Light-off and cumulative emissions in catalytic monoliths with nonuniform catalyst loading

Industrial and Engineering Chemistry Research

Volumn 43, Issue 16, 2004, Pages 4668-4690

  Ramanathan, Karthik ^a   West, David H ^b   Balakotaiah, Vemuri ^a  

^a University of Houston   (United States)

^b DOW CHEMICAL COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

DIFFUSION; IGNITION; INDUSTRIAL EMISSIONS; INTAKE SYSTEMS; REACTION KINETICS;

CATALYTIC MONOLITHS; CUMULATIVE EMISSIONS; EXOTHERMIC REACTIONS; WASHCOAT DIFFUSION;

CATALYST ACTIVITY;

CATALYST;

ARTICLE; CATALYST; CONDUCTANCE; DIFFUSION; EXHAUST GAS; GEOMETRY; PROCESS DESIGN; REACTOR;

EID: 3543020921     PISSN: 08885885     EISSN: None     Source Type: Journal    
DOI: 10.1021/ie034131v     Document Type: Article

References (23)

1. Becker, E. G., Pereira, C. J., Eds. Computer aided design of catalysts; Marcel Dekker Inc.: New York, 1993.
2. Hayes, R. E.; Kolaczkowski, S. T. Introduction to catalytic combustion; Gordon and Breach Science Publishers: Amsterdam, The Netherlands, 1997.
3. Cybulski, A.; Moulijn, J. A. Monoliths in heterogeneous catalysis. Catal. Rev.-Sci. Eng. 1994, 36, 179.
4. Groppi, G.; Tronconi, E.; Forzatti, P. Mathematical models of catalytic combustors. Catal. Rev.-Sci. Eng. 1999, 41, 227.
5. Oh, S. H.; Cavendish, J. C. Transients of monolithic catalytic converters: responses to step changes in feed stream temperature as related to controlling automobile emissions. Ind. Eng. Chem. Prod. Res. Dev. 1982, 21, 29.
6. Groppi, G.; Belloli, A.; Tronconi, E.; Forzatti, P. A comparison of lumped and distributed models of monolithic catalytic combustors. Chem. Eng. Sci. 1995, 50, 2705.
7. Tronconi, E.; Forzatti, P. Adequacy of lumped parameter models for SCR reactors with monolithic structures. AIChE J. 1992, 38, 201.
8. Eigenberger, G. On the dynamic behavior of the catalytic fixed-bed reactor in the region of multiple steady states-I. The influence of heat conduction in two phase models. Chem. Eng. Sci. 1972, 27, 1909.
9. Kirchner, T.; Eigenberger, G. On the dynamic behavior of automotive catalysts. Catal. Today 1997, 38, 3.
10. Please, C. P.; Hagan, P. S.; Schwendeman, D. W. Light-off behavior of catalytic converters. SIAM J. Appl. Math. 1994, 54, 72.
11. Leighton, D. T.; Chang, H.-C. A theory for fast igniting catalytic converters. AIChE J. 1995, 41, 1898.
12. Keith, J. M.; Chang, H.-C.; Leighton, D. T. Designing a fast-igniting catalytic converter system. AIChE J. 2001, 47, 650.
13. Kirchner, T.; Eigenberger, G. Optimization of the cold-start behavior of automotive catalysts using an electrically heated pre-catalyst. Chem. Eng. Sci. 1996, 51, 2409.
14. Ramanathan, K.; Balakotaiah, V.; West, D. H. Light-off criterion and transient analysis of catalytic monoliths. Chem. Eng. Sci. 2003, 58, 1381.
15. Psyllos, A.; Philippopoulos, C. Modelling of monolithic converters with axial catalyst distribution. Appl. Math. Model. 1993, 17, 459.
16. Cominos, V.; Gavriilidis, A. Theoretical investigation of axially non-uniform catalytic monoliths for methane combustion. Chem. Eng. Sci. 2001, 56, 3455.
17. Ramanathan, K.; Balakotaiah, V.; West, D. H. Bifurcation analysis of catalytic monoliths with nonuniform catalyst loading. Ind. Eng. Chem. Res. 2003, in press.
18. Tronci, S.; Baratti, R.; Gavriilidis, A. Catalytic converter design for minimisation of cold-start emissions. Chem. Eng. Commun. 1999, 173, 53.
19. Gupta, N.; Balakotaiah, V. Heat and mass transfer coefficients in catalytic monoliths. Chem. Eng. Sci. 2001, 56, 4771.
20. Balakotaiah, V.; West, D. H. Shape normalization and analysis of the mass transfer controlled regime in catalytic monoliths. Chem. Eng. Sci. 2002, 57, 1269.
21. Shah, R. K; London, A. Laminar Forced Convection in Ducts; Academic: New York, 1978.
22. Dommeti, S. M. S.; Balakotaiah, V.; West, D. H. Analytical criteria for validity of pseudohomogeneous models of packed-bed catalytic reactors. Ind. Eng. Chem. Res. 1999, 38, 767.
23. Ramanathan, K.; West, D. H.; Balakotaiah, V. Geometry effects on ignition in catalytic monoliths. AIChE J. 2003, in press.