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T. Viveros García ; J. A. Ochoa Tapia ;Revista Mexicana de Ingeniería Química 2003, 2 3

Author: J. O. Marroquín de la Rosa

Source: http://www.redalyc.org/


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Revista Mexicana de Ingeniería Química ISSN: 1665-2738 amidiq@xanum.uam.mx Universidad Autónoma Metropolitana Unidad Iztapalapa México Marroquín de la Rosa, J.
O.; Viveros García, T.; Ochoa Tapia, J.
A. Approximate isothermal global effectiveness factor Revista Mexicana de Ingeniería Química, vol.
2, núm.
3, 2003, pp.
183-191 Universidad Autónoma Metropolitana Unidad Iztapalapa Distrito Federal, México Available in: http:--www.redalyc.org-articulo.oa?id=62020309 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative REVISTA MEXICANA DE INGENIERÍA QUÍMICA Vol.
2 (2003) 183-191 AMIDIQ APPROXIMATE ISOTHERMAL GLOBAL EFFECTIVENESS FACTOR APROXIMACION ISOTERMICA DEL COEFICIENTE GLOBAL DE EFECTIVIDAD J.
O.
Marroquín de la Rosa, 1, T.
Viveros-García 2 and J.
A.
Ochoa-Tapia2* 1 2 Instituto Mexicano del Petróleo.
Eje Central Lázaro Cárdenas 152 Universidad Autónoma Metropolitana-Iztapalapa.
Depto de I.P.H., Av.
San Rafael Atlixco 186, Col.
Vicentina.
C.P.
09340, México, D.F. Abstract An approximate method to evaluate global effectiveness factor has been developed.
It results from the inclusion of external mass transfer in an earlier method, which considered intraphase effectiveness factor estimations.
The method, based on the approximation of the reaction rate above the surface concentrations, requires only the solution of an algebraic equation, instead of solving the differential one that defines the original diffusion reaction boundary value problem.
The method can be applied to any kinetic expression.
For the second order example presented, the error of the approximate global effectiveness factor with respect to the exact values is less than 15 % and turns asymptotic as the Thiele modulus becomes large. Keywords: appr...





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