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Fischer-Tropsch synthesis over an alumina-supported cobalt catalyst in a fixed bed reactor – Effect of process parameters
(Peer reviewed; Journal article, 2020)Fischer-Tropsch synthesis has been investigated over a commercial type cobalt-based catalyst (20 %Co/0.5 %Re/γ-Al2O3) by varying the H2/CO ratio (2.55–1.12), CO conversion (15–75 %), reaction temperature (210 °C, 230 °C), ... -
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 ... -
Fischer-Tropsch synthesis – Influence of aerosol – deposited potassium salts on activity and selectivity of Co based catalysts
(Doctoral theses at NTNU;2018:104, Doctoral thesis, 2018)The effect of potassium salts (K2SO4, KNO3, KCl, K2CO3) on cobalt based Fischer-Tropsch catalysts has been studied experimentally and theoretically. In order to better understand the deactivation effect of potassium species, ... -
Fischer-Tropsch Synthesis: Conversion of Bio-Syngas to Hydrocarbons
(Master thesis, 2019)Dette prosjektet omhandler Fischer-Tropsch syntese over cobolt-baserte katalysatorer. Tolv eksperimenter ble utført i en to-reaktor rigg ved en rekke reaksjonsbetingelser, med formål om å innhente eksperimentell data til ... -
Fischer-Tropsch synthesis: Effect of CO conversion on CH4 and oxygenate selectivities over precipitated Fe-K catalysts
(Journal article; Peer reviewed, 2018)The explanation for CH4 selectivity for iron based Fischer-Tropsch catalysts in the low conversion region (i.e., <50%) remains elusive. In this contribution, the CO conversion effect was carefully examined over four K ... -
Fischer-Tropsch synthesis—Investigation of the deactivation of a Co catalyst by exposure to aerosol particles of potassium salt
(Journal article; Peer reviewed, 2018)The influence of potassium species on a Co based Fischer-Tropsch catalyst was investigated using an aerosol deposition technique. This way of poisoning the catalyst was chosen to simulate the actual potassium behaviour ... -
Fischer-tropsch: Product selectivity-the fingerprint of synthetic fuels
(Journal article; Peer reviewed, 2019)The bulk of the products that were synthesized from Fischer–Tropsch synthesis (FTS) is a wide range (C1–C70+) of hydrocarbons, primarily straight-chained paraffins. Additional hydrocarbon products, which can also be a ... -
Fischer–Tropsch Synthesis at High Conversions on Al2O3-Supported Co Catalysts with Different H2/CO Levels
(Journal article; Peer reviewed, 2017)Fischer-Tropsch experiments with different H2/CO ratios at high CO conversions have been carried out over an alumina-supported 20wt%Co-0.5wt%Re catalyst in a stainless steel fixed-bed reactor at 210 oC and 20 bar and with ... -
FlashRL: A Reinforcement Learning Platform for Flash Games
(Journal article; Peer reviewed, 2017)Reinforcement Learning (RL) is a research area that has blossomed tremendously in recent years and has shown remarkable potential in among others successfully playing computer games. However, there only exists a few game ... -
Flocculants in produced water
(Master thesis, 2020)Produsert vann som det viktigste biproduktet av leting etter olje og gass inneholder høye mengder olje som ikke er trygt for avhending i vannmiljøet. Med det økende behovet for olje og gass over hele kloden, er et av de ... -
Flocculation-on-a-chip: produced water studied by advanced microfluidic methods
(Master thesis, 2020)Produsert vann, bestående av dispergert olje, er et betydelig biprodukt fra oljeproduksjonen. Det er viktig å fjerne den dispergerte oljen fra det produserte vannet før det kan tømmes ut eller reinjiseres, og det produserte ... -
Flow Behaviour of Water-in-North Sea Acidic Crude Oil Emulsions and Preparation of Synthetic Reference Acidic Oils and Their Emulsions
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:259, Doctoral thesis, 2010)Two phase liquid-liquid flow is described as the concurrent flow of two immiscible liquids, encountered widely in the petroleum industry during the production and transportation of oil and water. Good estimations of ... -
Flow Improvers for Heavy Crude Oil Transport in Pipe
(Master thesis, 2014)The transportation of heavy oil is challenging as the oil has high viscosity and heavy components like asphaltenes. By finding an effective flow improver the transporting could be less demanding and more cost effective. ... -
Fluid Particle Coalescence: Film Drainage Modeling Including the Effect of Surface Rheology
(Doctoral theses at NTNU;2021:292, Doctoral thesis, 2021)Coalescence of fluid particles is an important phenomenon that plays a significant role in a wide range of natural and industrial processes. This work focuses on the film drainage models employed in coalescence modeling, ... -
Fluoride Adsorption On Iron Hydroxide Oxide Pricipitates During Zinc Prodcuction
(Master thesis, 2017)In the zinc smelters at Boliden Odda, the zinc is extracted from the purified zinc sulphate solution by electrowinning. If the purified zinc sulphate contains more than 35 mg/L fluoride, the extracted zinc cannot be removed ... -
Fluoride Quantification and Removal from Industrial Process Streams
(Master thesis, 2021)Jern oxyhydroxide har blitt utfelt i en løsning sammen med fluorid i en Mixed-Suspension-Mixed-Product-Removal(MSMPR) Reaktor ved forskjellige temperaturer, oppholdstider og sulfat konsentrasjoner. Temperaturnivåene benyttet ... -
Formation et destruction de NDELA dans des solutions de 30%m de MEA (Monoétha-nolamine) et de 50%m de DEA (Diéthanolamine)
(Journal article; Peer reviewed, 2014)The formation of nitrosodiethanolamine (NDELA) in a lab scale pilot was studied by feeding known amounts of nitrogen oxide and nitrogen dioxide into the gas entering the absorber. In the same pilot, the destruction by ... -
Formation of 5-methylfurfural and 2-acetylfuran from lignocellulosic biomass and by Cr3+-catalyzed dehydration of 6-deoxyhexoses
(Peer reviewed; Journal article, 2022)During autocatalyzed steam explosion of lignocellulose, polysaccharides in the cell wall are hydrolyzed and dehydrated to form various furaldehydes. In addition to furfural, 5-methylfurfural and 2-acetylfuran were identified ... -
Formation of calcium naphthenate in water/oil systems, naphthenic acid chemistry and emulsion stability
(Dr. ingeniøravhandling, 0809-103X; 2002:127, Doctoral thesis, 2002)In recent years the production of crude oils with high amounts of naphthenic acids has increased. Certain problems are related to this type of crudes and a better understanding of the chemistry of the naphthenic acids is ... -
Formation of Hydroxyapatite via Transformation of Amorphous Calcium Phosphate in the Presence of Alginate Additives
(Journal article; Peer reviewed, 2019)Hydroxyapatite (HA) is the primary mineral of vertebral tooth and bone tissue; thus, it is often incorporated into synthetic composite materials designed for hard tissue engineering applications. Understanding the formation ...