Packed bed structure: Evaluation of radial particle distribution

A model describing the radial distribution of monosized spheres in randomly packed beds up to distances of about two particle diameters from the vessel wall is presented here. The model is based on the existence of a highly ordered layer of particles adjacent to the wall followed by a more diffuse,...

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Autor principal: Mariani, N.J
Otros Autores: Salvat, W.I, Martínez, O.M, Barreto, G.F
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Canadian Society for Chemical Engineering 2002
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100 1 |a Mariani, N.J. 
245 1 0 |a Packed bed structure: Evaluation of radial particle distribution 
260 |b Canadian Society for Chemical Engineering  |c 2002 
270 1 0 |m Barreto, G.F.; Departamento de Ingenieria Quimica, Facultad de Ingeniería, Universidad Nacional de La Plata, La Plata, Argentina; email: barreto@quimica.unlp.edu.ar 
506 |2 openaire  |e Política editorial 
504 |a Benenatti, R.F., Brosilov, C.B., Void fraction distribution in bed of spheres (1962) AIChE J., 8 (3), pp. 359-361 
504 |a Delmas, H., Froment, G.F., A simulation model accounting for structural radial nonuniformities in fixed bed reactors (1988) Chem. Eng. Sci., 43, pp. 2281-2287 
504 |a Giese, M., Rottschäfer, K., Vortmeyer, D., Measured and modelled superficial flow profiles in packed beds with liquid flow (1998) AIChE J., 44, pp. 484-490 
504 |a Goodling, J.S., Vachon, R.I., Stelpflug, W.S., Ying, S.J., Radial porosity in cylindrical beds packed with spheres (1983) Powder Techn., 35, pp. 23-29 
504 |a Govindarao, V.M.H., Froment, G.F., Voidage profile in packed beds of spheres (1986) Chem. Eng. Sci., 41, pp. 533-539 
504 |a Govindarao, V.M.H., Ramrao, K.V.S., Prediction of location of particles in the wall region of a randomly packed bed of spheres (1988) Chem. Eng. Sci., 43, pp. 2544-2545 
504 |a Govindarao, V.M.H., Ramrao, K.V.S., Rao, A.V.S., Structural characteristics of packed beds of low aspect ratio (1992) Chem. Eng. Sci., 47, pp. 2105-2109 
504 |a Legawiec, B., Ziólkowski, D., Structure, voidage and effective thermal conductivity of solids within near-wall region of beds packed with spherical pellets in tubes (1994) Chem. Eng. Sci., 49, pp. 2513-2520 
504 |a Mariani, N.J., Mazza, G.D., Martínez, O.M., Barreto, G.F., Evaluation of radial voidage profile in packed beds of low aspect ratios (2000) Can. J. Chem. Eng., 78, pp. 1133-1167 
504 |a Mariani, N.J., Mazza, G.D., Martínez, O.M., Barreto, G.F., The distribution of particles in cylindrical packed beds (1998) Trends in Heat, Mass and Momentum Transfer, 4, pp. 95-114 
504 |a Mariani, N.J., Martínez, O.M., Barreto, G.F., Computing radial packing properties from the distribution of particle centers (2001) Chem. Eng. Sci., 56, pp. 5693-5707 
504 |a Mueller, G.E., Radial void fraction distributions in randomly packed fixed beds of uniformly sized spheres in cylindrical containers (1992) Powder Techn., 72, pp. 269-275 
504 |a Press, W.H., Teukolsky, S.A., Vetterling, W.T., Flannery, B.P., (1992) "Numerical Recipes in Fortran", 2nd Ed., , Cambridge University Press, Cambridge, UK 
504 |a Ridway, K., Tarbuck, K.J., Radial voidage variation in randomly-packed beds of spheres of different sizes (1966) J. Pharm. Pharmac., 18 (SUPPL.), pp. 168S-175S 
504 |a Stewart, W.E., Caracotsios, M., Sorensen, J.P., Parameter estimation from multiresponse data (1992) AIChE J., 38 (5), pp. 641-650 
504 |a Winterberg, M., Tsotsas, E., Krischke, A., Vortmeyer, D., A simple and coherent set of coefficients for modelling of heat and mass transport with and without chemical reaction in tubes filled with spheres (2000) Chem. Eng. Sci., 55, pp. 967-979 
520 3 |a A model describing the radial distribution of monosized spheres in randomly packed beds up to distances of about two particle diameters from the vessel wall is presented here. The model is based on the existence of a highly ordered layer of particles adjacent to the wall followed by a more diffuse, but still identifiable, second layer. Expressions generated from simple geometrical concepts (intersection between a cylindrical surface and a sphere) straightforwardly allow calculating the radial voidage profile given the radial distribution of particle centers and vice versa. These expressions are employed to fit the model to measures of voidage profiles within a wide range of aspect ratios, a = (RT/Rp). The model can be used to accurately predict radial voidage profiles, but it is stressed that the identification of particle distribution constitutes more valuable information than an empirical expression for describing voidage variations.  |l eng 
593 |a Departamento de Ingenieria Quimica, Facultad de Ingeniería, Universidad Nacional de La Plata, La Plata, Argentina 
593 |a Departamento de Industrias, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina 
593 |a Ctro. Invest./Desarrollo Procesos C., CONICET, Universidad Nacional de La Plata, Calle 47 No. 257, La Plata, Argentina 
690 1 0 |a ASPECT RATIO 
690 1 0 |a BED STRUCTURE 
690 1 0 |a PARTICLE CENTER DISTRIBUTION 
690 1 0 |a VOIDAGE PROFILE 
690 1 0 |a ASPECT RATIO 
690 1 0 |a CHEMICAL REACTORS 
690 1 0 |a DIFFUSION 
690 1 0 |a FLUIDIZED BEDS 
690 1 0 |a PARTICLE DISTRIBUTION 
690 1 0 |a VOIDAGE VARIATIONS 
690 1 0 |a CHEMICAL ENGINEERING 
690 1 0 |a MICROSPHERE 
690 1 0 |a DISTRIBUTION 
690 1 0 |a MODEL 
690 1 0 |a PACKED BED 
690 1 0 |a PARTICLE DISPERSION 
690 1 0 |a ARTICLE 
690 1 0 |a ASPECT RATIO 
690 1 0 |a BED STRUCTURE 
690 1 0 |a CALCULATION 
690 1 0 |a DISPERSION 
690 1 0 |a EVALUATION 
690 1 0 |a GEOMETRY 
690 1 0 |a MEASUREMENT 
690 1 0 |a MODEL 
690 1 0 |a PACKED BED REACTOR 
690 1 0 |a PARTICLE SIZE 
690 1 0 |a PARTICULATE MATTER 
690 1 0 |a PREDICTION 
690 1 0 |a RADIAL PARTICLE DISTRIBUTION 
690 1 0 |a STRUCTURE ANALYSIS 
690 1 0 |a VOIDAGE PROFILE 
700 1 |a Salvat, W.I. 
700 1 |a Martínez, O.M. 
700 1 |a Barreto, G.F. 
773 0 |d Canadian Society for Chemical Engineering, 2002  |g v. 80  |h pp. 186-193  |k n. 2  |p Can. J. Chem. Eng.  |x 00084034  |t Canadian Journal of Chemical Engineering 
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