The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Equilibria and kinetics for reactive extraction of pranoprofen (PRA) enantiomers with methyl-β-cyclodextrin (Me-β-CD) in water as diluent were reported. The theory of extraction accompanied by a chemical reaction has been used to obtain the kinetics. The reactions between Me-β-CD and PRA enantiomers fall in Regime 3. The reactions are first order with respect to PRA and second order with respect to...
The inherent cavitational activity in the ultrasonic horn and ultrasonic bath can be further enhanced using different additives which can also aid in decreasing the processing cost of the operation. The present work deals with evaluation of different additives for enhancing the cavitational effects using a model reaction of potassium iodide oxidation. Two reactors with varying capacity have been used...
Electric field generated by pulsed high-voltage discharge plasma over water surface has been performed under high-pressure argon environments to oligomerize pyrrole compound. In this preliminary study, oligomerization of pyrrole in water as a reaction media and the effects of various parameters with pulsed high-voltage arc discharge plasma are studied. Such as plasma applied under hydrothermal conditions...
The growing emissions of nitrogen oxides into atmosphere endanger the human health and degrade our environment. In this work the application of ozone for the oxidation of nitrogen oxides present in exhaust gases was described. The main concept of the process is to oxidize nitrogen monoxide (NO) and nitrogen dioxide (NO 2 ) into dinitrogen pentoxide (N 2 O 5 ) which reacts with...
Several geometries of the hydrocyclones have been proposed in the literature to improve the separation efficiency or reduce the energy costs. In the present paper, a new geometrical configuration of hydrocyclone has been found through the use of response surface technique combined with the Differential Evolution algorithm. The result obtained with these optimization techniques has been validated by...
Effect of operating conditions such as feed temperature, feed circulation rate and feed inlet concentration on permeate flux in a direct contact membrane distillation (DCMD) have been simulated. The effects of these parameters on both temperature and concentration polarizations have also been taken into account. A simultaneous heat and mass transfer model has been used in the DCMD system. The model...
In this work mathematical programing has been used to study the process economics, carbon dioxide emission and energy flows of a future steel plant which is integrated with a polygeneration plant. The system considered includes an integrated steelmaking plant with conventional or novel ironmaking technologies with top gas recycling and CO 2 stripping, a CHP plant and a methanol plant. Oil,...
For the purpose of increasing the dispersibility and thermal conductivity of fluid containing nanoparticles, raw multi-walled carbon nanotubes (MWCNTs) were treated by strong acids. The purified structures were dispersed into aqueous solution by using wet grinding conditions at various rotation speeds (300–600rpm) merged with ultrasonication. The particle size analyzer reveals that the agglomerated...
Among biofuels, bioethanol has increased in importance in many countries because it can be used directly or mixed with gasoline in combustion engines. The production of bioethanol in a fermentative process usually gives a dilute solution from which the bioethanol must be obtained in high concentration in order to be used as biofuel. The separation of an azeotropic mixture of ethanol and water using...
This research deals with a hybrid hydrocyclone process, involving micro-bubbles injection generated by the dissolved air flotation technique; the micro-bubbles allow the aerated flocs formed by coagulation and flocculation to be separated inside the hydrocyclone. The floc separation is induced by centrifugal force. The lighter phase moves toward the center of the hydrocyclone and the heavier one to...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.