The paper discusses distillation column control within the general framework of plantwide control. In addition, it aims at providing simple recommendations to assist the engineer in designing control systems for distillation columns. The standard LV-configuration for level control combined with a fast temperature loop is recommended for most columns.

Internally heat integrated distillation column has received a great attention lately because of its ultimate potential for energy savings. Typical conceptual design of such columns is based on constant heat transfer duties along the column stages. This paper introduces more effective approach to conceptual design of heat integrated distillation columns based on constant available heat transfer ...

Distillation column is one of the most common operations in process industries and is while the most expensive unit of the amount of energy consumption. Many ideas have been presented in the related literature for optimizing energy consumption in distillation columns. This paper studies the different heat integration methods in a distillation column which separate Benzene, Toluene, Xylene, and ...

Two advanced controllers were developed in this paper, i.e., a type-1 and a type-2 fuzzy logic controller and their performances compared in simulation for a case study, i.e., a binary distillation column, which is characterized by high nonlinearities and parameter uncertainties in the underlying mathematical model. Priority was given to the type-2 fuzzy controller, with special attention to in...

A new approach for energy-saving process intensification was demonstrated by a heat integration method taking for instance the C-5 splitter distillation plant existing for extracting pure c-pentane from a petroleum hydrocarbon mixture obtained by naphtha cracking. A process simulation analysis was made without loosening the specifications of separation of the existing plant. A new process-inten...

In this paper we will consider the most known ratios control schemes ((L/D, V/B),(L/D,V/F), Ryskamp’s, and (D/(L+D),V/B)) for binary distillation column and we compare them in the basis of interactions and disturbance propagation. The models for these configurations are deuced using mathematical transformations taking the energy balance structure (LV) as a base model. The dynamic relative magni...

Distillation column is one of the key elements in the process of chemical industries, which is having nonlinear, multivariable and non-stationary characteristics. The conventional controller like PID provides ineffective control action for nonlinear system. This paper deals the design of the model based predictive controller to control composition of the Bubble cap distillation column consists ...

In this work, the use of heteroazeotropic distillation for separation of thermally instable substances is discussed. A new process has been developed and analysed, which makes use of the fact that the boiling temperature of a heteroazeotrope is always lower that that of its constituents. Three phase distillation is characterised by the fact that two liquid phases and a vapour phase coexist in t...

The issues raised in advanced process control applications lead control engineers to be aware of the need of integrating advanced information processing capabilities in the process control loop. In this paper a SIMULINK based tool has been developed for analysis and design of multivariable neural based control systems. This tool has been applied to the control of a high purity distillation colu...

The feasibility of a novel multivessel batch distillation–decanter hybrid for simultaneous separation of ternary heterogeneous azeotropic mixtures is addressed both theoretically and by simulations. The multivessel column is operated as a closed system without product withdrawal and the three components are accumulated in the vessels during one closed operation. The closed mode (total reflux) o...