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 307 for “"thermogravimetric analysis"”.
-
Investigation of Spontaneous Combustion Inhibition of Coal Fires Utilizing Differential Scanning Calorimetry and Thermogravimetric Analysis
… formulation. Multiple approaches including thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were used to analyze these effects. Results showed these novel formulations can reduce spontaneous combustion potential, making coal more thermally stable. Mechanisms by …
-
Development and Implementation of a Standard Methodology for Respirable Coal Mine Dust Characterization with Thermogravimetric Analysis
… to examine the potential of a novel method for analysis and characterization of coal mine dust. Respirable dust has long been an industry concern due to the association of overexposure leading to the development occupational lung disease. Recent trends of increased incidence of occupational lung …
-
An Improved Thermogravimetric Analysis Method for Respirable Coal Mine Dust and Comparison to Results by SEM-EDX
… research group established a preliminary thermogravimetric analysis (TGA) method for coal mine dust. The method is intended to allow estimation of three key mass fractions of the dust from separate sources: coal from the coal strata being mined; non-carbonate minerals from the rock strata …
-
Use of ultrasonication, thermogravimetric analysis and newly developed hot-air drying platform for evaluation and optimization of drying processes of agricultural materials
… ultrasound pretreatment was shown to reduce the thermogravimetric analyzer (TGA) drying time by up to 22%, yielding products with lower equilibrium moisture content (which can improve shelf-life), and increasing the hydration rate and equilibrium moisture content of hydrated grains. The second …
-
A study of liquid clathrates
… by various chemical methods including: thermogravimetric analysis, differential thermal analysis and proton nuclear magnetic resonance spectroscopy.
-
Physicochemical study of inclusion of drug molecules in cyclodextrins
… determination of the chemical composition, iii.) analysis of thermal behaviour and iv.) investigation of the solid state features of the complexes. Ultraviolet spectrophotometry, elemental analysis and thermogravimetric analysis were the principal techniques used for determination of composition. …
-
Porous Materials Prepared by Ultrasonic Spray Pyrolysis
… were observed (as indicated by SEM and TEM). Analysis of the carbon precursors using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) suggests that the decomposition behavior of each precursor is responsible for the observed morphology differences. These carbon …
-
Síntese e caracterização de um novo agente sililante - imobilização na sílica gel em meio aquoso.
… The new solids were characterized by elemental analysis of CHNS, infrared spectroscopy, NMR 13C and 29Si, thermogravimetric analysis and surface area. The surface area were 0.43 m2g-1 and 193 for solids AMPTGA and Sil-AMPTGA, respectively, which were lower than that of silica gel precursor 484 …
-
Selective criteria in Werner clathrates
… of the compounds were analysed by thermogravimetric analysis and differen.tial thermal analysis. The structures of two related compounds [Ni(NCS)2(Py)4] and [Ni(NCS)2(Py)4].nbenzene were also studied.
-
Physicochemical studies of the inclusion of selected agrochemicals in cyclodextrins
… inclusion complexes were evaluated using thermogravimetric analysis.
-
Crystal engineering of mixed-ligand metal-organic frameworks based on simple carboxylate and bipyridyl ligands
… by combining powder X-ray diffraction with thermogravimetric analysis show that it can lose coordinated water, that comes from the reaction solvent, upon heating, and reabsorb water from the atmosphere, ultimately regaining its original structure. All MOFs were synthesized via the …
-
Oxidation Chemistry of Some Early Transition-Metal Layered Perovskites
… metals (M2+) that are receptive to oxidation. Thermogravimetric analysis (TGA) shows oxygen uptake at low temperatures (< 500 °C) and subsequent X-ray powder diffraction indicates that the host structure is maintained upon oxidation. Also through EDAX of the starting material and products, it …
-
Preparation and solid state properties of cyclodextrin complexes of selected drug molecules
… is reported. The complexes were characterised by thermogravimetric analysis (TG), differential scanning calorimetry (DSC), ultraviolet spectrophotometry (UV), infrared spectroscopy (IR), X-ray powder diffraction (XRD) and single crystal X-ray analysis.
-
Investigations of the Therman Treatment of Sodium Thiosulfate in Gas Streams for the Removal of I2
… and SO2 conversion were analyzed using thermogravimetric analysis combined with chromatographic techniques. Thermogravimetric analysis (TGA) measurements determined the decomposition of the acidification reaction of 30% sodium thiosulfate solution in a 14% carbon dioxide (CO2) atmosphere …
-
Laboratory Scale Study of Calcium Sulfate Hydration Forms
… kinetics of these processes were studied using thermogravimetric analysis and sorption analysis. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the products from different processes. In addition to the instrumental studies, small batches were handled in …
-
Degradation Product Analysis of Bismaleimide Composite
… up to 600°C. Its weight change is followed thermogravimetrically for stability assessment. The effect of aging gas environment is also studied. The use of on-line gas cell fourier transform IR spectrometer (FTIR) and mass spectrometer (MS) allows for the identification of decomposition …
-
Synthesis and characterization of purely sulphonated and composite membranes for high temperature fuel cells
… observe their properties compared to Nafion were thermogravimetric analysis (TGA), Fourier transmission infrared spectroscopy (FT-IR), electrochemical impedance spectroscopy (used to determine proton conductivity) and fuel cell performance.
-
Triptycene side unit effects on compressive yield strength in polycarbonates
… degradation of the samples was checked for using Thermogravimetric Analysis. Results indicated that triptycene-containing polycarbonates had higher compressive yield strengths than non-triptycene polycarbonates. The polymers were stronger due to the interlocking mechanism and the steric hindrance …
-
The relationship between the nutrient status and flammability of forest fuels
… and combustibility has been measured by Thermogravimetric Analysis . (TGA) and Derivative Thermogravimetric Analysis (DTG). Results derived from LOI and TGA are seen to be more reproducible and reliable than other methods commonly used in m~asuring forest fuel flammability. The first …
Page 1 of 16