DI FELICE R.

In this work, the kinetics for the reaction of CO2 with three chemical solvents were studied experimentally and theoretically. The CO2 absorption flux into the potassium lysinate (K-Lys), methyldiethanolamine (MDEA), and their blends was measured over the CO2 partial pressure range of 50–500 kPa, and at temperatures 298.15, 303.15, and 313.15 K...

In this work, characterization and kinetics of CO2 absorption in potassium carbonate (K2CO3) solution promoted by diethylenetriamine (DETA) were investigated. Kinetics measurements were performed using a stirred cell reactor in the temperature range of 303.15–323.15 K and total concentration up to 2.5 kmol m−3. The density, viscosity, physical...

Liquid fluidization can be encountered in industrial practice in a variety of processes including particle classification and separation and backwashing of filter media. In any fluidized system, overall bed height changes with fluid velocity. This chapter introduces the correlation between voidage and fluid velocity and presents some...

The emission of large amounts of CO2 into the atmosphere is believed to be a major reason behind climate change, which has led to increased demand for CO2 capture. Postcombustion CO2 capture with chemical solvent is considered one of the most important technologies in order to reduce CO2 emission. Amino acid salt solutions have attracted...

Friction phenomena play a key role in discrete element method (DEM) modeling. To an-alyze this aspect, we employed the open-source program MFiX to perform DEM simulations of cylindrical vertical columns filled with solid particles. These are still associated with and described by the pioneering model by the German engineer H.A. Janssen. By...

The blast furnace is the principal method of producing cast iron. In the production of cast iron, the control of silicon is vital because this impurity is harmful to almost all steels. Artificial neural networks with Bayesian regularization are more robust than traditional back-propagation networks and can reduce or eliminate the need for...

This work analyses in detail the transition process from the fixed to the fluidized state for homogenous and binary mixtures of particles differing in density, with different initial configurations. The phenomenon is studied in cylindrical columns fed with water, with the aid of CFD-DEM numerical simulations. With regard to the homogenous case,...

The discrete element method (DEM) is an important tool to simulate granular systems with high accuracy. Depending on the application, it is often unclear which model is more appropriate for the calculation of collision forces: the Hertzian approach is generally considered more accurate, but it makes the simulation significantly slower than the...

The experimental and numerical study of two-phase gas–liquid flows in the external-loop airlift reactor is presented. The effect of riser-to-downcomer cross-sectional area ratio on the mixing hydrodynamic efficiency, gas holdup, and circulation liquid velocity is investigated. The transverse dimensions of vertical columns are 2.5 cm, 5 cm and...

In recent years, interest in artificial intelligence and the integration of Industry 4.0 technologies to improve and monitor steel production conditions has increased. Every day, several models are proposed to simulate industrial processes. In this sense, committee machines are presented as competitive alternatives to solve this task. A...

Solid oxide fuel cells (SOFC) are the most efficient devices for directly converting the chemical energy of a fuel into electrical energy. This is one of the main reasons why these fuel cells have received a lot of attention from the scientific community and from several developers who have invested in the use of this technology in various...

This work is a companion to a previous article, Part I, published in The Canadian Journal of Chemical Engineering, dealing with CO2 absorption in aqueous solutions containing a single aminic reagent (specifically methyldiethanolamine (MDEA) or piperazine (PZ)). In this second part, different PZ/MDEA mixtures are experimentally studied and their...