Chemical Engineering

Download Chemical and Catalytic Reactor Modeling by Milorad P. Duduković and Patrick L. Mills (Eds.) PDF

By Milorad P. Duduković and Patrick L. Mills (Eds.)

content material: Trickling and pulsing transition in cocurrent downflow trickle-bed reactors with targeted connection with large-scale columns / D.M. Dimenstein, S.P. Zimmerman, and K.M. Ng --
impression of the reactional approach at the irrigation cost in trickle-bed reactors / P. Ruiz, M. Crine, A. Germain, and G. L'Homme --
A comparability of present versions for isothermal trickle-bed reactors : program to a version response process / P.L. generators and M.P. Duduković --
balance of trickle-bed reactors / C.H. Barkelew and B.S. Gambhir --
fuel absorption with advanced chemical reactions : a normal computational scheme for expense calculations / P.A. Ramachandran --
Modeling of gas-liquid continuous-stirred tank reactors (CSTRs) / A.A. Shaikh and A. Varma --
The impact of fuel and liquid velocities and good dimension on good suspension in a three-phase bubble column reactor / Barry W. Brian and Paul N. Dyer --
Bubble habit in a slurry bubble column reactor version / D.N. Smith, W. Fuchs, R.J. Lynn, D.H. Smith, and M. Hess --
A two-bubble category version for churn turbulent bubble column slurry reactor / S. Joseph and Y.T. Shah --
Mathematical modeling of cross-flow, stable kingdom electrochemical reactors / P.G. Debenedetti, C.G. Vayenas, I. Yentekakis, and L.L. Hegedus --
Modeling of chemical vapor deposition reactors for the fabrication of microelectronic units / Klavs F. Jensen --
Multicomponent diffusion and response in porous catalysts / Henry W. Haynes, Jr. --
research of fixed-bed catalytic reactor versions / S.I. Pereira Duarte and N.O. Lemcoff --
The optimum layout of a reactor for the hydrogenation of butyraldehyde to butanol / J.B. Cropley, L.M. Burgess, and R.A. Loke --
difficulties within the layout of the countercurrent moving-bed catalytic reactor : a geometrical process / Dimitry Altshuller --
Optimization in tubular reactor structures / E.B. Nauman and Ramesh Mallikarjun --
secure layout of cooled tubular reactors for exothermic a number of first order reactions / K.R. Westerterp, K.J. Ptasinsky, and R.R.M. Overtoom --
balance of adiabatic reactors / C.H. Barkelew --
basic deactivation facts from laboratory reactors / Eugene E. Petersen and Michael A. Pacheco --
Poisoning results in temperature-increased fixed-bed reactor operation : a comparability of experimental effects and version simulation / George J. Frycek and J.B. Butt --
Modeling of tubular nonisothermal nonadiabatic packed-bed reactors with catalyst poisoning / Qamardeep S. Bhatia and Vladimir Hlavacèk.

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Example text

S (19) where Ε represents the s u r f a c e energy per u n i t of s o l i d area. Ε depends on the p a r t i c l e w e t t a b i l i t i y ( c h a r a c t e r i z e d by a contact angle or by an energy of adhesion between the s o l i d and the l i q u i d ) but a l s o on the dynamic surface t e n s i o n i . e . the one p r e v a i l i n g under o p e r a t i o n . g. t o mass and/or heat t r a n s f e r s across the l i q u i d f i l m . That i s the main reason why the hydrodynamics i n a t r i c k l e - b e d r e a c t o r may vary with the chemical system adopted and with the operating c o n d i t i o n s .

Clearly the agreement between experiments and theory i s q u i t e s a t i s f y i n g . The parameters estimates are given i n T a b l e I I I . ; ACS Symposium Series; American Chemical Society: Washington, DC, 1984. 32 CHEMICAL AND CATALYTIC REACTOR MODELING t i o n s of about 20% reported above. 4. This value seems to be r a t h e r l o g i c a l i n c o n s i d e r a t i o n with the remarks pointed out above. The parameter Ε as w e l l as L i n c r e a s e markedly with the temperature. This dependence w i l l be analyzed l a t e r on.

D e t a i l s which e x p l a i n the model development have not been given by these authors so i t has not gained wide a p p l i c a b i l i t y . Τ Objectives The above d i s c u s s i o n on previous experimental s t u d i e s i n t r i c k l e - b e d r e a c t o r s suggests that both l i q u i d - s o l i d contacting and mass t r a n s f e r l i m i t a t i o n s play a r o l e i n a f f e c t i n g t r i c k l e - b e d r e a c t o r performance. Except f o r a few i s o l a t e d cases, the r e a c t o r models proposed i n the l i t e r a t u r e f o r gaseous reactant l i m i t i n g r e a c t i o n s have not incorporated p a r t i c l e - s c a l e incomplete c o n t a c t i n g as paît o f t h e i r development.

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