反應/分離迴流程序之設計與控制(2/3)
Other Title
Interaction between Design and Control for an Adiabatic Tubular
Reactor Process with Recycle(2/3)
Reactor Process with Recycle(2/3)
Date Issued
2005
Date
2005
Author(s)
余政靖
DOI
932214E002013
Abstract
In this work, the design and control problem of recycle
processes with a bimolecular reaction taking place in
an adiabatic tubular reactor is explored. Although
hypothetical components are used in this paper, the
chemistry and the flowsheets are similar for a very
large number of real industrial processes, e.g.,
production of isooctane, amines, methanol, ammonia,
ethyl-benzene, etc. Optimal reactant distribution can
be obtained directly form the simplified TAC equation
and effects of kinetics parameters and relative
volatilities on this optimality are also explored. Next
the connection between reactor temperature and
operability is established analytically for the simplified
process. It reveals the important difference between
isothermal and adiabatic operations, especially for the
reversal in production rate variation as the recycle
flow changes. For the operability analysis, two control
structures are proposed with three different
combinations of TPM. For the case of equally
distributed reactant, the control structure using the
reactor inlet temperature as TPM gives good control
performance when the reactant distribution is held
constant. For the case of biased reactant distribution,
the reactant redistribution provides an extra degree of
freedom and this alleviates the high Tout problem. The
results presented in this work clearly indicate that
simple material and energy balances provide useful
insights in the design and control of recycle processes.
Publisher
臺北市：國立臺灣大學化學工程學系暨研究所
Type
report
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