Adsorption with chemical reaction in porous catalyst pellets under alternate concentration fields. Uniform temperature case

• Autorzy: Bizon K. , Tabiś B.

Identyfikatory

DOI

10.1515/cpe-2016-0039

• Języki publikacji: EN

Abstrakty

EN

The work concerns the dynamic behaviour of a porous, isothermal catalyst pellet in which a simultaneous chemical reaction, diffusion and adsorption take place. The impact of the reactant adsorption onto the pellet dynamics was evaluated. A linear isotherm and a non-linear Freundlich isotherm were considered. Responses of the pellet to sinusoidal variations of the reactant concentration in a bulk gas were examined. It was demonstrated that the dynamics of the pellet is significantly affected both by accounting for the adsorption and by the frequency of the bulk concentration variations. The sorption phenomenon causes damping of the concentration oscillations inside the pellet and damping of its effectiveness factor oscillations. Depending on the frequency of the concentration oscillations in the bulk, the remarkable oscillations can involve an entire volume of the pellet or its portion in the vicinity of the external surface.

Słowa kluczowe

EN

catalyst pellets; reaction; diffusion; adsorption; dynamics

PL

peleta katalityczna; reakcja; dyfuzja; adsorpcja; dynamika

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2016
• Tom: Vol. 37, nr 4
• Strony: 473--484
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Bizon K.

• Cracow University of Technology, Department of Chemical and Process Engineering, ul. Warszawska 24, 31-155 Kraków, Poland

autor

Tabiś B.

• Cracow University of Technology, Department of Chemical and Process Engineering, ul. Warszawska 24, 31-155 Kraków, Poland

Bibliografia

• 1. Burghardt A., Berezowski M., 2003. Periodic solutions in a porous catalyst pellet - Homoclinic orbits. Chem. Eng. Sci., 58, 2657-2670. DOI: 10.1016/S0009-2509(03)00120-9.
• 2. Dietrich W., Lawrence P.S., Grünewald M., Agar D.W., 2005. Theoretical studies on multifunctional catalysts with integrated adsorption sites. Chem. Eng. J., 107, 103–111. DOI: 10.1016/j.cej.2004.12.016.
• 3. Gear C. W., 1971. Algorithm 407: DIFSUB for solution of ordinary differential equations [D2]. Mag. Commun. ACM, 14, 185-190. DOI: 10.1145/362566.362573.
• 4. Grünewald M., Agar D.W., 2004. Enhanced catalyst performance using integrated structured functionalities. Chem. Eng. Sci., 59, 5519–5526. DOI: 10.1016/j.ces.2004.07.072.
• 5. Il’in A., Luss D., 1992. Wrong-way behavior of packed bed reactors: Influence of reactant adsorption on support. AIChE J., 38, 1609-1617. DOI: 10.1002/aic.690381011.
• 6. Lee H.H., 1985. Heterogeneous reactor design. Butterworth Publishers, Boston – Toronto.
• 7. Lugo E.L., Wilhite B.A., 2016. A theoretical comparison of multifunctional catalyst for sorption-enhanced reforming process. Chem. Eng. Sci., 150, 1–15. DOI: 10.1016/j.ces.2016.04.011.
• 8. Luss D., 1974. The influence of capacitance terms on the stability of lumped and distributed parameter systems. Chem. Eng. Sci., 29, 1832-1836. DOI: 10.1016/0009-2509(74)87045-4.
• 9. Ray W.H., Hastings S.P., 1980. The influence of the Lewis number on the dynamics of chemically reacting systems. Chem. Eng. Sci., 35, 589-595. DOI: 10.1016/0009-2509(80)80007-8.
• 10. Seydel R., 2010. Practical bifurcation and stability analysis. Springer, New York London.
• 11. Shampine L. F., 1994. ODE solvers and the method of lines. Numer. Methods Partial Differential Eq. 10, 739-755. DOI: 10.1002/num.1690100608.
• 12. Szarawara J., Skrzypek J., 1980. Podstawy inżynierii reaktorów chemicznych. WNT, Warszawa.
• 13. Szukiewicz M. K., 2002. An approximate model for diffusion and reaction in a porous pellet. Chem. Eng. Sci., 57, 1451-1457. DOI: 10.1016/S0009-2509(02)00055-6.