§ 3 5 mass transfer in turbulent flow

... Vol .34 , No 2, (January 1996), pp 2 83- 2 95, ISSN 0887-6266 Vergnaud, J M (1991) Liquid Transport Processes in Polymeric Materials: Modeling and Industrial Applications, Prentice Hall, 0- 13- 53 8 3 15 -3, ... 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 ... model in packed columns containing structured packing Shi and Mersmann’s (19 85) correlation for sheet metal structured packings can be written: 29.12  WeL FrL  S0 . 35 9 ae  FSE ( 35 ) 0 .3 ap ReL2...

Ngày tải lên: 18/06/2014, 22:20

... Fluid Mech 19 83, 130 , 187 - 202 [11] Ding, J.; Gidaspow, D A bubbling fluidization model using kinetic theory of granular flow AIChE J 1990, 36 (4), 5 23 - 53 8 [12] Gidaspow, D Multiphase Flow and Fluidization ... 1 855 , 94, 59 - 86 [ 23] FLUENT 6 .3 User’s Guide Fluent Incorporated, Lebanon, NH, 2006 [24] Hinze, J O Turbulence McGraw-Hill Publishing Co., New York, 19 75 110 Mass Transfer in Chemical Engineering ... 0.01  Re s  1 .5 x  0.8 83  0.906ln  Re s   0.025ln  Res  Cd  64  Re s   0. 138 Re  for 1 .5  Re 0.792 s s (5)  133 ln C d  2. 0 35 1  1.66 ln Re s  ln Re s  0. 030 6 ln Res for 40...

Ngày tải lên: 19/06/2014, 08:20

... 0. 25 and 0 .5 mass % et Solids concentration 0 5% vol increases 1 .5 times 5 10% vol Decreases 0– 15 mass % 6 65 μm, 1 .30 0 15 50 mass % μm 5. 7 μm 5. 5 μm 3. 7 μm 0.16 25 cm3, 0. 65 cm3, 1.46 25 cm3 14 Kiełbus ... particles Turbine with flat blades; D [m] Operating parameters n = 12 .5- 50 1/s; wog = 10 -3- 10-2 m/s; 0.1 X = 0. 25, 0 .5 mass% n = 8 .33 - 13. 33 1/s; 0.1 45 d/D = 0 .5 Vg = 0. 139 2.78 x10-4 m3/s ; X ≤ 10 ... ; PG-L/VL ∈ ; wog ∈ No Impeller A B C ±Δ, % Rushton Turbine CD A 31 5 0.029 0.028 0.122 0.44 0 .37 4 0. 432 0. 53 4 0.622 0.79 3. 7 3. 3 5. 2 Table...

Ngày tải lên: 20/06/2014, 06:20

... Modeling of and Massand Mass in Gas-Liquid Contacting Systems Systems 1 53 1 53 Fundamentals and Engineering Concepts for Ozone Reactor Design INSA, Toulouse 1 -3 Mars, pp 30 7 -31 0 Chahed J.; Colin C & Masbernat ... Minerals Engineering, Vol 10, N° 4, pp 36 7 -37 9 Higbie, R (1 9 35 ) The rate of absorption of a pure gas into a still liquid during short periods of exposure Trans A.I.Ch.E, Vol 31 , pp 36 5 -38 8 Hinze ... generating line, ϕ = 80° ; b – (1) Internal generating line, ϕ = 45 ; (2) middle generating line, ϕ = 63 ; (3) external generating line, ϕ = 63 The character of relationship between the local mass...

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... Heat Transfer in High Moisture Foods, Trans ASAE, pp 55 -59 224 Husain A., Chen C.S., Clayton J T (19 73) , Simultaneuos Heat and Mass Diffusion in Biological Material, Trans ASAE, pp 69- 73 Luikov, ... (32 ) Năng lợng sinh trình phát triển phôi đợc xác định theo khối lợng trứng hệ số sinh nhiệt phôi: & QP = (1 ) drT hP A.y (33 ) Thay phơng trình (31 ), (32 ) (33 ) vào phơng trình (30 ) nhận đợc phơng ... Segerlind L.J, (1988), Modeling Simultaneous Heat and Mass Transfer in Isotropic Sphere, Trans ASEA, pp 31 Husain A., Chen C.S., Clayton J T, Whitney L.F (1972), Mathematical Simulation of Mass...

Ngày tải lên: 28/08/2013, 08:31

... 1.17 43 2.18 83 4.9 054 2. 731 2 1.6908 1 .57 11 3. 9898 4.61 65 1 .36 11 1 .50 17 4 .50 18 2. 638 9 1. 959 6 1.8674 67.14 75 32 . 233 1 16.1098 17.0647 68. 239 3 43. 0661 23. 1940 23. 657 2 13. 62 71.78 36 3.2 255 11. 53 61 232 .8 ... 0.1 155 0.1208 0.1084 0.12 25 0.1 0 35 0.1274 0.1981 0 .37 24 0.1666 0.17 15 0. 159 4 0.2 431 0.1499 0.1 856 0.4111 0. 954 0 0 .31 45 0. 452 0 0. 454 5 0. 455 4 0.2 850 0 .38 51 0 .30 91 0. 756 0 0.2260 0 . 35 94 0 . 35 94 0 .56 11 ... 0.0 231 0.10 65 0. 039 7 0.2481 0.1208 0 .37 24 0.17 15 0. 954 0 0. 452 0 0. 756 0 0 . 35 94 5. 6477 2.6848 5. 6401 2.2140 7.14 65 3. 57 59 5. 251 5 2.18 83 4.61 65 1 .50 17 32 . 233 1 17.0647 71.78 255 821.9 8 25 N2 —— 10.8768...

Ngày tải lên: 16/02/2014, 19:20

... (°C) HI1 HI2 HI3 0–8 8–24 0–8 8–24 0–8 8–24 Table Flux chamber tests results RH (%) Rph (h-1) Samples 23 23 23 23 23 23 80 40 80 40 80 40 0 .5 – 0 .5 0. 75 m2 GP 0 .5 0. 75 m2 GPPaint Ensaio RHm (%) ... Hygroscopic Inertia Table Parameters for hygroscopic inertia analysis 43 Simulations Ih,d (g/(m3.%RH)) AMDR (%) SG: 1-11- 15- 19- 23- 27 SG2 SG12 SG16 SG20 SG24 SG28 0. 438 0. 438 0. 438 0. 438 0.6 53 1 .32 6 1.0 ... controlling temperature in the range 15 35 °C and RH in the range 30 –90% That control can be done using fixed values or using programmable cycles including variation of one or both parameters A continuous...

Ngày tải lên: 31/03/2014, 16:20

... 1.17 43 2.18 83 4.9 054 2. 731 2 1.6908 1 .57 11 3. 9898 4.61 65 1 .36 11 1 .50 17 4 .50 18 2. 638 9 1. 959 6 1.8674 67.14 75 32 . 233 1 16.1098 17.0647 68. 239 3 43. 0661 23. 1940 23. 657 2 13. 62 71.78 36 3.2 255 11. 53 61 232 .8 ... 0.1 155 0.1208 0.1084 0.12 25 0.1 0 35 0.1274 0.1981 0 .37 24 0.1666 0.17 15 0. 159 4 0.2 431 0.1499 0.1 856 0.4111 0. 954 0 0 .31 45 0. 452 0 0. 454 5 0. 455 4 0.2 850 0 .38 51 0 .30 91 0. 756 0 0.2260 0 . 35 94 0 . 35 94 0 .56 11 ... 0.0 231 0.10 65 0. 039 7 0.2481 0.1208 0 .37 24 0.17 15 0. 954 0 0. 452 0 0. 756 0 0 . 35 94 5. 6477 2.6848 5. 6401 2.2140 7.14 65 3. 57 59 5. 251 5 2.18 83 4.61 65 1 .50 17 32 . 233 1 17.0647 71.78 255 821.9 8 25 N2 —— 10.8768...

Ngày tải lên: 18/06/2014, 22:20

... (March 19 93) , pp 114611 53 , ISSN 0 032 -38 61 38 Mass Transfer in Chemical Engineering Processes Flory, P J (19 53 ) Principle of Polymer Chemistry, Cornell University Press, ISBN 0-8014-0 134 8, USA ... 0.04 0.02 0.00 38 00 36 00 34 00 32 00 30 00 2800 -1 Wavenumbers (cm ) Fig 11 Intensity (H2O/AC/PMMA system) 2600 2400 34 Mass Transfer in Chemical Engineering Processes transferred into the cell, ... 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 = 30 m Radius of...

Ngày tải lên: 18/06/2014, 22:20

... Effective mass- transfer area in a pilot plant column equipped with structured packings and with ceramic rings Industrial and Engineering Chemistry Research, v 33 , pp 647- 656 Brunazzi, E., Nardini, ... Selecting the proper distillation column packing Chemical Engineering Progress, v 66, 3, pp 39 Eckert, J S (19 75) How tower packings behave Chemical Engineering, v 82, pp 70 Ellis, 19 53 Fair, ... (2008) Seamless mass transfer correlations for packed beds bridging random and structured packings, Ind Eng Chem Res., v 47, pp 32 74 -32 84 66 Mass Transfer in Chemical Engineering Processes Lévêque,...

Ngày tải lên: 18/06/2014, 22:20

... 68 1 65 11.28 21. 63 19.12 68 1 65 118. 45 290.71 269.00 35 256 1 95. 85 30 3. 75 2 93. 46 Methanol 57 256 12 .38 26. 23 23. 73 57 256 158 .04 297.82 2 83. 10 45 1 65 178. 93 250 .71 210. 65 n-Hexane 56 256 5. 14 ... probability 4. 938 929 0.2821 13 0. 036 924* - 0.00 238 9 - 0.000 051 0.00 033 7 0.9702 0. 95 53 0.0000 Capsaicin (mg/100g) 16 .50 1 750 6.922010* 0 .32 4 730 - 0.08 733 0** - 0.001700** 0.012620*** 0. 939 1 0.9087 0.0000 ... 8.00 50 1 65 59.27 100.14 92.84 45 256 35 1 .32 155 4.66 1 054 .92 Table The optimum combined condition predicted values for dependent variables at optimal values of variables 128 Mass Transfer in Chemical...

Ngày tải lên: 19/06/2014, 08:20

... as shown in Table (Angersbach et al., 2002)  156 Mass Transfer in Chemical Engineering Processes Low frequency (kHz) Biological material High frequency (MHz) 3 3 5 ≥ 15 3 5 50 ≥ 25 Large cells ... 3. 5  P [inches H2O] 3. 0 2 .5 2.0 1 .5 1.0 P = 5E-05Qr2 - 0.001Qr + 0.498 0 .5 R² = 0.8 95 0.0 100 150 Qr 200 250 Fig Pressure drop along the absorption column as function of Qr Amine solution flow ... Pollution Engineering Manual, Wiley Interscience Publication, ISBN 9780-471 -33 333 -3 DePriest, W & Van Laar, J (1992) Engineering Evaluation of PRENFLO-based Integratedgasification-combined-cycle...

Ngày tải lên: 19/06/2014, 08:20

... 27-77 .5 4.6- 15. 5 0.1 03 5. 5-11 .5 0. 63- 1 .5 0 .39 2 0.102 The mass transfer in the membrane is the rate controlling step 34 - 53 . 1 22.1 0.0 13 The mass transfer in the membrane is the rate controlling ... stripping against the number of separation cycles 188 Mass Transfer in Chemical Engineering Processes 4.2 4.1 [Pr3+][H+ ]3 (mol/l) 3. 9 3. 8 y = 0.198x + 3. 12 3. 7 R2 = 0. 954 52 3. 6 3. 5 3. 4 3. 3 3. 2 ... 1 65 Mass Transfer Enhancement by Means of Electroporation -17 .5 a Intact PEF Freeze-thawed -18.0 ln Deff -18 .5 -19.0 -19 .5 -20.0 0.0028 0.0029 0.0 030 0.0 031 0.0 032 0.0 033 0.0 034 20 25 30 -1...

Ngày tải lên: 19/06/2014, 08:20

... uranium remained in trisodium 35 30 29.86 Remained in TSP Remained in stripping solution 25 20 14.46 15 10 8.07 7.92 5. 57 4 . 35 4. 53 2. 73 2.17 1. 73 Number of cycles 0.87 0.9 0.22 0 .38 Fig 15 Amount of ... concentrations of Aliquat 33 6 is shown in Fig 13 Percentage of uranium extraction (%) 45 40 35 D2EHPA 30 Aliquat 33 6 25 TOA 20 Cyanex 9 23 15 TBP 10 0 10 20 30 40 50 Time (min) Percentage of uranium ... 190 Mass Transfer in Chemical Engineering Processes 1.8 1.7 Experiment Separation factor 1.6 Calculation 1 .5 1.4 1 .3 1.2 1.1 0.9 0.8 15 30 45 60 75 90 1 05 120 1 35 Time (hour) Fig...

Ngày tải lên: 19/06/2014, 08:20

... oxygen: S =5. 79·10 -3 cm3(STP)/(cm3·cmHg), D=7.6·10-7 cm2/s, Р=4.4·10-9 cm3(STP)·cm/(cm3·s·cmHg); transport parameters for nitrogen: S =3. 06·10 -3 cm3(STP)/(cm3·cmHg), D =3. 6·10-7 cm2/s, Р=1.1·10-9 cm3(STP)·cm/(cm3·s·cmHg) ... Vol .30 8, No .3, pp 6 35 - 637 (In Russian) Beckman, I.; Shelekhin, A & Teplyakov, V (1991) Separation of gas mixtures in unsteadystate conditions J Membrane Sci., Vol .55 , pp 2 83- 297 Beckman, I (19 93) ... ( H liq , t ) x 0 (56 ) (57 ) 228 Mass Transfer in Chemical Engineering Processes Initial conditions: liq liq CCO ( x ,0)  CCO (58 ) liq liq CCO2 ( x ,0)  CCO2 (59 ) 2 3 liq liq C HCO  ( x...

Ngày tải lên: 19/06/2014, 08:20

... 1.94 6. 95 =μ = 12 .34 1.74 9. 13 (μ ) + 6.66 1.728 12.86 (7) 3. 64 1 .5 22.8 Table Biomass and substrate concentration in outlet of MFC at different HRT 244 Mass Transfer in Chemical Engineering Processes ... 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 ... Ts    ; ~ ~   T  Ts ( 43) Evaluating Eqs ( 35 ) and (36 ) at =0 for obtaining surface concentrations of O2 and CO2, and substituting them into Eq (31 ), we obtain an implicit expression for...

Ngày tải lên: 19/06/2014, 08:20

... Controlled Region Kinetics of C + CO2→ 2CO at 1200-1600°C Ind Eng Chem Fundam., Vol 16, No 2, pp 2 35 -242, ISSN 0196- 431 3  13 Mass Transfer Related to Heterogeneous Combustion of Solid Carbon in the Forward ... (/)]1/2, in Eq (8) also appears in the combustion rate defined in Eq (32 ) in Part 1, by use of the relation in Eq (2), as  m   j a      K ln 1   (9) 2 .3 Correction factor K and mass- transfer ... present flow configuration, after confirming its appropriateness, being examined by varying both the freestream velocity and graphite rod diameter that can exert influences in determining velocity...

Ngày tải lên: 19/06/2014, 08:20

... decrease in the 0.04 a (s-1) 33 00 33 00 820 T ∞ (K) a (s-1) 32 0 33 00 ◆ 1280 33 00 32 0 820 〇 Y A=0.01 △ Combustion rate , kg/(m ・s) 0. 03 2 Combustion rate , kg/(m ・s) 0. 03 0.04 T ∞ (K) △ 32 0 ◆ 1280 32 0 ... within 3% error when the O2 mass- fraction YO, is 0. 233 (cf Fig 2(b); Makino, et al., 1998b); for YO,=0. 53 3 , error is within 5% ; for YO,=1, error is within 8% Examinations have been made in ... ・s) 0.01 1000 150 0 2000 Surface tempareture , K (a) a (s ) 33 00 33 00 820 △ Y O=0.1 05, Y P=0.10 0.02 -1 T ∞ (K) 32 0 ◆ 1280 〇 32 0 a (s ) 33 00 33 00 820 0.02 ρC=1. 25 10 kg/m 0.01 1000 150 0 2000 Surface...

Ngày tải lên: 19/06/2014, 08:20

... 35 5 35 0 34 5 34 0 33 5 33 0 32 5 32 0 31 5 31 0 30 5 30 0 2 95 37 5 37 0 36 5 36 0 35 5 35 0 34 5 34 0 33 5 33 0 32 5 32 0 31 5 31 0 30 5 30 0 2 95 Fig 11 Temperatures of the phases after 17s using the interfacial area-based ... 2 .34 7E- 05 2 .34 6E- 05 2 .34 5E- 05 2 .34 4E- 05 2 .34 3E- 05 2 .34 2E- 05 2 .34 1E- 05 2 .34 8E- 05 2 .34 7E- 05 2 .34 6E- 05 2 .34 5E- 05 2 .34 4E- 05 2 .34 3E- 05 2 .34 2E- 05 2 .34 1E- 05 Fig 15 Mass fractions of air in water Left: interfacial-area-based ... classical model a Xsw2 2 .36 E- 05 2 .34 E- 05 2 .32 E- 05 2.3E- 05 2.28E- 05 2.26E- 05 2.24E- 05 2.22E- 05 2.2E- 05 2.18E- 05 2.16E- 05 2.14E- 05 Xl 2 .36 E.6 2.24E−6 Fig Mass fraction of air in the liquid phase after...

Ngày tải lên: 20/06/2014, 06:20

... γ = 0.0, N = −0.1) 14 36 Mass Transfer Mass Transfer in Multiphase Systems and its Applications 0 .58 Nux/(Rax^0 .5) 0 .54 0 .50 0.46 0.42 0.0 0 .5 1.0 1 .5 2.0 Le 2 .5 3. 0 3. 5 4.0 Fig Variation of ... boundaries in porous media, Int J Heat Mass Transfer 36 : 1 35 7– 136 5 Udell, K S (19 85) Heat transfer in porous media considering phase change and capillarity – the heat pipe effect, Int J Heat Mass Transfer ... Multi-Phase Flow Porous Media 13 35 Nux/(Rax^0 .5) 0. 436 0. 434 0. 431 0.429 0.426 0.0 0 .5 1.0 1 .5 2.0 Le 2 .5 3. 0 3. 5 4.0 Fig Variation of Nusselt number with Lewis number for various ζ (χ = 0.02, F0 = 0 .3, ...

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