Mohammad Hassan Vakili
Dept. of Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran
[ 1 ] - Microencapsulation of Butyl Stearate as Phase Change Material by Melamine Formaldehyde Shell for Thermal Energy Storage
Butyl stearate as a phase change material was microencapsulated within melamine-formaldehyde resin using emulsion polymerization. Morphology and thermal specification of produced microcapsules were studied by Fourier transform infrared spectroscopy, FT-IR, scanning electron microscopy, SEM, and Differential scanning calorimetry analysis, DSC. FT-IR spectra validated the existence of the butyl s...
[ 2 ] - A new generalized model for predict speed of sound of refrigerants
In consideration of physical and chemical properties of pure substances, speed of sound is one of important quantity which can used to calculate many of other thermo-physical properties such as isothermal compressibility, Joule-Thomson coefficient, isobaric heat capacity and etc. These thermo-physical properties are the main parameters in industrial and chemical processes. Development of accura...
[ 3 ] - مطالعه اثر مخلوط بیوپلیمر-ماده فعال سطحی بر عملکرد گل حفاری پایه آبی
در این تحقیق به بررسی اثر بیو پلیمر زانتان گام و ماده فعال سطحی تالو آمین پلی اتیلن گلایکول بر روی مشخصات گل حفاری پایه آبی پرداخته شده است. اثر افزودن بیوپلیمر، ماده فعال سطحی و مخلوط‌هایی با نسبت‌های مختلف از آنها بر گرانروی مؤثر، تنش برشی و میزان صافاب مطالعه شده است. نتایج نشان می‌دهد که مخلوط بیوپلیمر – ماده فعال سطحی، از نظر خواص رئولوژیکی و خواص کنترل کننده صافاب نسبت به سیالی که بر پایه...
[ 4 ] - A Simple Equation for the Thermal Conductivity of Saturated Vapor Refrigerants
The ability of a material to supply heat by means of conduction is called thermal conductivity, which is defined by Fourier's equation. Thermodynamic data on environmental refrigerants have attracted considerable interest in the design and optimization of refrigeration equipment, such as heat compressors and exchangers. After analysis of statistical effects, a new simple correlation was develop...
[ 5 ] - An Accurate Empirical Correlation to Estimate Sonic speed of Ionic Liquids
In recent years there has been a great deal of attention paid by researchers in investigating ionic liquids (ILs) mainly due to the tremendous potential that ionic liquids have in reaction and separation technology. Sonic speed is an important thermodynamic property of ionic liquids (ILs) and always chosen as a source to determine other properties. A database for the sonic speed of pure ILs cre...
[ 6 ] - An Empirical Correlation for Estimation of the Thermal Conductivity of Saturated Liquid Refrigerants
Thermodynamic data on environmental refrigerants have attracted considerable interest in the optimization and design of heat compressors, exchangers and other refrigeration equipment. In this study, An optimization algorithm was used to obtain the constant parameters of the new empirical model by fitting them to the source databank. The model was used to calculate the constant coefficients of t...
[ 7 ] - Oxidative desulfurization of light fuel oil by using hydrogen peroxide in the presence of acetic acid catalyst
Hydrogen peroxide as an oxidant agent was used for desulfurization of a petroleum hydrocarbon fraction (C10-C22) with boiling range of 175-375 ℃, (light fuel oil) in the presence of acetic acid as catalyst. The oxidation was performed in an ultrasonic bath. It is found that increasing the amount of hydrogen peroxide lead to increase the oxidation rate and so desulfurizatio...