论文信息 - Modeling of chemical reactors — XVII Steady state axial heat and mass transfer in tubular reactors Numerical investigation of multiplicity

Modeling of chemical reactors — XVII Steady state axial heat and mass transfer in tubular reactors Numerical investigation of multiplicity

Abstract Numerical results are presented in graphical form for a range of parameters where multiple solutions may occur. These results provide valuable material for a further theoretical examination of multiplicity. It is also shown that in multiple cases the Danckwerts boundary conditions are consistent with stirred tank and piston flow respectively. Possibilities of an existence of multiplicity at high Peclet numbers are discussed. On the base of a simple analysis an estimation of the coordinates of a trifurcation point is developed, which together with a range of Damkohler numbers were multiplicity can occur are compared with the exact values. It is shown that these criteria are remarkably good. A discussion of the effects of axial mixing in the industrial adiabatic packed beds is presented.

Hanns Hofmann | H. Hofmann | V. Hlavácˇek | V. Hlavácˇek

[1] N. Amundson,et al. Uniqueness of the steady state solutions for chemical reactor occurring in a catalyst particle or in a tubular reaction with axial diffusion , 1967 .

[2] Hanns Hofmann,et al. Modeling of chemical reactors — XVI Steady state axial heat and mass transfer in tubular reactors An analysis of the uniqueness of solutions , 1970 .

[3] V. Hlaváček,et al. Axialer stoff- und Wärmetransport im adiabatischen Rohrreaktor—II. Numerische Untersuchung—Ablauf einer einfachen Reaktion bezw. einer Folgereaktion , 1966 .

[4] G. Padberg,et al. Stabiles und instabiles Verhalten eines adiabatischen Rohrreaktors am Beispiel der katalytischen CO-Oxydation , 1967 .