Browsing Institutt for kjemisk prosessteknologi by Title
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Nafion/IL hybrid membranes with tuned nanostructure for enhanced CO2 separation: effects of ionic liquid and water vapor
(Journal article; Peer reviewed, 2018)Polyelectrolytes have been reported to display gas permeation properties that can be of significant interest for CO2 capture applications, especially when they are fully hydrated. In this work, hybrid membranes prepared ... -
Nafion/PEG hybrid membrane for CO 2 separation: Effect of PEG on membrane micro-structure and performance
(Journal article; Peer reviewed, 2018)In the present work, PEGDME with different molecular weight (Mn ∼ 250 and 500 g/mol) was added into Nafion-based membranes as CO2-philic additive, aiming at improving their CO2 capture performance. The physical, chemical ... -
Nanocellulose Crystal-Enhanced Hybrid Membrane for CO2 Capture
(Peer reviewed; Journal article, 2022)Developing a membrane material with both high CO2 permeability and high CO2/N2 selectivity is always desired for CO2 capture, while improving the sustainability of the membrane preparation process is of equal importance. ... -
Nanocellulose-enriched hydrocolloid-based hydrogels designed using a Ca2+ free strategy based on citric acid
(Peer reviewed; Journal article, 2021)In this work fully biomass-based hydrogels were developed using a naturally occurring vegetable hydrocolloid co-mingled with wood-derived nanocellulose fibrils. Two distinct types of hydrocolloids have been considered: a ... -
Nanocomposite Membranes containing Bio-nanofibers and Mimic Enzyme for Biogas upgrading
(Doctoral theses at NTNU;2018:64, Doctoral thesis, 2018)CO2 is the most dominating anthropogenic greenhouse gas. Combustion of fossil fuels, to meet energy demands is one of the major sources of CO2 emission. Release of CO2 from burning fossil fuel and cement industry has ... -
Nanocomposite membranes with high-charge and size-screened phosphorylated nanocellulose fibrils for CO2 separation
(Peer reviewed; Journal article, 2020)In this study, cellulose nanofibrils (CNF) of high charge (H-P-CNF) and screened size (H-P-CNF-S) were fabricated by increasing the charge of phosphorylated cellulose nanofibrils (P-CNFs) during the pre-treatment step of ... -
Nanomaterials Enhanced Membranes for Carbon Capture
(Doctoral theses at NTNU;2020:253, Doctoral thesis, 2020)Alarming increase in global CO2 emissions has led to climate change. An acceleration in the development of CO2 capture technologies is therefore necessary to facilitate the large-scale implementation of Carbon Capture and ... -
Nanoparticle-stabilized microbubbles for multimodal imaging and drug delivery
(Journal article, 2015)Microbubbles (MBs) are routinely used as contrast agents for ultrasound imaging. The use of ultrasound in combination with MBs has also attracted attention as a method to enhance drug delivery. We have developed a technology ... -
Nanosized Cellulose Fibrils as Stabilizer of Emulsions
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:7, Doctoral thesis, 2011)Pickering emulsions have been a subject of research for many years due to their practical applications not only in everyday life products but also in industry. The stability of these emulsions is due to the irreversible ... -
Nanostructural Analysis of Co-Re/γ-Al2O3 Fischer-Tropsch Catalyst by TEM and XRD
(Journal article; Peer reviewed, 2022)A rhenium promoted Fischer-Tropsch (FT) cobalt catalyst supported on γ-Al2O3 has been investigated by Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD), before and after reduction. Electron diffraction, ... -
Naphthenic acid solubility in produced water and their interactions with divalent cations
(Doctoral theses at NTNU;2018:259, Doctoral thesis, 2018)To keep up with the growing energy demands, the production of high acid crudes is increasing worldwide. This acidity is mainly caused by a subgroup of resins called naphthenic acids. With the increased production and ... -
Natural Gas Dehydration Using Membrane Contactor
(Master thesis, 2022)Natural gas is the cleanest and most preferred energy source due to its high accessibility, low cost, and energy efficiency. Subsea processing aims for underwater natural gas purification at high pressures, enabling the ... -
Dynamic simulationon a thermodynamic canonical basis
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:132, Doctoral thesis, 2010)In this thesis a general approach is outlined for the modeling and simulation of dynamic processes involving phase and reaction equilibria. A new methodology is presented that exploits the intrinsic structure of thermodynamic ... -
Neural Network Programming: Integrating First Principles into Machine Learning Models
(Doctoral theses at NTNU;2022:193, Doctoral thesis, 2022)Tired of borrowing the machine learning models proposed by computer scientists? This thesis proposes a new perspective, ideas, and methods to formulate hybrid models through the manipulation of the Artificial Neural Network ... -
New and Innovative Conceptual Designs of Gas-to-Liquid Processes
(Doctoral theses at NTNU;2017:205, Doctoral thesis, 2017)The research is about a chemical process, which turns natural gas into liquid fuel through chemical reactions, and it is called Gas-to-Liquid (GTL) process. The produced liquid fuel is a replacement for liquid fuel derived ... -
A new approach to analyze the equilibrium and transient behaviors of particulate systems and the subsequent application to multiphase fluid systems
(Journal article; Peer reviewed, 2022) -
New catalysts for low-temperature selective catalytic reduction (SCR)
(Master thesis, 2016)Mesoporous alumina with a regular pore structure and high surface area was prepared using a sol-gel method with a structure-guiding surfactant. The typical diameter of the pores were measured to be 4-6 nm, with narrow pore ... -
A new facility for viscosity and density measurements for CO2 – rich mixtures relevant for CO2 transport and storage
(Journal article, 2022)For safe and cost-effective design, optimization, and operation of CO2 capture, transport, and storage (CCS) processes, accurate viscosity and density data of CO2-rich mixtures are required. Currently, there are large ... -
A new facility for viscosity measurements of CO2-rich mixtures at conditions relevant to CO2 capture, transport and storage
(Doctoral theses at NTNU;2023:254, Doctoral thesis, 2023) -
New insight to the effects of heat treatment in air on the permeation properties of thin Pd77%Ag23% membranes
(Journal article; Peer reviewed, 2018)Sputtered Pd77%Ag23% membranes of thickness 2.2–8.5 µm were subjected to a three-step heat treatment in air (HTA) to investigate the relation between thickness and the reported beneficial effects of HTA on hydrogen transport. ...