Blar i Institutt for kjemisk prosessteknologi på tidsskrift "Energy & Fuels"
Viser treff 1-20 av 27
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Adsorption of crude oil components at mineral surfaces followed by quartz crystal micro-balance and contact angle measurements: The effect of oil composition, simulated weathering and dispersants
(Journal article; Peer reviewed, 2019)Improved knowledge of interactions between crude oil and solid surfaces is of great importance for understanding oil spill responses as well as oil spill behavior on land and in the near-shore environment. Here, the goal ... -
Aminoalkyl-functionalized pyridines as high cyclic capacity CO2 absorbents
(Journal article; Peer reviewed, 2019)Recent years have witnessed a growing academic interest in development of new CO2 capture solvents to reduce the capture costs. This study focused on nine picolylamines (three commercial and six synthesized) and one ... -
Chemical Additives as Flow Improvers for Waxy Crude Oil and Model Oil: A Critical Review Analyzing Structure–Efficacy Relationships
(Journal article; Peer reviewed, 2022)Waxy crude oil has become a crucial unconventional oil alternative owing to the depleting conventional oil resources. However, ascertaining flow assurance in a waxy crude oil pipeline at low temperatures is challenging due ... -
Combined Influence of High Pressure and High Temperature on the Removal of Crude Oil from Water during Laboratory-Scale Gas Flotation
(Journal article; Peer reviewed, 2023)Produced water (PW) is the major byproduct and the largest waste stream in petroleum production. Handling this water is a major issue in the oil industry. Gas flotation has proven to be an effective topside separation ... -
Comparing C5Pe and Asphaltenes under Temperature and Pressure Reservoir Conditions Using an Acoustic Wave Sensor
(Peer reviewed; Journal article, 2021)A quartz crystal resonator (QCR) was employed to assess the ability of the C5Pe model asphaltene compound to form nanoaggregates in toluene and bigger flocs that adsorb on the QCR surfaces at a higher concentration of ... -
Droplet Crystallization in Water-in-Crude Oil Emulsions: Influence of Salinity and Droplet Size
(Journal article; Peer reviewed, 2017)Ice crystallization in confined spherical geometries is investigated experimentally at ambient pressure conditions. Water-in-crude (w/o) oil emulsions are formed by homogenization of an acidic North Sea crude oil with water ... -
Equilibrium Partitioning of Naphthenic Acid Mixture Part 2: Crude Oil-Extracted Naphthenic Acids
(Journal article; Peer reviewed, 2018)Crude oil naphthenic acids can partition into the water phase during oil production. Variations in production parameters such as temperature, pressure, pH, and water cut affect partitioning. In a previous article, a method ... -
Equilibrium Partitioning of Naphthenic Acid Mixture, Part 1: Commercial Naphthenic Acid Mixture
(Journal article; Peer reviewed, 2018)Crude oil contains naphthenic acids that can partition into water. This phenomenon is a function of several parameters, such as the naphthenic acid composition, pH, and water phase salinity. This article is a continuation ... -
Excess-Methane CO2 Reforming over Reduced KIT-6-Ni-Y Mesoporous Silicas Monitored by In Situ XAS–XRD
(Journal article; Peer reviewed, 2023)Making Europe less dependent on imported fuels requires a long-term strategy. Low-quality natural gas and biogas could be used to mitigate the energy crisis, and excess-methane dry reforming has the potential to upgrade a ... -
Influence of Asphaltenes on Gelation of Tetrameric Acid with Calcium Ion at the Oil/Water Interface under Flow-Model Condition
(Peer reviewed; Journal article, 2020)The first step in calcium naphthenate deposition is supposed to be the formation of an interfacial gel by cross-linking between ARN tetrameric acid and Ca2+. Several aspects of the inhibition of the interfacial gel formation ... -
Influence of Fatty-Alkylamine Amphiphile on the Asphaltene Adsorption/Deposition at the Solid/Liquid Interface under Precipitating Conditions
(Journal article; Peer reviewed, 2018)The ability of a fatty-alkylamine amphiphile to inhibit asphaltene adsorption/deposition, as well as its ability to disperse the asphaltene layers on stainless steel, was studied using a quartz crystal microbalance with ... -
Influence of Measuring Geometry on Rheomalaxis of Macrocrystalline Wax–Oil Gels: Alteration of Breakage Mechanism from Adhesive to Cohesive
(Journal article; Peer reviewed, 2019)Rheological measurement of wax–oil gel breakage is highly susceptible to the phenomenon of adhesive breakage, hindering instrument-scale replication of cohesive breakage processes. Adhesive breakage measurements are ... -
Influence of Microcrystalline Wax on the Properties of Model Wax-Oil Gels
(Journal article; Peer reviewed, 2018)The influence of microcrystalline wax addition upon the rheological properties of model wax-oil gels is investigated. Addition of less than 1 wt % microcrystalline wax to a model oil consisting of 5 wt % macrocrystalline ... -
Influence of the Crude Oil and Water Compositions on the Quality of Synthetic Produced Water
(Journal article; Peer reviewed, 2017)Produced water originates from crude oil production. It is a mixture of organic and inorganic compounds, and its composition is highly oilfield-dependent. The present study was carried out to increase the understanding of ... -
Influence of Wax Inhibitor Molecular Weight on Solution Crystallization and Rheology of Monodisperse Waxes
(Peer reviewed; Journal article, 2021)Molecular weight fractionation via stepwise precipitation or chain scission is performed on four pour point depressant polymers to study the pour point reduction mechanism. An homologous series of model oils is prepared ... -
Interactions between Asphaltenes and a Model Demulsifier in Bulk and at an Interface Studied by Small-Angle Neutron Scattering (SANS) and Neutron Reflectometry
(Peer reviewed; Journal article, 2020)This article describes neutron reflectometry to probe the structure of the asphaltene layer adsorbed onto a hydrophilic silicon surface and the interactions between asphaltenes and a model demulsifier (pluronic). To start ... -
Interactions of Polyaromatic Compounds. Part 1: Nanoaggregation Probed by Electrospray Ionization Mass Spectrometry and Molecular Dynamics Simulation
(Journal article; Peer reviewed, 2017)Nanoaggregation of three synthetic polyaromatic compounds, N-(1-hexylhepyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetracarboxylicbisimide (C5Pe), N-(1-undecyldodecyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetraca ... -
Interactions of Polyaromatic Compounds. Part 2. Flocculation Probed by Dynamic Light Scattering and Molecular Dynamics Simulation
(Journal article; Peer reviewed, 2017)In part 1 of this series of papers, the results of electron spray ionization mass spectrometry (ESI-MS) and molecular dynamics (MD) simulation revealed a close relationship between nanoaggregation of polyaromatic (PA) ... -
Kinetics of Crystallization of Aqueous Droplets in Water-in-Crude Oil Emulsions at Low Temperatures
(Journal article; Peer reviewed, 2018)This study focused on the examination of the isothermal crystallization of aqueous droplets in water-in-crude oil emulsions with water concentrations in the range of 5 to 20 wt %. Experiments were carried out using ... -
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 ...