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Showing 1 to 14 of 14 for “"thermal dissociation"”.
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Determination of kinetic parameters of the thermal dissociation of methane
The solar thermal decomposition of methane could be an economically and ecologically beneficial process to produce hydrogen and particulate carbon. Aiming at the determination of general kinetic laws and parameters the thermal dissociation of methane was examined employing an alumina tubular …
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Indirect Detection of Explosive Vapours by Thermal Dissociation Cavity Ring-Down Spectroscopy
… catalyst heated to 350 °C to catalyze the thermal dissociation of nitroaromatic explosives, such as 2,4,6 trinitrotolune (TNT), to NO2 prior to detection. The catalytic thermal dissociation (cTD) CRDS was found to have a (1s, 3σ) limit of detection (LOD) of 0.5 ppbv. The LOD was sufficient …
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Penning ionization studies using a crossed-beam technique
… for the investigation of Penning ionization at thermal energies has been designed and constructed. Details are given for the production of a beam of helium metastable atoms by electron impact excitation. The production of well-collimated neutral beams of stable species using multi-channel …
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The Photochemical Reactions of Dirhenium Decacarbonyl With Water and of Dinuclear Rhenium Carbonyl Complexes Substituted by Nitrogen Bases
… involving cross-coupling of radical species, thermal dissociation of bound H(,2)O molecules, oxidative addition of H-OH across two metal centers, and metal carbonyl hydride elimination. Supporting thermal and photochemical reactions of Re(,2)(CO)(,10) and eq-Re(,2)(CO)(,9)(OH(,2)) are also …
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Haloethane Reactions over the Chromia Cr₂O₃ (1012) Surface
… α-Cr₂O₃ (1012) surface by means of thermal dissociation. Ethyl iodide is dissociated giving iodine adatoms and ethyl fragments bound to surface Cr cation sites, while ethyl chloride is dissociated giving chlorine adatoms and ethyl fragments. No oxygenated products are observed in …
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Evaluation of ethane as a power conversion system working fluid for fast reactors
… HSC® chemical kinetics code was used to study thermal dissociation and chemical interactions for ethane and other coolants under a variety of conditions. The NIST database was used for reaction rates. Overall results were not conclusive. The supercritical behavior of ethane at high pressures is …
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Nanoparticle Self-Assembly for the Synthesis and Processing of Ordered Nanocomposite Solids
… they render assembled structures susceptible to dissociation upon changes in the solution environment, limiting their processability outside of these narrow conditions. This work presents various methods for improving NCT superlattice stability and processability into polymer nanocomposites. …
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Real-time Three-Dimensional DNA Microarrays: How Well Can We Distinguish Between Related Target Sequences?
… Bi-phasic behavior was demonstrated in thermal dissociation curves in a multi-component system, showing promise for distinguishing between related sequences. Finally, the utility of including mismatch probes on the array for distinguishing between related sequences was explored …
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Elucidating the chemistry of particulate and chlorinated nitrates in the troposphere through method development, and chamber and field studies
… A method to quantify NH4NO3 and NaNO3 aerosol by thermal dissociation cavity ring-down spectroscopy (TD-CRDS) was developed. At inlet temperatures of 540 °C and 620 °C, respectively, scatter plots of SMPS volume distribution data and TD-CRDS mixing ratios correlated (r2>0.9) with unity slopes in …
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Investigating the binding mode of azide labelled derivatives of Hoechst 33258 by NMR, UV-Vis and IR spectroscopy
… of dsDNA: small molecule ligand association and dissociation through 2D-IR spectroscopy. The strategy employed was to synthesise azide-bearing derivatives of the archetypal minor groove binding ligand, Hoechst 33258, with the azide acting as a reporter functional group. Chapter 1 describes both …
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New Avenues in Atmospheric Modelling of Exoplanets
… a new paradigm for atmospheric retrievals of thermal emission spectra, as well as chemical detections using both high-resolution Doppler spectroscopy as well as low-resolution transit spectroscopy. I firstly computed the molecular and atomic cross sections of various species prevalent in the …
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Multi-scale Analysis of Methane Gas Hydrate Formation and Dissociation via Point Source Thermal Stimulation and Carbon Dioxide Exchange
The formation and dissociation of methane gas hydrate was investigated over a range of laboratory scale systems with sample volumes of 1.3 cm3, 0.059 m3 and 0.141 m3. Three unique hydrate apparatuses were used to study a point source thermal dissociation method in which gas production profiles and …