Download Dynamics and Control of Chemical Reactors and Distillation by International Federation of Automatic Control, C. McGreavy PDF

By International Federation of Automatic Control, C. McGreavy

Offers the newest result of either educational and business learn within the regulate, modelling and dynamics of 2 of the main basic elements of all chemical engineering plant. comprises contributions on fixed-bed, gas-phase and tubular reactors, thermal cracking furnaces and distillation columns, concerning functions in all significant components of chemical engineering, together with petrochemicals and bulk chemical manufacture. comprises fifty one papers.

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Read Online or Download Dynamics and Control of Chemical Reactors and Distillation Columns. Selected Papers from the IFAC Symposium, Bournemouth, UK, 8–10 December 1986 PDF

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Additional info for Dynamics and Control of Chemical Reactors and Distillation Columns. Selected Papers from the IFAC Symposium, Bournemouth, UK, 8–10 December 1986

Sample text

1979, 1980) showed conclusively that the reason for such behaviour lay in the discontinous particle nucleation phenomena occurring in the early reactors. A final point, that is apparent to most people working with polymerization reactors, is that these processes are highly interactive, and usually must be treated as true multivariable systems. g. initiator, monomer, etc) will usually affect many of the output quality variables. It is for this reason that so much effort has been spent in efforts to develop mechanistic models of polymerization processes.

F r e e r a d i c a l , bulk or s o l u t i o n polymerizations at low conversions are among the easiest to model. g. Hamielec and MacGregor, 1983). ) Obtaining good estimates of these parameters is far from straightforward. Large amounts of data on molecular weights are required, and often the type of data required (GPC, NMR) is very difficult to obtain due to the poor 31 J. F. MacGregor 32 precision of the measurements or to the insolubility of the branched polymer, etc.. For Ziegler-Natta systems the understanding of the molecular weight development process is much less well understood.

The simplest complex column is a sidestream column, discussed above. As was noted, the simple sidestream column is of limited value since it is not possible to produce three pure products, and the applications described were cases which do not have this requirement. Three pure products can be achieved by the addition of either a sidestream stripper (Fig,3) or a sidestream rectifier (Fig,4). In both cases the feed to the sidestream column contains only two components. The sidestream column may have its own condenser and reboiler but it is more usual to omit the condenser (stripper) or the reboiler (rectifier) as shown.

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