Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"Boiling points"”.
-
The Detection and Identification of Explosives by Canines and Chemical Instrumentation
… is an exponential relationship between relative boiling point and evaporation rate. It has been determined that compounds with higher boiling points have lower evaporation rates than compounds that have lower boiling points. The materials studied thus far are known odor compounds produced by …
-
Capture and recovery of organic gases with electrothermal swing adsorption and post-desorption treatment
… manufacturing, use liquefied organic gases (boiling points (Tb) < 20°C) as inert feedstocks. These processes produce low concentration (e.g., 2,000 ppmv) organic gas streams that must be treated to prevent emissions of the organic gases to the atmosphere. The organic gases are typically not …
-
Vapor-Liquid Phase Equilibria Using Monte Carlo Wang-Landau Simulations
… HMC technique with the WL sampling. The standard boiling points of n-alkanes such as eicosane, tetracosane and triacontane are simulated by implementing the CBMC technique in the WL method in order to sample efficiently the various conformations of the long chain molecules. For copper we obtain a …
-
Transport of n-alkanes through graphene nanoporous atomically thin membrane
… groups and polarities. However, their distinct boiling points allow detection in the gas chromatography-mass spectrometry (GCMS).
-
Shape-selective methylation of meta-cresol
… and, since many of these isomers have similar boiling points, separation via distillation is not in all cases effective or economical. Other separation techniques are often complicated and costly. Consequently, the direct selective synthesis of individual isomers is to be technically highly …
-
A method for the rapid, accurate prediction of the physical properties of middle distillate fuels from LC-¹H NMR derived data
… content, and initial, 10%, 50%, 90%, and end boiling points. These property predictions have accuracies approaching the error for measurement of the experimental physical property and require less than two hours analysis time per fuel. An interface was developed between the NMR spectrometer …
-
Experimental Studies in Temperature Programmed Gas Chromatography
… analysis of complex samples with a wide range of boiling points. It is estimated that 80% of GC users implement TPGC on a regular basis. In 1962, John Calvin Giddings was the first to publish a simple model for TPGC. His theories concerning TPGC are still accepted as the benchmark for explaining …
-
Aspen Plus® simulation and techno-economic analysis of condensation and fractional distillation of plastic waste pyrolysis oil for sustainable aviation fuel production
… reliably predict key fuel properties such as boiling points and combustion energies for the produced PDO fractions, for comparison to the SAF standard. The subsequent selling of the SAF fraction of PDO and accompanying side-products displayed improved profitability compared to solely producing …
-
Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces
… by CAMD were constrained by limiting their boiling points, latent heat of vaporization and thermal conductivity. The selected candidates were further screened using a figure of merit (FOM) analysis. Some of the fluids/additives that have been identified after the FOM analysis include …
-
Molecular selectivity by host-guest methods
… for enantiomers which are isomers with the same boiling points and melting point. However, enantiomers differ by their ability to diffract polarised light. Although countless methods have been used for their separation, one method that has been proven to be certainly successful on this path was …
-
The interplay of nanostructure and efficiency of polymer solar cells
… was fine tuned by using solvents with different boiling points. The main conclusion from these complementary measurements was that the performance-limiting step is the field-dependent generation of free charge carriers, while bimolecular recombination and charge extraction do not compromise …
-
An Apparatus for Measuring the Vapor Pressure of Liquids by the Gas Saturation Method
… determines the vapor pressure by the changes of boiling points with varying barometric pressures. The objections to this method are: the concentration of the solution may change due to evaporation; the solute and solvent may be superheated; and the solute may decompose at high temperatures. The …
-
Hydrothermal liquefaction of microalgae: Influence of varying cell compositions on biocrude yield and quality
… with an increasing fraction of compounds with boiling points between 300–400°C, decreasing nitrogen content, and decreasing average molecular weight distribution. Results from this study contribute to the understanding of the interrelationships between biomass feedstock composition and the …
-
Effect of formulation factors on the skin penetration of drugs
… and pre-hydration), the gap between melting and boiling points of the vehicle, molecular size and lipophilicity and electronic descriptors of the permeants.
-
Hydrothermal Process of Swine Manure to Oil Using a Continuous Reactor System
… of the hydrocarbon compounds in the oil has boiling points within 316°C to 482°C. The aqueous product was found to contain volatile organic compounds primarily ketones and benzenyl compounds. Most of the N, P, and K content of the manure went to the aqueous product. The main gas …
-
Selectivity in host-guest compounds
… components have similar functional groups and boiling points. This thesis aimed to investigate the relationship between the internal structures of host-guest compounds and the selectivity shown by the host molecule when presented with a guest mixture. Four host compounds were used to prepare 29 …
-
Carboxylate metallogels - an adventure in supramolecular chemistry
… was seen. Separation of compounds with similar boiling points was attempted using Fe-phens-EtOH, Fe-tri-EtOH, and Fe-5nite-EtOH. The compounds, 2- and 3-methylpiperidine, disrupted the stabilising interactions within the gel and no separation took place. During the investigation into the role of …
-
Síntesis de nanoestruturas metálicas de oro y plata a partir de precursores organometálicos: Propiedades plasmónicas y catalíticas
… the stabilizing agent and solvents of different boiling points such as tetrahydrofuran, toluene or mesitylene has permitted to exert an excellent control on the size and metal composition of the nanoparticles, allowing us to carry out a deep study of the plasmonic properties of the obtained …
Page 1 of 2