurized Reduction of Cu-ZnO Water-Gas Shift Catalysts in Presence of Water
(Master thesis, 2015)CuO/ZnO/Al2O3 is a commonly used catalyst for the commercialized water gas shift reaction. Prior to industrial use, CuO has to be reduced to the active metallic copper phase. Yara has experienced major issues as a consequence ... -
Reduction of Cu-ZnO water-gas shift catalysts in presence of water
(Master thesis, 2016)Cu/ZnO/Al2O3 catalysts are used to catalyze the low temperature water-gas shift (WGS) step in the ammonia synthesis process. Deactivation of the catalyst due to low mechanical strength has been experienced by Yara, which ... -
Rhodium doped strontium titanate for photocatalytic hydrogen evolution with carbon quantum dots
(Master thesis, 2018)The worlds energy demands continue to increase, and the reserves of fossil fuels are limited. Therefore the world is in need of finding different energy sources. Production of hydrogen by splitting water, using photocatalysis ... -
Sorbents for Sulfur Removal From Biomass-derived Syngas
(Master thesis, 2018)The rising concern of global warming and emission of greenhouse gases have increased the demand for sustainable resources. Biomass is carbon neutral and a renewable energy source, thus a promising alternative to produce ... -
Study of a Graphite Sensor for Alumina Concentration Measurements in Cryolite Melts
(Master thesis, 2018)Alumina dissolution is one of the most crucial processes taking place in the Hall-Héroult process for the production of primary aluminium. One of the key issues for advanced aluminium electrolysis is therefore to understand ... -
Study of Desorption of Asphaltene from Solid Surface by Use of Solvents and Chemicals
(Master thesis, 2015)A study of adsorption and desorption of asphaltene on a stainless steel surface was preformed. A quartz crystal microbalance (QCM) was used for the the study. Different solvents were tested for their ability to desorb ...