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Microcalorimetry on Cu-MCM-22 Reveals Structure-Activity Relationships for the Methane-to-Methanol Reaction
(Peer reviewed; Journal article, 2023)With a stepwise mechanism for direct methane activation to methanol (MTM) over Cu-zeolites, it is possible to produce methanol with high selectivity. With this study, we apply adsorption/desorption experiments with ... -
Microcalorimetry Study of the Adsorption of Asphaltenes and Asphaltene Model Compounds at the Liquid–Solid Surface
(Journal article; Peer reviewed, 2016)The adsorption of an acidic polyaromatic asphaltene model compound (C5PeC11) and indigenous C6-asphaltenes onto the liquid–solid surface is studied. Model compound C5PeC11 exhibits a similar type of adsorption with a plateau ... -
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 ... -
Microfluidic droplet detection via region-based and single-pass convolutional neural networks with comparison to conventional image analysis methodologies.
(Peer reviewed; Journal article, 2022)As the complexity of microfluidic experiments and the associated image data volumes scale, traditional feature extraction approaches begin to struggle at both detection and analysis pipeline throughput. Deep-neural networks ... -
Microfluidic Interfacial Tension
(Master thesis, 2022)En metode for å måle overflatespenning ved hjelp av microfluidics har blitt utviklet. Utviklingen av modellen følger metodikk publisert i litteraturen. En ikke-ionisk surfaktant ble brukt for å manipulere overflatespenning ... -
Microfluidic Investigation of Crude Oil Droplet Coalescence: Effect of Oil/Water Composition and Droplet Aging
(Journal article; Peer reviewed, 2020)The coalescence between crude oil droplets is a major factor influencing the efficiency of most produced water treatment processes. As the droplets grow bigger in size, it is easier to remove them from the continuous water ... -
Microfluidic investigation of enhanced oil recovery: The effect of aqueous floods and network wettability
(Peer reviewed; Journal article, 2021)Rock wettability significantly influences underground oil extraction efficiency during enhanced oil recovery (EOR) processes. We experimentally examine the effect of wettability on oil recovery at pore-scale using ... -
Microfluidic method for determining drop-drop coalescence and contact times in flow
(Peer reviewed; Journal article, 2020)Coalescence kinetics is an important parameter when describing the stability of dispersions. A number of methods to measure coalescence time are available, however they often take long time and do not allow working with ... -
Microfluidic methods for studying oil recovery by aqueous floods at different wettability, temperature and pressure conditions
(Doctoral theses at NTNU;2021:78, Doctoral thesis, 2021)To keep up with the energy consumption in the world and recover sustainably from the currently developed oil fields, enhanced oil recovery (EOR) methods have been proven important. To be able to test the processes and new ... -
A Microfluidic Study of Droplet And Particle Retention: A Path from the Rationale to Pore-Scale Experiments
(Doctoral theses at NTNU;2022:291, Doctoral thesis, 2022)Produced water is the major byproduct of oil and gas production, containing a number of components that can be harmful to the environment, e.g., dispersed particles, dispersed oil, dissolved organics. Re-injection is an ... -
A microfluidic study of oil displacement in porous media at elevated temperature and pressure
(Peer reviewed; Journal article, 2021)Microfluidics methods offer possibilities for visual observations of oil recovery processes. Good control over test parameters also provides the opportunity to conduct tests that simulate representative reservoir conditions. ... -
Microfluidic Study on the Attachment of Crude Oil Droplets to Gas Bubbles
(Journal article; Peer reviewed, 2018)Gas flotation is often used during treatment of the oilfield produced water. It relies on the generation of gas bubbles and their attachment to oil drops, for example, by forming an oil film on the surface of a gas bubble. ... -
Microfluidic Synthesis of Graphene Quantum Dots and the Subsequent Ultrafast Photophysics: Building Blocks Towards Autonomous Nanomaterial Synthesis Platforms
(Doctoral theses at NTNU;2022:60, Doctoral thesis, 2022)Autonomous synthesis of nanomaterials is a harmonious pursuit which assembles various building blocks from a toolbox consisting of microfluidics, robotics, artificial-intelligence, and spectroscopy, amongst a plethora of ... -
Microfluidic testing of flocculants for produced water treatment: Comparison with other methodologies
(Peer reviewed; Journal article, 2020)Flocculants are often added during produced water treatment to improve the crude oil droplet growth and separation from the water phase. Prior to use in the field, their performance is tested in laboratory conditions, ... -
Microfluidic tools for studying coalescence of crude oil droplets in produced water
(Journal article; Peer reviewed, 2018)The major contaminant targeted during the treatment of the oilfield produced water is dispersed oil. The efficiency of most separation processes highly relies on the size of the droplets, which can be increased through ... -
Microscopic Insight to Nonlinear Voltage Dependence of Charge in Carbon-Ionic Liquid Supercapacitors
(Journal article; Peer reviewed, 2021) -
Microstructure Characterisation of Bainitic HSLA Steel for Pressure Vessels
(Master thesis, 2014)The microstructure and mechanical properties in the midsection of a high thickness HSLA bainitic steel, was investigated in this master thesis. A homogeneous microstructure and good mechanical properties can be difficult to ... -
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 ... -
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 ... -
Mineral scaling in natural gas processing – a classical crystallization phenomenon
(Doctoral theses at NTNU;2019:72, Doctoral thesis, 2019)Summary of thesis: Scaling is the formation of mineral deposits on surfaces. During petroleum production, these crystalline layers can affect surfaces everywhere from the well to production equipment onshore. When the ...