Estimated Calculation of Conversion Degree in Catalyst Bed Levels

Anita Kovac Kralj; PeterGlavic

Journal of Industrial and Engineering Chemistry, Vol.13, No.5, 723-728, September, 2007

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Estimated Calculation of Conversion Degree in Catalyst Bed Levels

Anita Kovac Kralj^†, and PeterGlavic

Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, Maribor, Slovenia

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Opportunities for increasing production depend very much on the reaction conversion rates (reaction kinetics and the catalyst used), and selectivity. This paper presents a study on mathematically calculating the degree of conversion regarding successive catalyst bed levels. If the amount fraction change of the key components are known then the ratio of the reacted amount fractions can be calculated between the catalyst bed levels and their degrees of conversion. Calculating the degree of conversion in the catalyst was tested in the case of a steam reforming reactor which produces synthesis gas for methanol production. In this case study, the calculation is in relatively good agreement with the leave experimental measurements of an existing methanol production plant.

Keywords:catalyst;degree of conversion;bed level;amount flow rate

[References]

Lange JP, Catal. Today, 64(1-2), 3 (2001)
Skrzypek J, Lachowska M, Moroz H, Chem. Eng. Sci., 46, 2809 (1991)
Graaf GH, Sijtsema PJJM, Stamhuis EJ, Joosten GEH, Chem. Eng. Sci., 41, 2883 (1986)
Skrzypek J, Sloczynski J, Ledakowicz S, Methanol Synthesis, Polish Scientific Publishing (1994)
Honken L, M. Sc. Thesis, Norwegian University of Science and Technology, Department of Chemical Engineering (1995)
Kordabadi H, Jahanmiri A, Chem. Eng. J., 108(3), 249 (2005)
Pompeo F, Nichio NN, Ferretti OA, Resasco D, Int. J. Hydrog. Energy, 30, 1399 (2005)
Rezaie N, Jahanmiri A, Moghtaderi B, Rahimpour MR, Chem. Eng. Process., 44, 911 (2005)
Smith JM, Chem. Eng. Kinetics, McGraw-Hill Book, pp. 350-355 (1981)
Kovac Kralj A, Glavic P, Kravanja Z, Comput. Chem. Eng., 24, 125 (2000)

[1] Lange JP, Catal. Today, 64(1-2), 3 (2001)

[2] Skrzypek J, Lachowska M, Moroz H, Chem. Eng. Sci., 46, 2809 (1991)

[3] Graaf GH, Sijtsema PJJM, Stamhuis EJ, Joosten GEH, Chem. Eng. Sci., 41, 2883 (1986)

[4] Skrzypek J, Sloczynski J, Ledakowicz S, Methanol Synthesis, Polish Scientific Publishing (1994)

[5] Honken L, M. Sc. Thesis, Norwegian University of Science and Technology, Department of Chemical Engineering (1995)

[6] Kordabadi H, Jahanmiri A, Chem. Eng. J., 108(3), 249 (2005)

[7] Pompeo F, Nichio NN, Ferretti OA, Resasco D, Int. J. Hydrog. Energy, 30, 1399 (2005)

[8] Rezaie N, Jahanmiri A, Moghtaderi B, Rahimpour MR, Chem. Eng. Process., 44, 911 (2005)

[9] Smith JM, Chem. Eng. Kinetics, McGraw-Hill Book, pp. 350-355 (1981)

[10] Kovac Kralj A, Glavic P, Kravanja Z, Comput. Chem. Eng., 24, 125 (2000)