Read e-book online Chemical Reactor Design and Control PDF

By William L. Luyben

ISBN-10: 0470097701

ISBN-13: 9780470097700

ISBN-10: 0470134909

ISBN-13: 9780470134900

Chemical Reactor layout and keep watch over makes use of method simulators like Matlab®, Aspen Plus, and Aspen Dynamics to review the layout of chemical reactors and their dynamic keep an eye on. there are lots of books that target steady-state reactor layout. There aren't any books that think about sensible keep watch over platforms for genuine commercial reactors. This detailed reference addresses the simultaneous layout and regulate of chemical reactors. After a dialogue of reactor fundamentals, it: Covers 3 different types of classical reactors: non-stop stirred tank (CSTR), batch, and tubular plug movement Emphasizes temperature keep watch over and the serious impression of steady-state layout at the dynamics and balance of reactors Covers chemical reactors and regulate difficulties in a plantwide surroundings comprises various tables and indicates step by step calculations with equations Discusses how one can use approach simulators to deal with assorted matters and kinds of operationsThis is a pragmatic reference for chemical engineering pros within the method industries, execs who paintings with chemical reactors, and scholars in undergraduate and graduate reactor layout, procedure regulate, and plant layout classes.

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Example text

The heat transfer rate also decreases because there is a greater contribution of the sensible heat of the cooler feed as reactor temperature increases. The behaviors of the jacket temperature and the coolant flowrate are quite interesting for the 50 and 80% conversion cases. At low reactor temperatures, the jacket temperature is low. As reactor temperature increases, the jacket temperature increases for a while but then begins to decrease. This occurs because the smaller reactors have less heat-transfer area, so a larger differential temperature driving force is needed.

This translates into a more controllable reactor. 9 illustrates these effects. 5 are shown. 5 case has more area, higher jacket temperatures and lower RSI. In later sections, reactions with two reactants are discussed in which the reaction rate depends on the concentrations of both reactants: < ¼ k7(CA )a (CB )b (2:18) The relative concentrations of the reactants, as well as the reaction orders, affect the reaction rate and the reactor volume. Overview The message in these examples is that reactors in this exothermic irreversible reaction system should not necessarily be designed for the maximum temperature.

95 m2). If the overall heat transfer coefficient is the same as in the pilot plant (we will come back to this issue in Chapter 2), the required temperature differential between the reactor and jacket increases by a factor of 10 (jacket temperature is 304 K instead of 330 K). 54 kg/s) increases by a factor of 4000. In this large reactor the temperature differential driving force under design conditions is 333 – 304 ¼ 29 K. The largest it can ever be is 333 – 294 ¼ 39 K. Since we are using a large fraction of this maximum differential temperature, there is less “muscle” available.

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Chemical Reactor Design and Control by William L. Luyben

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