mass transfer in three phase fluidized beds

... Solar drying systems: Simulations and optimization, Agrotech Publishing Academy, Udaipur, pp 131-133 Haghighi K., Segerlind L.J, (1988), Modeling Simultaneous Heat and Mass Transfer in Isotropic ... Trans ASEA, pp 31 Husain A., Chen C.S., Clayton J T, Whitney L.F (1972), Mathematical Simulation of Mass and Heat Transfer in High Moisture Foods, Trans ASAE, pp 55-59 224 Husain A., Chen C.S., Clayton ... C.S., Clayton J T (1973), Simultaneuos Heat and Mass Diffusion in Biological Material, Trans ASAE, pp 69-73 Luikov, A V (1980), Heat and mass transfer, Mir Publisher, Moscow Peebles E D, Christopher...

Ngày tải lên: 28/08/2013, 08:31

... Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Mass Transfer in Chemical Engineering ... Wesselingh, J.A., The Maxwell – Stefan approach to mass transfer, Chemical Engineering Science, 52, (1997), 861 – 911 [5] Levenspiel, O., Modeling in chemical engineering, Chemical Engineering ... in different scientific and engineering fields such as medicine, textile industry, membrane separations, packaging in food industry, extraction of solvents and of contaminants, and etc Mass transfer...

Ngày tải lên: 16/02/2014, 19:20

... eStudio Calamar, Berlin/Figueres Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) Contents Treatment of Rising Damp in Historical Buildings ... capillarity In most cases, these three mechanisms account for variations in moisture content in building Treatment of Rising Damp in Historical Buildings w max w kg/m3 Capillary domain w cr Monomolecular ... dependant on the surface finishing materials and furnishing According to the principle, a hygroscopic inertia index was defined as a single number, representing the hygroscopic inertia of a room and that...

Ngày tải lên: 31/03/2014, 16:20

... earthing impedance of a station according to Equation (16) Z ETtot Total earthing impedance of the short circuited tower according to Equation (21) ZP Driving point impedance of an infinite chain ... short circuit in high-voltage three- phase AC systems operating at nominal frequency 50 Hz or 60 Hz, i.e a) currents during two separate simultaneous line-to-earth short circuits in isolated neutral ... on the following documents: FDIS Voting report 73/127/FDIS 73/128/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above...

Ngày tải lên: 04/04/2014, 11:58

... (single -phase two-winding) (three- phase two-winding) (single -phase three- winding and single -phase two-winding) (single -phase three- winding) Vl V √l Vl V √l : √ : 3 Vl V √ and 2l In V √l Winding ... filter, in: PESC’88, April, 1988, pp 1151–1158 C.A Quinn, N Mohan, Active filtering of harmonic currents in three- phase, four-wire systems with three- phase and single -phase nonlinear loads, in: Proc ... 2) Cost of the compensator : Vl In In Vl In V √l : = 0.333Vl In Vl In √ = 0.577Vl In √ 3 + : Vl Vl In = 0.359Vl In No Lowest No : V √l : V √l In Vl In √ = 0.577Vl In No Low No Yes High Yes No Highest...

Ngày tải lên: 11/05/2014, 22:06

... Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Mass Transfer in Chemical Engineering ... Wesselingh, J.A., The Maxwell – Stefan approach to mass transfer, Chemical Engineering Science, 52, (1997), 861 – 911 [5] Levenspiel, O., Modeling in chemical engineering, Chemical Engineering ... coefficient of gas in oil phase is most practical problem in engineering project; the diffusion coefficients of gas in oil phase of the three diffusion tests are shown in fig.5 Fig indicates that...

Ngày tải lên: 18/06/2014, 22:20

... in different scientific and engineering fields such as medicine, textile industry, membrane separations, packaging in food industry, extraction of solvents and of contaminants, and etc Mass transfer ... unsteady-state mass transfer, since the amount of dye in the fiber is continuously increasing Following, Equation 8, was developed by Hill for describing the diffusion of dye molecules into an infinitely ... radius of filaments are presented in Fig As seen in Fig.3, decreasing in radius of filament causes increasing in the rate of saturating 1.1 1.0 0.9 0.8 ct/cinf 0.7 0.6 0.5 0.4 Radius of filament...

Ngày tải lên: 18/06/2014, 22:20

... walls A preliminary design of a packed column involves the following steps: Choice of packing; Column diameter estimation; 42 Mass Transfer in Chemical Engineering Processes Mass transfer coefficients ... the flooding point for the liquid phase mass transfer The values of φ and Ψ are packing parameters for the liquid and vapor phase mass transfer, respectively, and are graphically obtained In this ... (1970) 44 Mass Transfer in Chemical Engineering Processes Ref: Henley & Seader (1981) Fig Random packing: (a) plastic pall rings (b) metal pall rings (Metal Hypac) (c) Raschig rings (d) Intalox...

Ngày tải lên: 18/06/2014, 22:20

... with other researchers in the drying industry using mathematical 86 Mass Transfer in Chemical Engineering Processes modeling for the simulation of the drying mechanism in commercial dryers demonstrated ... structured packings Chemical Engineering and Processing, v 31, 2, pp 119 Xu, Z P., Afacan, A., Chuang, K T (2000) Predicting mass transfer in packed columns containing structured packings Trans IChemE, ... structured packings, Ind Eng Chem Res., v 47, pp 3274-3284 66 Mass Transfer in Chemical Engineering Processes Lévêque, J., Rouzineau, D., Prévost, M., Meyer, M (2009) Hydrodynamic and mass transfer...

Ngày tải lên: 18/06/2014, 22:20

... the energy exchange (transfer of kinetic energy) between the gas and solid phases 92 Mass Transfer in Chemical Engineering Processes The diffusion coefficient for the solid phase energy fluctuation ... by convective heat and mass transfer This initial stage of drying is known as the constant or unhindered drying period (CDP) As drying proceeds, internal moisture within the particle diffuses ... secondary phases such that the influence of the primary phase turbulence is the dominant factor in the random motion of the secondary phase 2.5.1 Continuous phase turbulence equations In the case...

Ngày tải lên: 19/06/2014, 08:20

... corrosion in the metallic parts at the interior of the engine The H2S is an inorganic acid that attacks the surface of metals when they are 134 Mass Transfer in Chemical Engineering Processes placed in ... capsaicin in n-hexane PCO 125 126 Mass Transfer in Chemical Engineering Processes (a) (b) Fig 3-D mesh plot (a) and contour plot (a) of the effects of extraction temperature and time on capsanthin in ... (2011) Recent advances in the study on capsaicinoids and capsinoids, European Journal of Pharmacology, Vol.650, 1-7 132 Mass Transfer in Chemical Engineering Processes Ying-Yue, W.; Chi-Tzong,...

Ngày tải lên: 19/06/2014, 08:20

... 140 Mass Transfer in Chemical Engineering Processes HA Henry’s constant of component A Molar concentration of component A in gas phase yA xA Mass concentration of component A in liquid phase ... monitored during the determination of the absorbing capacity of gas -phase components by liquid phase absorbers in the bubbling method Ac,CO2 (g CO2/kg amine) Figure shows that any of the amines solutions ... concentration during bubbling tests with MEA (left) and H2S and CO2 absorbing capacity of MEA and DEA as function of their concentration in water (right) 142 Mass Transfer in Chemical Engineering Processes...

Ngày tải lên: 19/06/2014, 08:20

... sustainable solution in this point of view In contrast to the energy-intensive interphase mass transfer processes as distillation and extraction, membrane separation is an intraphase -mass- transfer ... energy-intensive interphase mass transfer processes and less energy- or less material-intensive intraphase mass transfer processes (Henley & Seader, 1981) With environmental and energy constraints in ... coefficient relating to the distribution ratio (D) in Eq (4) and can be defined in terms of the mass transfer coefficient in liquid membrane (km) as Pm = Dkm (6) Three mass transfer resistances in Eq (5)...

Ngày tải lên: 19/06/2014, 08:20

... (cm3/mgmin) Feed- or aqueous -phase mass transfer coefficient or mass transfer ki coefficient in feed phase km Organic -phase mass transfer coefficient or mass transfer coefficient in liquid membrane phase ... Stripping -phase mass transfer coefficient or mass transfer coefficient ks in stripping phase L Length of the hollow fiber (cm) LMs Liquid membranes lif Feed interfacial film thickness Stripping interfacial ... Transport Through HFSLM in Engineering Applications phosphate and stripping solutions (mg/l) Amount of uranium remained in trisodium 35 30 29.86 Remained in TSP Remained in stripping solution 25 20...

Ngày tải lên: 19/06/2014, 08:20

... nitrogen transfer) 224 Mass Transfer in Chemical Engineering Processes Calculation was carried out with the same main parameters which were defined in previous section Fig 16(a) represents the influence ... e m b r a n e Gas phase  pCO x Hmem Hliq Hmem’ Fig 17 The scheme and coordinates of LM used in mathematical model 226 Mass Transfer in Chemical Engineering Processes The interaction of CO2 ... constants can be found in the literature and are presented in Table Thus, in addition to the CO2 transfer in the liquid phase it is necessary to take into account the transfer and interaction of carbonate...

Ngày tải lên: 19/06/2014, 08:20

... called as the mass burning rate, defined as mass transferred in unit area and time, is then determined by chemical kinetics and therefore the process is kinetically controlled In this kinetically ... Current (mA.m ) (b) Fig Effect of mass transfer area on performance of MFC 800 242 Mass Transfer in Chemical Engineering Processes of MFC Three different mass transfer area (3.14, 9and 16 cm2) ... 240 Mass Transfer in Chemical Engineering Processes In order to obtain the best oxidizer in cathode compartment, several oxidizers were analyzed Table summarized the optimum conditions obtained...

Ngày tải lên: 19/06/2014, 08:20

... with increasing velocity gradient Note here that in obtaining data in Figs 3(a) to 3(c), attention has been paid to controlling the surface temperature not to exceed 20 K from a given value In ... one from the viewpoint of gas -phase quasisteadiness in that its surface temperature changes at rates much slower than that of the gas phase, since solid phase has great thermal inertia For the outer, ... be determined by substituting the values of I, obtained from Eq (75), into Eq (66) It may be informative to note that for some weakly-burning situations, in which O2 concentrations in the reaction...

Ngày tải lên: 19/06/2014, 08:20

... rate first increases, then decreases abruptly, and again increases, with increasing Ts, as explained in the previous Section The ignition surfacetemperature observed is about 1800 K, in accordance ... within 3% error when the O2 mass- fraction YO, is 0.233 (cf Fig 2(b); Makino, et al., 1998b); for YO,=0.533, error is within 5%; for YO,=1, error is within 8% Examinations have been made in ... that in the room-temperature airflow by about 30%, because of the reduced mass- transfer rate of oxygen, due to thickened boundary layer (Makino, et al., 2003), through overcoming an increase in...

Ngày tải lên: 19/06/2014, 08:20

... transport in porous media where interphase mass transfer is important Mass and Heat Transfer During Two -Phase Flow in Porous Media - Theory and Modeling Mass and Heat Transfer During Two -Phase Flow in ... Pore-scale picture of interphase mass transfer x x Mass and Heat Transfer During Two -Phase Flow in Porous Media - Theory and Modeling Mass and Heat Transfer During Two -Phase Flow in Porous Media - ... kinetics 19 19 Mass and Heat Transfer During Two -Phase Flow in Porous Media - Theory and Modeling Mass and Heat Transfer During Two -Phase Flow in Porous Media - Theory and Modeling T l from interfacial...

Ngày tải lên: 20/06/2014, 06:20

... convection in porous media, Int J Heat Mass Transfer 30: 143–150 Solute Transport With Chemical Reaction Single- and Multi -Phase Flow in in Porous Media Solute TransportWith Chemical Reaction in in Singleand ... boundaries in porous media, Int J Heat Mass Transfer 36: 1357–1365 Udell, K S (1985) Heat transfer in porous media considering phase change and capillarity – the heat pipe effect, Int J Heat Mass Transfer ... the toughness a c scaling model between cracks having different constraint Nuclear Engineering and Design, Vol 235, 1889–1896 18 66 Mass Transfer Mass Transfer in Multiphase Systems and its...

Ngày tải lên: 20/06/2014, 06:20