Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 1105-1124 of 1748
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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. ... -
New mechanism insights into methane steam reforming on Pt/Ni from DFT and experimental kinetic study
(Peer reviewed; Journal article, 2020)In this contribution, we combine density functional theory (DFT) calculations, experimental kinetic study and DFT-assisted analysis to elucidate the impact of the interface of monolayer Pt on the Ni surface on catalytic ... -
New Nuclear Magnetic Resonance Approaches on the Evolution of Wax Mobility during Wax Crystallization
(Peer reviewed; Journal article, 2021)Wax crystallization at low temperature is one of the main problems affecting flow assurance during oil production. Wax inhibitors, such as pour point depressants (PPDs), and crude oil components, such as asphaltenes, are ... -
New Polyalkylated Imidazoles Tailored for Carbon Dioxide Capture
(Journal article; Peer reviewed, 2018)Aqueous polyalkylated imidazoles have gained interest as potential CO2 capture solvents due to their high oxidative stability and low vapor pressures compared to traditional amines. In this work, 21 aqueous solutions of ... -
New solvent blends for post-combustion CO2 capture
(Journal article; Peer reviewed, 2019)In the current work five different solvent blends are experimentally studied and the reboiler duties are calculated using the so-called short-cut method. Tertiary amines, 2-(diethylamino)ethanol (DEEA), 3-(Diethylamino)- ... -
Nickel and Iron Poisoning of Copper Based Methanol Synthesis Catalysts
(Master thesis, 2015)Discharged methanol synthesis catalysts are known to contain various amounts of nickel and iron. The purpose of this master thesis was to study nickel and iron poisoning of commercial copper based methanol synthesis catalysts ... -
Nickel Cobalt Catalyst for Methane Abatement in Marine Machinery
(Master thesis, 2017)Natural gas vehicles (NGVs) have been suggested as an alternative to conventional vehicles in the marine sector, in order to reduce the large contribution this sector provides to greenhouse gas emissions. Natural gas has ... -
Nickel Promoted Cobalt Fischer-Tropsch Catalysts - Effect of Nickel on reducibility and Cobalt dispersion
(Master thesis, 2012)The effect of nickel promotion in cobalt Fischer-Tropsch catalysts towards reducibility and cobalt dispersion was investigated. A series of catalysts loaded with 20% Co and 0-10% Ni on gamma-alumina were impregnated by the ... -
NiCo2O4 Catalyst on Commercial Low Surface Area and Synthesized High Surface Area CeO2 For Catalytic Methane Abatement in Natural Gas Engines
(Master thesis, 2020)Større utnyttelse av naturgass som marint brensel blir sett på som en mulig del av den globale, men også nasjonale løsningen med tanke på å redusere utslipp av klimagasser. Dette forutsetter midlertidig at overskuddsmetan ... -
Nitrogen-containing carbon nanofibers as supports for bimetallic Pt-Mn catalysts in aqueous phase reforming of ethylene glycol
(Peer reviewed; Journal article, 2023)Aqueous phase reforming (APR) of ethylene glycol was performed at 225 °C and 30 bar in batch and continuous reaction conditions. The effect on the APR performance by functionalizing carbon supports with nitrogen and adding ... -
Nitrogen-doped carbon nanofiber catalyst for ORR in PEM fuel cell stack: Performance, durability and market application aspects
(Journal article; Peer reviewed, 2016)A noble metal-free catalyst based on N-doped carbon nanofibers supported on graphite (N-CNF1 ) was employed for the oxygen reduction at the cathode of a Nafion PEMFC with a commercial Pt/C anode. Obtained performance in ... -
Nitrogen-Doped Carbon Nanofibers as Pt-Free Catalyst in the Oxygen Reduction Reaction - A study of iron nanoparticles as N-CNF catalyst on different supports
(Master thesis, 2015)A new approach was tested as nitrogen-doped carbon nanofibers (N-CNFs) were synthesized by using uniformly sized iron nanoparticles (FeNPs) on two different support as their growth catalyst. The N-CNFs are designed as a ... -
Nitrogen-doped Carbon Nanofibers for the Oxygen Reduction Reaction
(Doctoral theses at NTNU;2017:78, Doctoral thesis, 2017)Summary of thesis: One of the major obstacles for the commercialization of fuel cells is the necessity for high cost noble metals to facilitate the electrode reactions. Especially the oxygen reduction reaction (ORR) is ... -
Nitrogen-doped Carbon Nanofibers for the Oxygen Reduction Reaction: Importance of the Iron Growth Catalyst Phase
(Journal article; Peer reviewed, 2017)A systematic evaluation of the oxygen reduction reaction (ORR) on nitrogen-doped carbon nanofibers (N-CNFs) has been performed by tuning the properties of the N-CNFs by using chemical vapor deposition. Analysis of the ... -
Nitrogen-doped carbon nanofibers on expanded graphite as oxygen reduction electrocatalysts
(Journal article; Peer reviewed, 2016)A single-step chemical vapor deposition method using simple gaseous precursors was employed to grow nitrogen-doped carbon nanofibers from Fe and Ni particles on the surface of expanded graphite (N-CNF/EG). Due to the high ...