Chemical engineering

For model validation purpose, Particulate Solid Research Inc. (PSRI) and National Energy Technology Laboratory (NETL) organized the modeling competitions in the form of third Challenge Problem []. By providing the geometry of a circulating bed and operating parameters for different conditions, the organizers asked modelers to predict the hydrodynamic characteristics without prior knowledge of test results. In third Challenge Problem, the CFD models did better than their performance in first and second

2. Throughput is defined as Throughput=Min {Input rate, Process capacity, Demand rate} Input Rate = 3000 bbls/hr Input Rate and Demand Rate > Process Capacity Throughput =Min {Process Capacity} It is evident from the process flowchart that the capacity of the drying unit is minimum at 450 and maximum at 600 bbls/hr. However, this does not apply to dry berries. Both dry and wet berries go through the separation process with a capacity of 1200 bbls/hr. Since 70% of the berries are wet

Tablet Properties of Xylitols Hardness of tablets made from different xylitols investigated was plotted against the compression pressures applied during formation of tablets (Fig. 9). Regardless of the type of xylitol, the compression pressure had generally a positive effect on the hardness of xylitol tablets (Fig. 9). Botryoidal-shaped crystallized xylitol powder produced considerably harder tablets (maximum hardness of 43 N at 2000 psi) than commercial xylitol (maximum hardness of 17 N at 1500

due to the high latent heat of vaporization, as well as, the inefficiency of using hot air as the most common drying medium. Hence, the operating cost of dryers represents their major cost item. Drying is an important process in many fields such as chemical, agricultural, ceramics and pharmaceutical industries. It may be done to have free-flowing solids that are easy to handle, to facilitate the preservation and storage of different materials, to reduce the transportation costs or to achieve desired

Foam separation techniques are neither much widely used nor much research have been done in this area lately. But due to the high selectivity, thermal stability and the ability to separate components from very dilute solutions (as low as 10- 10 mole/liter), it is worth being applied as modern separation and purification techniques. Particulates that are to be separated from solution are associated with surfactants and are adsorbed at the liquid air interface. Interaction energy between the nonpolar

Working principle of the hybrid ADC system AD cycle consists of four processes as shown in Fig. 4. These processes are: Isosteric heating process (1 2): adsorption pair is heated without changing initial adsorbate concentration (C_i ). Isobaric desorption process (2 3): adsorption pair is heated up with changing adsorbate concentration from C_i to final concentration (C_f ). On the other side, the desorbed water vapor is condensed in condenser releasing heat of condensation at condenser temperature〖

medium fluidized bed (ADMFB) [17–19]. Because of the advantages of high gas–solid contact efficiency, the fluidized bed has been widely investigated in catalytic cracking [20], drying [21], combustion [22], and other chemical industries, which have a significant effect on the chemical, environmental, and metallurgical industry around the world. As the novel application of the fluidized bed in the mineral field, ADMFB would significantly enrich the theory and application of the fluidized bed. At present

This work presents a system of a non-linear PDEs, which governing the MHD flow of a Homann nanofluid with heat and mass transfer through a porous medium. The problem is solved numerically by making use of the finite difference method. The formulas of the velocity components, temperature and concentration are obtained as functions of the problem physical parameters. The effects of these parameters on the solutions are illustrated numerically and graphically through a set of figures to reinforce the

Thermal Cracking: The simple distillation of crude oil produces various types of products and some of them (heavy distillates) are not very much useful as a fuel when compared to light distillates. So there is a need for subsequent conversion of heavy distillates to light distillates. This can be obtained by altering the molecular structure of hydrocarbons in heavy distillates. One of the ways of accomplishing this change is by ‘Cracking’, a process that breaks the high boiling point petroleum fractions

PAFC is commercially fuelled cell that promoted to be future energy requirement .Therefore, the fuel needed to fill in the fuel Production of fuel from MSW is similar with biomass only vary in composition but after removal the non-organic. The reaction of converting the MSW is exothermically occur at 50-100 atm and copper, aluminium and zinc oxide is used as based catalyst (Chen,1995). The CO2 is needed to activate the catalyst. Generally, before MSW is used as feedstock it firstly will go through