Institutt for kjemisk prosessteknologi
Recent Submissions
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Rheological Properties of Gels Formed at the Oil−Water Interface by the Reaction between Tetrameric Acid and Calcium Ion under Flow Conditions and at the Batch Scale
(Journal article; Peer reviewed, 2019)The interfacial reaction between ARN tetrameric acid and Ca2+, which leads to the formation of calcium naphthenate deposits, was studied using a coaxial capillary device fitted to a profile analysis tensiometer. This device ... -
Investigating opportunities for water-lean solvents in CO2 capture: VLE and heat of absorption in water-lean solvents containing MEA
(Journal article; Peer reviewed, 2020)A thorough investigation on a set of organic diluents for water-lean solvent formulation has been carried in this work. The performance of aqueous monoethanolamine (MEA) 30 %w/w has been compared to that of mixtures between ... -
Using a neural network for estimating plant gradients in real-time optimization with modifier adaptation
(Journal article; Peer reviewed, 2019)In the presence of structural plant-model mismatch, standard real-time optimization (RTO) schemes are prone to compute an operation point that does not coincide with the plant optimum. Modifier Adaptation (MA) methods are ... -
Influence of substitution of water by organic solvents in amine solutions on absorption of CO2
(Journal article; Peer reviewed, 2018)Aqueous amine solutions are the most used solvents for chemical absorption of CO2. Substituting part of the water by organic solvents in aqueous amine solutions aims to take advantage of the lower partial pressure and ... -
Investigation of C1+C1 coupling reactions in cobalt-catalyzed Fischer-Tropsch synthesis by a combined DFT and kinetic isotope study
(Journal article; Peer reviewed, 2019)Understanding the chain growth mechanism is of vital importance for the development of catalysts with enhanced selectivity towards long-chain products in cobalt-catalyzed Fischer-Tropsch synthesis. Herein, we discriminate ... -
The application of pulse field gradient (PFG) NMR methods to characterize the efficiency of separation of water-in-crude oil emulsions
(Journal article; Peer reviewed, 2018)Demulsification of water-in-crude oil emulsions is an essential and sometimes challenging procedure for crude oil processing facilities. Pulse field gradient (PFG) NMR techniques are known to monitor the dynamics of emulsion ... -
Influence of wax inhibitor molecular weight: Fractionation and effect on crystallization of polydisperse waxes
(Journal article; Peer reviewed, 2019)The influence of wax inhibitor molecular weight on wax crystallization was investigated in three steps: (1) Wax inhibitor fractionation via stepwise precipitation or ultrasonic disintegration, (2) characterization of ... -
Screening Cellulose Spinning Parameters for Fabrication of Novel Carbon Hollow Fiber Membranes for Gas Separation
(Journal article; Peer reviewed, 2019)Novel carbon hollow fiber membranes (CHFMs) have been, for the first time, prepared from cellulose precursors directly spun with a cellulose/(1-ethyl-3-methylimidazolium acetate (EmimAc) + dimethyl sulfoxide (DMSO)) system. ... -
Mechanical properties of cellulose nanofibril films: effects of crystallinity and its modification by treatment with liquid anhydrous ammonia
(Journal article; Peer reviewed, 2019)The influence of cellulose crystallinity on mechanical properties of cellulose nano-fibrils (CNF) was investigated. Degree of crystallinity (DoC) was modified using liquid anhydrous ammonia. Such treatment changes crystal ... -
Mathematical Modeling and Process Parametric Study of CO2 Removal from Natural Gas by Hollow Fiber Membranes
(Journal article; Peer reviewed, 2019)Hollow fiber membranes show a great potential in natural gas sweetening by removing CO2 to meet gas grid specifications. A membrane model with high prediction accuracy is developed to model multicomponent gas transport ... -
Interfacial properties pertinent to W/O and O/W emulsion systems prepared using polyaromatic compounds
(Journal article; Peer reviewed, 2019)Establishing interfacial science to understand molecular mechanisms of stabilizing water in heavy crude oil (W/O) emulsions is challenging due to non-transparent nature of crude oil even in diluted systems, as most of the ... -
Lagrangian modeling of mass transfer from a single bubble rising in stagnant liquid
(Journal article; Peer reviewed, 2018)A Lagrangian model has been derived that describes the size, species composition and velocity of an individual gas bubble as it ascends through a vertical column with stagnant liquid and exchanges mass with the other phase. ... -
Enhancing efficiency and economy of phosphorus recovery process by customizing the product based on sidestream characteristics
(Journal article; Peer reviewed, 2019)The enhanced biological phosphorus removal process makes the phosphorus recovery feasible from the dewatering streams of biological sludge. The physicochemical properties of these sidestreams, as an input to a crystallizer, ... -
Methodology to calculate interfacial tension under electric field using pendent drop profile analysis
(Journal article; Peer reviewed, 2019)In this paper, we present a methodology to calculate interfacial tension of a water–oil interface under an electric field. The Young–Laplace equation, conventionally used to estimate surface/interfacial tension in axisymmetric ... -
Experimental investigation of inlet vane design and performance in hydrocarbon systems
(Journal article; Peer reviewed, 2019)Separation efficiencies for a scrubber inlet vane section was investigated using a natural gas hydrocarbon system at 20, 50 and 85 bars. Several design features were investigated such as diameter of inlet pipe, vane design, ... -
Conceptual Design of a Once‐Through Gas‐to‐Liquid Process Combined with Ammonia Synthesis
(Journal article; Peer reviewed, 2018)Recently, a new process has been proposed for a once‐through gas‐to‐liquid (GTL) plant suitable for offshore applications. Here, cogeneration of ammonia is suggested. This is firstly because the main ingredients for ammonia ... -
Biomimetic material functionalized mixed matrix membranes for enhanced carbon dioxide capture
(Journal article; Peer reviewed, 2018)Carbonic anhydrase (CA) has been widely used in gas separation membranes because of its high affinity for CO2 molecules. In this work, a novel biomimetic material (Co-2,6-bis(2-benzimidazolyl)pyridine, CoBBP) which has a ... -
Coke Formation on Pt–Sn/Al2O3 Catalyst for Propane Dehydrogenation
(Journal article; Peer reviewed, 2018)Catalyst deactivation by coking is one major problem for propane dehydrogenation (PDH). To develop catalysts with high resistance to coke, the analysis of coke becomes essential. In this work, an analysis procedure is ... -
The potential of TEMPO-oxidized cellulose nanofibrils as rheology modifiers in food systems
(Journal article; Peer reviewed, 2019)Cellulose nanofibrils (CNFs) have been proposed for use in low-fat food products due to their availability and excellent viscosifying and gel forming abilities. As the CNFs are negatively charged, the presence of other ... -
The Salting-out Effect in Some Physical Absorbents for CO2 Capture
(Journal article; Peer reviewed, 2018)The solubility of CO2 in organic solvents N-methyl-2-pyrrolidone (NMP), methanol and monoethylene glycol (MEG) at 30 °C was measured together with its heat of absorption. The salts lithium nitrate (LiNO3), lithium chloride ...
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