Author/Authors :
S.J. Wang، نويسنده , , D.S.H. Wong and
E.K. Lee، نويسنده ,
Title Of Article :
Effect of interaction multiplicity on
controlsy stem design for a MTBE
reactive distillation column
Latin Abstract :
The control strategy of a reactive distillation for synthesis of MTBE is investigated. Although steady state multiplicities occur in
the column, a linear control is still possible since a controlled and manipulated variable-pairing scheme that exhibits a sufficiently
large range of near linear relations can be found, if we operate at constant reflux ratio. Reboiler duty is used to control the temperature
of a stage just below the reaction section and near the top of the stripping section. Stoichiometric balance is controlled by a
feed ratio plus internal composition control scheme, using a control valve installed on the C4 feed-line as the manipulated variable.
Such a scheme is capable of maintaining the desirable steady state that achieves high product purity and reactant conversion.
However, a similar scheme that uses a control valve installed on the methanol feed-line as the manipulated variable shows severe
oscillation. It is caused by multiplicity in the interaction between the temperature and stoichiometric control loops.
NaturalLanguageKeyword :
Reactive distillation , MTBE , Control system design
JournalTitle :
Studia Iranica
