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Viser treff 1280-1299 av 1783
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Partitioning of surfactants between the water and oil phases and relations to enhanced oil recovery methods
(Master thesis, 2014)The focus in this master thesis has been to investigate how a varying Ca2+/Na+ mole fraction affects the interfacial tension of a surfactant/brine - dodecane/toluene interface. It has also been investigated how the same ... -
Pd3Ag(111) as a Model System for Hydrogen Separation Membranes: Combined Effects of CO Adsorption and Surface Termination on the Activation of Molecular Hydrogen
(Peer reviewed; Journal article, 2020)The co-adsorption of hydrogen and carbon monoxide on Pd3Ag(111) alloy surfaces has been studied as a model system for Pd-Ag alloys in membrane and catalysis applications using periodic density functional theory calculations ... -
Pd3Ag(111) as a Model System for Hydrogen Separation Membranes: Combined Effects of CO Adsorption and Surface Termination on the Activation of Molecular Hydrogen
(Peer reviewed; Journal article, 2020)The co-adsorption of hydrogen and carbon monoxide on Pd3Ag(111) alloy surfaces has been studied as a model system for Pd-Ag alloys in membrane and catalysis applications using periodic density functional theory calculations ... -
Pebax/PEG Grafted CNT Hybrid Membranes for Enhanced CO2/N2 Separation
(Peer reviewed; Journal article, 2019)In the present study, poly(ethylene glycol) (PEG) functionalized carbon nanotubes (CNT-PEG) were used as nanoadditives to fabricate hybrid membranes for enhanced CO2 separation in Pebax 1657 matrix. The resultant membranes ... -
Performance and Robustness of Smith Predictor Control and Comparison with PID Control
(Master thesis, 2013)The performance and robustness of the Smith predictor controller has been tested for first and second order processes with time-delay by comparing with PI and PID control. It was assumed that the performance would obviously ... -
Performance assessment of a packed bed microstructured reactor - heat exchanger for methanol synthesis from syngas
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:205, Doctoral thesis, 2010)About 25% of the world’s proven natural gas reserves are located offshore with no present economic feasibility to be produced, shipped and sold. Utilization of these resources calls for developing new technologies, which ... -
Performance Investigation of Membranes Suitable for Osmotic Membrane Pressure Actuators
(Master thesis, 2014)Polybenzimidazole (PBI) membrane performance having hydrocarbons mixed with the feed water was investigated. Forward osmosis (FO) and pressure retarded osmosis (PRO) experiments were performed with different ratios of ... -
Performance of MAPA promoted tertiary amine systems for CO2 absorption: Influence of alkyl chain length and hydroxyl groups
(Journal article; Peer reviewed, 2017)Absorption and desorption of CO2 into five aqueous tertiary amine solvents and their blends with MAPA were studied using a screening apparatus. Results showed that MAPA significantly enhanced both CO2 absorption rate and ... -
Performance of mixed matrix membranes containing porous two-dimensional (2D) and three-dimensional (3D) fillers for CO2 separation: A review
(Journal article; Peer reviewed, 2018)Application of conventional polymeric membranes in CO2 separation processes are limited by the existing trade-off between permeability and selectivity represented by the renowned upper bound. Addition of porous nanofillers ... -
Performance of Mn-based H2S sorbents in dry, reducing atmosphere – Manganese oxide support effects
(Journal article; Peer reviewed, 2017)High temperature H2S sorbents comprising manganese oxide (15 wt.%) supported on TiO2, ZrO2, CeO2 and Al2O3 were prepared by wet impregnation using Mn(NO3)2·4H2O as Mn precursor. Upon activation in H2, the sorbent performance ... -
Performance of Nanocomposite Membranes Containing 0D to 2D Nanofillers for CO2 Separation: A Review
(Journal article; Peer reviewed, 2018)Membrane technology has the potential to be an eco-friendly and energy-saving solution for the separation of CO2 from different gaseous streams due to the lower cost and the superior manufacturing features. However, the ... -
Personalized medicine for patients with COPD: where are we?
(Journal article; Peer reviewed, 2019)Chronic airflow limitation is the common denominator of patients with chronic obstructive pulmonary disease (COPD). However, it is not possible to predict morbidity and mortality of individual patients based on the degree ... -
Perspectives on the Effect of Water in Cobalt Fischer-Tropsch Synthesis
(Journal article; Peer reviewed, 2017)Water is an inherent component in Fischer–Tropsch synthesis on Co catalysts, and the effect of water is discussed with an emphasis on alumina and aluminates as support materials. Water may affect the selectivity, activity, ... -
A Petlyuk distillation column dynamic analysis: Hysteresis and bifurcations
(Peer reviewed; Journal article, 2020)Thermally coupled distillation columns (TCDC) have proven to be a superior and feasible alternative compared to conventional distillation. However, their inherent system complexity presents optimization and operational ... -
Phase change solvents for postcombustion CO2 capture
(Doctoral theses at NTNU;2018:32, Doctoral thesis, 2018) -
Phase equilibria in polyethylene systems
(Dr.ingeniøravhandling, 0809-103; 2000:47, Doctoral thesis, 2000)The background for this work is a need to better understand the production of high density polythylene (HDPE). HDPE particles grow in a loop slurry reactor, and particle swelling and slurry viscosity are critical parts in ... -
Phase Inversion, Stability and Destabilization of Model and Crude Oil Water-in-Oil Emulsions
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:352, Doctoral thesis, 2014)The demand for crude oils has constantly been increasing forcing the industry to exploit heavier crude oils. These oils are more difficult to produce and transport than classical light oils, this leads the oil industry to ... -
Phosphorus deactivation on co-based catalysts for Fischer-Tropsch
(Peer reviewed; Journal article, 2023)The effect of phosphorus on a cobalt-based catalyst for Fischer-Tropsch Synthesis (FTS) has been investigated. Phosphorus is an impurity present in biomass and, in this work, its deposition on the catalyst during biomass ... -
Photocatalytic H2-production through photo-reforming of hydrocarbons - Synthesis and Photocatalytic appliacation of TiO2 Nanotubes
(Master thesis, 2015)The main purpose of this Project is the study of the photocatalytical process of reforming alcohols in order to produce Hydrogen, using TiO2 nanotubes as a precursor of the catalyst, and Copper as the electron transfer ... -
Physical absorption of carbon dioxide in imidazole-PTSA based deep eutectic solvents
(Peer reviewed; Journal article, 2021)