Artículos de revistas
Numerical Simulation To Evaluate The Effect From Pre-polymerization On The Behavior Of Tubular Reactors [simulação Numérica Aplicada Para Avaliar O Efeito Da Pré-polimerização No Comportamento De Reatores Tubulares]
Registro en:
Polimeros. , v. 17, n. 3, p. 250 - 257, 2007.
1041428
2-s2.0-37249039943
Autor
Nogueira A.L.
Machado R.A.F.
Quadri M.B.
Lona L.M.F.
Institución
Resumen
The present study uses a phenomenological model to simulate a continuous, two-stage polymerization process. This system is composed by a continuous stirred tank reactor (CSTR) for monomer pre-polymerization (first stage), connected to a tubular reactor (second stage) to carry out the reaction up to high conversion values. A comprehensive non-iso-thermal 2-D model (axial and radial variations) was used to predict the tubular reactor behavior. A polymer characterization model was also developed to provide estimates of the polymer average molecular weight and polydispersity. According to the results, polymerization reactions carried out in a continuous two-stage system provide a polymer with less heterogeneous properties than the one obtained in a single tubular reactor. Besides, it is possible to produce a more homogeneous polymer increasing the viscosity of the mixture fed in the tubular reactor. 17 3 250 257 McGreavy, C., (1994) Polymer Reactor Engineering, , 1st ed, VCH Publishers, New York Cabral, P. A. Melo, P. A. Biscaia Jr., E. C. Lima, E. L. & Pinto, J. C. - Polym. Eng. Sci., 43, 6, p.1163 (2003);Tien, N.-K. Flaschel, E. & Renken, A. - Polymer Reaction Engineering - Influence of Reaction Engineering on Polymer Properties, Hanser Publishers (1983);Chen, C.C., (1994) Polym. Plast. Technol. Eng, 33 (1), p. 55 Lynn, S., Huff, J.E., (1971) AIChe J, 17 (2), p. 475 Husain, A., Hamielec, A.E., (1976) AIChe Symp. Series, 72 (160), p. 112 Nogueira, A.L., Lona, L.M.F., Machado, R.A.F., (2004) J. Appl. Pol. Sci, 91, p. 871 Soroush, M., Kravaris, C., (1993) AIChe J, 39, p. 1920 Marten, F.L., Hamielec, A.E., (1982) J. Appl. Pol. Sci, 27, p. 489 Stevens, C.J., Mathematical Modeling of Bulk and Solution Free Radical Polymerization in Tubular Reactors (1988), Ph.D. Thesis, University of Winscosin, Madison, EUAHui, A., Hamielec, A.E., (1968) J. Pol. Sci, 25, p. 167 Hamer, J.W., Ray, W.H., (1986) Chem. Eng. Sci, 41 (12), p. 3083 Holman, J.P., (1963) Heat Transfer, , Mc Graw Hill, New York Chen, C.C., Nauman, E.B., (1989) Chem. Eng. Sci, 44 (1), p. 179 Cutter, L. A. & Drexler, T. D. - Comp. Appl. Pol. Sci., p.13 (1982);Hui, A., Hamielec, A.E., (1972) J. Appl. Pol. Sci, 16, p. 749 Husain, A., Hamielec, A.E., (1978) J. Appl. Pol. Sci, 22, p. 1207 Kricheldorf, H.R., (1992) Handbook of Polymer Synthesis, , Marcel Dekker, New York McLaughlin, H. S. Mallikarjun, R. & Nauman, E. B. - AIChe J., 32, 3, p.419 (1986);Wyman, C.E., Carter, L.F., (1976) AIChe Symp. Ser, 72 (160), p. 1 Powell, F.E., Brooks, B.W., (1995) Chem. Eng. Sci, 50 (5), p. 837 Soliman, M. A. Aljarboa, T. & Alahmad, M. - Polym. Eng. Sci., 34, p.1464 (1994);Tossun, G., (1992) AIChe J, 38, p. 425