Author: Charles PotterPublisher:
ISBN:
Category :
Languages : en
Pages : 103
Book Description
The Development and Evaluation of a Mathematical Model for a Fixed Bed Catalytic Reactor
Author: Charles PotterThe Development and Evaluation of a Mathematical Model for a Fixed Bed Catalytic Reactor
Author: Richard V. PorcelliModelling, Simulation and Optimization of Industrial Fixed Bed Catalytic Reactors
Author: S.S.E.H. ElnashaiePublisher: Routledge
ISBN: 135143067X
Category : Mathematics
Languages : en
Pages : 510
Book Description
In the last two decades impressive advances have been made toward the understanding and quantitative description of the kinetics. Despite these advances, however, the use of mathematical modelling of gas-solid catalytic reactors in industry is still limited. By consolidating progress in the understanding of catalytic processes, this book applies these fundamental advances to the development of models for design, simulation and optimization of industrial reactors. Paying particular attention to the verification of the developed models against industrial data, these models are used to optimize the performance of many practical reactor cases. Using a systems approach for the development of the different components and the resulting overall models, the book is easy to read and gives an insight into the behaviour of these complex industrial systems. In addition, the practical relevance of bifurcation, instability and chaos to industrial reactors is briefly discussed.
A Steady State Mathematical Model of a Fixed Bed Catalytic Reactor
Author: John C. ReindlPublisher:
ISBN:
Category : Butanol
Languages : en
Pages : 238
Book Description
The Dynamics and Stablilty of Fixed Bed Catalytic Reactors
Author: Colin Ivan AdderleyPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Various aspects of the behaviour of fixed bed reactors supporting highly exothermic reactions, relevant to stable -optimal design and control, have been studied using detailed mathematical models. In order to establish the form of the simplest basic structure, two methods of describing radial heat transfer in two dimensional packed beds have been examined. It is shown that a lumped parameter single phase heat transfer model which implicitly incorporates the heterogeneous structure can account not only for the radial heat flux associated with both the fluid and solid phases but is also the more appropriate formulation since it allows the important reaction rate limitations due to intraparticle mass transfer to be properly estimated. Using this two dimensional, heterogeneous dynamic model of the reactor it has been possible to evaluate a simpler one dimensional formulation. It is shown that the latter gives an adequate-description of the dynamic behaviour of the system, provided that the overall heat transfer coefficient between the fluid and the coolant is suitably defined, and may, therefore, be used for general studies of reactor performance. Consideration has been-given to the response of the reactor to sinusoidal perturbations of the inlet conditions. It has been found that at certain frequencies of oscillation temperature runaway may develop before a safe quasi-stationary state is reached. A detailed examination of this behaviour has shown that in addition to the non-linear effects the difference in the speeds of propagation of the concentration and temperature waves along the reactor as a result of the heterogeneity of the system is also very significant. The effect of both cocurrent and countercurrent cooling of a single reactor tube has been examined. The behaviour for perturbations in coolant temperature is similar to that for inlet temperature and indicates potential difficulties in the design of control systems. A mathematical model of a multitubular reactor with crossflow cooling has been developed and used to identify some of the problems which may arise in these systems. In particular, considerable interaction between the individual reactor tubes occurs when significant conversion of the reactant takes place. This causes tubes in different parts of the bundle to exhibit different behaviour and with countercurrent cooling this may give rise to multiple steady states due to the feedback of heat within the system. A technique has been developed for predicting regions of parametric sensitivity and temperature runaway in heterogeneous fixed bed reactors. The relationship between this form of instability and that due to multiple states of the catalyst pellet has been demonstrated. Application of this method to both the design and control of a reactor is discussed and it is shown that it provides an insight as to the behaviour of the system since it makes possible the establishment of a relationship between local and global reactor stability and the operating variables.
Fixed-Bed Reactor Design and Diagnostics
Author: Howard F. RasePublisher: Butterworth-Heinemann
ISBN: 1483162397
Category : Science
Languages : en
Pages : 375
Book Description
Fixed-Bed Reactor Design and Diagnostics: Gas-Phase Reactions presents the essential theoretical and conceptual background of gaseous reactions catalyzed by solid catalysts in fixed beds. This book intends to provide recommendations to professionals who seek for modeling, scale-up, and diagnostics of fixed-bed reactors. The text is divided into three parts. Part I provides the conceptual background and relevant theories. Part II presents recommended mathematical models, scale-up procedures, and diagnostic methods. Part III gives a number of practical examples. The topics that are specifically discussed include heterogeneous catalysis and kinetics; general tubular reactor model; and general diagnostics for fixed-bed reactors. Engineers and professionals working with fixed-bed reactors will find the book highly informative.
The Development and Study of a Mathematical Model for Non-catalytic Reactions in a Fludized Bed Reactor
Author: Charles Joseph DalePublisher:
ISBN:
Category : Chemistry
Languages : en
Pages :
Book Description
The Development and Study of a Mathematical Model for Non-Catalytic Reactions in a Fluidized Bed Reactor
Author: Charles Joseph DalePublisher:
ISBN:
Category :
Languages : en
Pages : 102
Book Description
A mathematical model for the simulation of non-catalytic solid-gas reactions in a fluidized bed reactor is proposed. The performance of the model in predicting solid reactant conversions for an ore roasting process is investigated using available literature data. Model development required simplifying assumptions. The sensitivity of the model to certain of these assumptions is investigated. (Author).
Unsteady Processes in Catalytic Reactors
Author: I︠U︡riĭ Shaevich MatrosPublisher: Elsevier Science Limited
ISBN: 9780444425232
Category : Technology & Engineering
Languages : en
Pages : 364
Book Description
The major topic of the book is the investigation of steady and unsteady processes in reactors with a fixed catalyst bed and the formulation of practical recommendations for realizing catalytic processes of high efficiency. The material is based mainly on research carried out at the Novosibirsk Institute of Catalysis of the Siberian Branch of the USSR Academy of Sciences. Most of the information is technologically orientated and in presenting the subject matter mathematical calculations have often been omitted while the physical sense of the results obtained from the study of mathematical models is always discussed. The book has a comprehensive and detailed bibliography and keyword index. It will be especially useful for specialists in the field of chemical engineering at industrial companies who are working on the development of catalytic processes, in the operation of chemical reactors and for students and post-graduate students of the same disciplines.
Chemical and Catalytic Reactor Modeling
Author: American Chemical Society. MeetingPublisher:
ISBN:
Category : SCIENCE
Languages : en
Pages : 448
Book Description