Results 261 to 270 of about 83,642 (311)

A Novel Countercurrent Fixed Bed Reactor

The Canadian Journal of Chemical Engineering, 2003
AbstractA new three‐phase reactor configuration having countercurrent flow of gas and liquid is proposed. The reactor had an internal diameter of 0.04 m and a catalyst bed height of 1 m. A spiral coil made out of wire gauge was inserted inside the fixed bed of catalyst.
Arunabha Kundu, Shyamal K. Bej, K. D. P. Nigam   +2 more
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Modeling of fixed bed catalytic reactors

Computers & Chemical Engineering, 1985
Abstract The simulation of a fixed-bed catalytic reactor requires the selection of a model, which is a set of balance equations that describes the reactor, as well as correlations for the model parameters involved. In this work general criteria, leading to a better choice of a model that fulfills the objectives of the simulation, are established ...
O.M. Martinez, S.I. Pereira Duarte, N.O. Lemcoff   +2 more
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Enhanced paraxylene selectivity in a fixed‐bed reactor

AIChE Journal, 1985
AbstractSimulations of enhanced paraxylene selectivity in a fixed‐bed reactor are presented in this paper. The primary reaction of alkylation of toluene with methanol and the secondary isomerization of the xylene products occurring inside zeolite catalysts ZSM‐5 are considered.
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FIXED BED REACTOR DYNAMICS AND CONTROL – A REVIEW

IFAC Proceedings Volumes, 1986
Abstract The industrial diversity of fixed bed reactors offers a challenging and relevant set of control problems. These intricate problems arise due to the rather complex dynamics of fixed bed reactors and to the complexity of actual reactor configurations. Many of these control problems are nonlinear and multi-variable. During the last decade fixed
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Parametric sensitivity in fixed-bed reactors

Chemical Engineering Science, 1975
Parametric sensitivity in fixed-bed reactors has been analysed by previous workers using the quasihomogeneous model [i.e. for the kinetic regime only]. In the present paper a general treatment is proposed in which transport limitations are also considered.
R.A. Rajadhyaksha, K. Vasudeva, L.K. Doraiswamy   +2 more
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Autothermal fixed-bed reactor concepts

Chemical Engineering Science, 2000
The principles, properties and applications of autothermal fixed-bed reactor concepts are presented. First we focus on different reactor types for weakly exothermic reactions and discuss their basic behavior, their stability and nonlinear dynamic features. The second part is devoted to the autothermal coupling of endothermic and exothermic reactions. A
G Kolios, J Frauhammer, G Eigenberger
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Biodegradation of Xenobiotics in a fixed bed reactor

Environmental Progress, 1993
AbstractThe specific example of an at‐source biological wastewater treatment has been elaborated and developed. A two‐phase fixed‐bed bioreactor system was tested for its efficiency using phenol as a test substance and then, the degradation of sodium anthraquinone‐2‐sulfonate (SAS) was studied and performed.The continuous aerobic degradation of phenol ...
Chantal Seignez, Vincent Mottier, Cesar Pulgarin, Nevenka Adler, Paul Péringer   +4 more
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The stability of fixed bed catalytic reactors

Chemical Engineering Science, 1973
Abstract A proper control design for safe and economic operation of industrial catalytic reactors requires a detailed study of transient and steady state behaviour. The present paper discusses contributions in this area with an emphasis on the stability problem.
C. McGreavy, M.A. Soliman
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Heat transfer in fixed-bed reactors

The Chemical Engineering Journal, 1973
Abstract For optimum design of fixed-bed reactors the temperature must be predictable at every point. The effects of temperature distribution upon reactor perfo In the design of non-adiabatic reactors, it is particularly important to use accurate values of the wall heat transfer coefficient and the effective th Available correlations for the key ...
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Reactors for Fluid-Solid Reactions: Fixed Bed Reactors

Fixed bed reactors are the most commonly used reactor type in the chemical and petrochemical industry. They are also used for mobile and stationary exhaust gas cleaning. All fixed bed reactors have in common that a solid, usually a catalyst, is spatially fixed in the reactor and is flowed through or over by the reaction mixture.
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