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Viser treff 1636-1655 av 1784
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Tailoring the structure of Co-Mo/mesoporous γ-Al2O3 catalysts by adding multi-hydroxyl compound: A 3000 kt/a industrial-scale diesel ultra-deep hydrodesulfurization study
(Journal article; Peer reviewed, 2018)Ever-increasing concern on environmental impacts (e.g., sulfur pollution) by fossil fuels has triggered the research on hydrodesulfurization (HDS). In this work, Co-Mo nanoparticles were deposited on the mesoporous γ-Al2O3 ... -
Taming Electrons in Pt/C Catalysts to Boost the Mesokinetics of Hydrogen Production
(Peer reviewed; Journal article, 2022)Taming the electron transfer across metal–support interfaces appears to be an attractive yet challenging methodology to boost catalytic properties. Herein, we demonstrate a precise engineering strategy for the carbon surface ... -
Tandem Catalytic Upgrading of Biomass Fast-Pyrolysis Constituents to Fuels
(Doctoral theses at NTNU;2019:51, Doctoral thesis, 2019)The increasing human population and it’s associated economic, environment and geopolitical demands towards sustainable transport energy have advanced research onto renewable liquid fuel production and aviation fuel range ... -
Tandem hydrodeoxygenation catalyst system for hydrocarbons production from simulated bio-oil: Effect of C-C coupling catalysts
(Peer reviewed; Journal article, 2021)Research in the sustainable conversion of biomass to fuels and chemicals is a necessity for the reduction of the carbon footprint in transport energy. Herein, we demonstrate an efficient tandem catalyst to selectively ... -
Techno-Economic Evaluation of CO2-Selective Facilitated Transport Membranes for an IGCC Power Plant
(Master thesis, 2022)Formålet med denne avhandlingen er å presentere en teknoøkonomiskanalyse av fasilliterttransport hulfibermembraner for H2-rensing og karbonfangst for et integrert gassifiserings- kombinertsykluskraftverk. To membranpro ... -
Techno-economic evaluation of helium recovery from natural gas; A comparison between inorganic and polymeric membrane technology
(Journal article; Peer reviewed, 2019)Natural gas produced at high pressure (50-70 bar) is the only industrial source of helium (He). A membrane separation process may offer a more efficient production system with smaller footprint and lower operational cost ... -
Terbium Doped ITO Thin Films Prepared by an Aqueous Sol-Gel Method
(Master thesis, 2013)Transparent conducting oxides (TCOs) combine the properties of optical transparency in the visible region of the electromagnetic spectrum and a near-metallic electrical conductivity. This combination make them very applicable ... -
Testing and Optimization of Nano Particles Reinforced PVAm/PVA Blend FSC Membranes for High Pressure Natural Gas Sweetening
(Master thesis, 2012)Employing gas separation membranes for natural gas sweetening is a cheaper, simpler, more energy ecient and an environmentally friendly alternative to separate CO2 from methane. Signicant advances has been made in ... -
Testing and Optimization of PVAm/PVA Blend Membranes for Biogas Upgrading
(Master thesis, 2012)Membrane technology is an energy saving, environment friendly and low cost separation technology. This master’s thesis has focused on testing and optimization of polyvinylamine/polyvinylalcohol (PVAm/PVA) blend fixed-site-carrier ... -
Testing of large-scale CNF synthesis reactor
(Master thesis, 2012)CNFs were synthesized on supports to develop structured catalysts for water treatments. Estimation tasks of reactants and electrical power needs were accomplished. The supports are made up of carbon felt exchanged with ... -
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 ... -
The beginning and the end of gene expression
(Doctoral thesis at NTNU;2016:8, Doctoral thesis, 2016)Summary of thesis: Gene expression -- the synthesis of RNA and protein -- requires most of the cell's energy and is a highly regulated process at all its levels. In this thesis, regulation of gene expression has been ... -
The beginning and the end of gene expression
(Doctoral thesis, 2016-09-09) -
The effect of aerosol-deposited ash components on a cobalt-based Fischer–Tropsch catalyst
(Journal article; Peer reviewed, 2019)The effect of ash salts on Co-based Fisher–Tropsch catalysts was studied using an aerosol deposition technique. The major elements in the ash were found to be K, S and Cl. The ash was deposited on a calcined catalyst as ... -
The Effect of Calcium Ions on Oil-Brine-Surfactant Interfacial Properties and the Relation to Surfactant Enhanced Oil Recovery at Low Salinity
(Doctoral thesis at NTNU;2015:228, Doctoral thesis, 2015)The present thesis addresses the effect of calcium ions on the interfacial chemistry between oil and solutions of anionic surfactants, and its relevance for enhanced oil recovery (EOR) methods at low salinity. A number ... -
The effect of calcium/sodium ratio on the dynamic adsorption of sodium dodecyl benzene sulfonate (SDBS) onto water/air interfaces. Evaluation of critical micelle concentrations, diffusion coefficients and molecular areas
(Master thesis, 2016)Test how calcium/sodium-ratio affect the dynamic adsorption of sodium dodecyl benzene sulfonate (SDBS) onto water/air interfaces where the ionic strength is kept constant at 20 mM, with the use of maximum bubble pressure ... -
The Effect of Copper Loading on Iron Carbide Formation and Surface Species in Iron‐Based Fischer–Tropsch Synthesis Catalysts
(Journal article; Peer reviewed, 2018)The effect of copper as promoter on iron carbide formation and the nature of surface species on iron‐based catalyst during Fischer–Tropsch synthesis (FTS) was investigated. Iron‐based catalysts (15 wt % of Fe) supported ... -
The effect of dissolved gas on coalescence of oil drops studied with microfluidics
(Journal article; Peer reviewed, 2018)Hypothesis In literature it is stated that the stability of oil-in-water emulsions could be enhanced by decreasing the so-called “hydrophobic interactions” between surfaces through removal of dissolved atmospheric gases. ... -
The effect of fibre wall thickness and microfibril angle on TMP energy consumption, fibre development and paper properties
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:117, Doctoral thesis, 2011)The overall objective of the “Basic phenomena in mechanical pulping” project financed by NER (the Nordic Energy Research) of which the PhD study was a part, was to show a radical reduction (30%) in specific energy consumption ... -
The Effect of Liquid Exposure on PTMSP/TiO2 Nanocomposite Membranes for Gas-Liquid Membrane Contactors for Removal of CO2 from Natural Gas
(Master thesis, 2014)This project concerns the development of membrane materials for use in gas-liquid membrane contactors for the removal of CO2 from natural gas. In this application, the membrane is primarily intended to prevent any phase ...