An analytical description of the nucleation stage in a supersaturated vapor with instantly created supersaturation is given with taking into account the vapor concentration inhomogeneities arising as a result of depletion due to nonstationary diffusion onto growing droplets. This description is...

Direct coal liquefaction has been studied and practiced since the 1930s. It was used in Germany during World War II to produce synthetic fuels when there was no oil allowed into the country. Since then, it has been studied in the United States and many different technologies have been...

The apparent activation energy of transesterification of soybean oil with methanol was investigated by the use of magnesium methoxide as solid base catalyst. The effect of variations in reaction time and temperature (50-65°C) on the macro reaction rate were studied while the molar ratio of...

The walnut shell with particle size less than 0.154 mm pyrolysis mass loss behaviour was studied at different heating rates (5, 10, 20, 30, 40°C/min) using pyris1 thermogravimetric analysis (TGA) instrument. Results showed that the activation energies of walnut shell pyrolysis under the...