1,721,003 research outputs found
The Effect of Surface Interactions on Morphology and Fracture Behaviour of Ultrafine CaCO3/High Density Polyethylene Nanocomposites
No full textProcessing, Microstructure and Mechanical Properties of Microwave Sintered Liquid Phase Alumina
No full textSoil Remediation by Petroleum Products: Modeling and Experimental Investigation of Microwave Treatment
No full textThe microwave-generated steam treatment of contaminated soil is based on incrementing the temperature by microwave energy irradiation in the presence of a sufficient moisture amount. Therefore the previous knowledge of the temperature distribution in the irradiated soil is essential for the correct application of the treatment. In this work a mathematical model was developed to describe the heat and the mass transfer evolution in a soil-water system during the microwave remediation. The time-dependent model was based on mass and energy conservation equations and had the purpose to outline the temperature and humidity variations during the time and along the soil sample depth. As a preliminary drafting of the model the following assumptions were made: 1) no reactions in the soil, 2) no radial moisture and temperature gradients. A key role is played by the overall dielectric properties which drive the absorption of energy by the soil and, at the same time, are subjected to change with moisture content and temperature. Microwave heating was performed on
laboratory-scale experiments, measurement of temperature and residual moisture amount were carried out during the time and along the sample depth. The agreement between the experimental values and the numerical results was appreciable both for the temperature and the moisture amount. Further tests with linear hydrocarbons (noctane, n-decane, n-dodecane, etc...), mixture of them and kerosene confirmed the necessity of an optimum moisture content in the soil in order to achieve a costeffective use of microwaves for soil decontamination
Biopolymer Based Nanocomposites: Blends of Polylactic Acid/Aliphatic-Aromatic Copolyesters Filled with Layered Silicates
No full textComparison of SEVNB (Single Edge-V-Notched Beam) and IF (Indentation Fracture) Techniques for Fracture Toughness Measurement on Glass-Ceramic Materials
No full textMicrowave Assisted Chemical Vapour Infiltration for the Production of Ceramic Matrix Composites
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