Browsing Institutt for kjemi by Title
Now showing items 544-563 of 1402
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The Impact of Peltier and Dufour Coefficients on Heat Fluxes and Temperature Profiles in the Polymer Electrolyte Fuel Cells
(Peer reviewed; Journal article, 2020)We show that the coupling effects in non-equilibrium thermodynamics for heat-, mass- and charge- transport in the polymer electrolyte membrane fuel cell (PEMFC) all give significant contributions to local heat effects. The ... -
Impact of present and future HVDC links on the nordic power grid
(Chapter; Peer reviewed, 2017)This article presents preliminary results from ongoing work on establishing a simulation model for R&D activities on the impact of the increasing number of HVDC links in the Nordic power grid. The total HVDC power capacity ... -
Impedance Diagrams of the Electrodes in the Polymer Electrolyte Membrane Fuel Cell
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:179, Doctoral thesis, 2007)The objective of this thesis was to better understand the electrodes of the polymer electrolyte membrane fuel cell (PEMFC), and especially the anode. We were interested in how CO poisoning affected the fuel cell and therefore ... -
Improved lifetime and stability of copper species in hierarchical, copper-incorporated CuSAPO-34 verified by catalytic model reactions
(Peer reviewed; Journal article, 2021)The first successful synthesis of hierarchical CuSAPO-34 (3.9 wt% Cu) is reported using the polymer Pluronic F127 as a mesoporous structure directing agent (SDA). X-Ray absorption spectroscopy (XAS) revealed single site ... -
Improved Synthetic Methodology, Substrate Scope and X-ray Crystal Structure for N, N’-disubstituted Guanidines
(Peer reviewed; Journal article, 2024)Guanidine is a privileged scaffold in drug discovery. Herein we report our investigations into the acid promoted amination of pyrimidine-bearing cyanamide to produce N, N’-disubstituted guanidines. Hydrochloric acid was ... -
Improved understanding of reagents used in the syntheses of enantiopure precursors for (S)-atenolol and (S)-metoprolol
(Master thesis, 2019)Målet med denne masteroppgaven var å undersøke effektene av de ulike reagensene brukt i syntesen av enantiomert rene forløpere, som et bidrag til økt miljøvennlighet i totalsyntesene av (S)-atenolol og (S)-metoprolol. Syntesen ... -
Improving the mesoscopic modeling of DNA denaturation dynamics
(Journal article; Peer reviewed, 2018)Although previously developed mesoscopic DNA models have successfully reproduced thermodynamic denaturation data, recent studies show that these overestimate the rate of denaturation by orders of magnitude. Using adapted ... -
Improving the Second law efficiency of a cryogenic air separation unit
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:318, Doctoral thesis, 2011)One-quarter of the worldwide greenhouse gas emissions is emitted by fossil fuel based power plants. In order to limit future climate changes caused by these emissions, several types of CO2-capturing power plants are currently ... -
In silico prediction and experimental verification of ionic liquid refractive indices
(Journal article; Peer reviewed, 2018)Ionic liquids (ILs) have seen increasing use as environmentally friendly solvents in a wide array of applications from energy to pharmaceuticals. Among the many properties of interest, the refractive index, is of considerable ... -
In Situ Assessment of a Novel Underwater pCO2 Sensor Based on NDIR Spectrometry Enclosed in a Semipermeable Membrane for use in Aquaculture. Evaluation of Four Biofouling Protection Mechanisms.
(Master thesis, 2019)I lukkede oppdrettsanlegg med resirkulering av vann (RAS) bestemmes vannkvaliteten hovedsakelig av hvor effektivt vannrensesystemet fjerner metabolitter produsert og utskilt av fisken. Hvis rensesystemet ikke fungerer ... -
In situ detection of an unstable C,N-Au(III) chelate by 15N NMR methods
(Peer reviewed; Journal article, 2022)Au(III)-NHC-oxazolyl complexes are prepared by oxidation and anion exchange of the corresponding Au(I)Cl-NHC-oxazolyl precursors, which are synthesized from appropriate imidazolium pre-ligands. As the Au(III) complexes are ... -
In situ X-ray absorption spectroscopic studies of unsupported and supported CoRe during ammonia synthesis/ammonia decomposition
(Doctoral theses at NTNU;2021:407, Doctoral thesis, 2021)In situ X-ray absorption spectroscopy (XAS) studies are crucial for studying the local environment, oxidation state and speciation of transition metals during thermal pre-treatments and during working conditions of catalysts. ... -
In situ XAS studies on theredox properties of titanium substituted zeotypes
(Master thesis, 2009) -
In-situ XAS studies on gold speciesin zeotypic systems for the oxidation of carbon monoxide
(Master thesis, 2009) -
Incorporation of Fe@Au nanoparticles into multiresponsive pNIPAM-AAc colloidal gels modulates drug uptake and release
(Journal article; Peer reviewed, 2016)Here, a synthetic method has been optimized for the synthesis of thermoresponsive and pH-responsive poly(N-isopropylacrylamide-co-acrylic acid) nanogels which are subsequently loaded with cytochrome C by using a modified ... -
Incorporation of Iron(III) in Silica Aerogels
(Master thesis, 2016)Silica aerogels containing both single site Fe3+ as well as small FexOy nanoparticles of oxide/hydroxide species were synthesized from a waterglass precursor using co-precursor and ambient pressure drying techniques. Fe3+ ... -
Incorporation of Rhenium in ITQ-33
(Master thesis, 2016)ITQ-33 was synthesized by the fluorine route, and the last of three batches was considered phase pure. The as-synthesized samples were then treated with different alkaline and acidic solutions (degermanation), to determine ... -
Influence of Carbon Support on Electronic Structure and Catalytic Activity of Pt Catalysts: Binding to the CO Molecule
(Journal article, 2016)Single-atom catalysts, especially with single Pt atoms, exhibit potentially improved catalytic activity as compared to metal clusters and metal surfaces. Here, the atop and bridged bondings of the CO molecule on the Pt/C ... -
Influence of electrode gas flow rate and electrolyte composition on thermoelectric power in molten carbonate thermocell
(Journal article, 2016)A thermocell (thermo-electrochemical cell) is an electrochemical system with two identical electrodes placed at different temperatures in an electrolyte solution. Ion transport between the electrodes due to the temperature ... -
Influence of Electrode Gas Flow Rate and Solid Oxide Ratio in Electrolyte on the Seebeck Coefficient of Molten Carbonate Thermocell
(Journal article; Peer reviewed, 2017)Thermocells represent a promising way to utilize heat as a power source. The aim of this work is to develop a thermocell with identical gas electrodes using molten carbonate-based electrolytes. The cell can generate power ...