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Figure from:Sustainable Integrated Process Design and Control for an Extractive Distillation Column System

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ae As a conclusion, a systematic-based methodology has been developed for sustainable integrated process design and control (Sustain-IPDC) for a distillation column system. This methodology has been applied and verified for a single distillation column. The presented case study of Benzene- Toluene separation process has shown that the optimal design with respect to design, control, sustainability and economic criteria can be obtained in an efficient and systematic way. The objective of this stage is to select the best candidate by analyzing the value of the multi- objective function. The multi-objective function is calculated by summing up the multi-objective function value. From the result tabulated in Table 4, it is clearly seen that the multi-objective function, J for distillation column design A is the highest compared to other designs. Therefore, it is verified that the distillation column design at the maximum point of driving force is an optimal solution for Sustain-IPDC of a Benzene-Toluene separation process which satisfies the design, control, sustainability and economic criteria.

Table 4 ae As a conclusion, a systematic-based methodology has been developed for sustainable integrated process design and control (Sustain-IPDC) for a distillation column system. This methodology has been applied and verified for a single distillation column. The presented case study of Benzene- Toluene separation process has shown that the optimal design with respect to design, control, sustainability and economic criteria can be obtained in an efficient and systematic way. The objective of this stage is to select the best candidate by analyzing the value of the multi- objective function. The multi-objective function is calculated by summing up the multi-objective function value. From the result tabulated in Table 4, it is clearly seen that the multi-objective function, J for distillation column design A is the highest compared to other designs. Therefore, it is verified that the distillation column design at the maximum point of driving force is an optimal solution for Sustain-IPDC of a Benzene-Toluene separation process which satisfies the design, control, sustainability and economic criteria.

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Figure 1: Sustainable Integrated Process Design and Control methodology for distillation column.
Figure 1: Sustainable Integrated Process Design and Control methodology for distillation column.
Table 1: Values of design variable for different design alternatives of separation Benzene-Toluen for distillation column design. Olde 0. VLUHNUOLTIOL VAUolel SALA LYols At this stage, the controllability performance of each of the feasible candidates is evaluated and validated for the selection of controller structure. There are two criteria that need to be analyzed which are sensitivity of controlled variables y with respect to disturbances d and sensitivity of controlled variables y with respect to the manipulated variables u. The details procedure for controller design analysis are shown in Hamid’s work [3]. The results are summarized in Table 2. It clearly shows that design A has the best controller design compare to design B and C.
Table 1: Values of design variable for different design alternatives of separation Benzene-Toluen for distillation column design. Olde 0. VLUHNUOLTIOL VAUolel SALA LYols At this stage, the controllability performance of each of the feasible candidates is evaluated and validated for the selection of controller structure. There are two criteria that need to be analyzed which are sensitivity of controlled variables y with respect to disturbances d and sensitivity of controlled variables y with respect to the manipulated variables u. The details procedure for controller design analysis are shown in Hamid’s work [3]. The results are summarized in Table 2. It clearly shows that design A has the best controller design compare to design B and C.
Figure 2: Driving force diagram for separation of Benzene-Toluene by a distillation column.
Figure 2: Driving force diagram for separation of Benzene-Toluene by a distillation column.
Table 2: Derivatives values of potential controlled variables with respect to potential manipulate variables at different distillation design for Benzene-Toluene separation system.
Table 2: Derivatives values of potential controlled variables with respect to potential manipulate variables at different distillation design for Benzene-Toluene separation system.
OO 8 NS A eS Re ee The distillation designs will be analyzed using profit function in order to analyze the design that vill provide re profit of s calculated The result of \ has the hig he maximum profit. There are four criteria used to calculate the profit function, which product, cost of material, depreciation cost and operating cost. The economic analysis by assuming that the distillation column is operating in 5 years and 340 days per year. the calculation is summarized in Table 4. From the results, distillation design at Point hest profit and this verified that the best design in terms of economic criteria. stage 6: Fina Selection and Verification
OO 8 NS A eS Re ee The distillation designs will be analyzed using profit function in order to analyze the design that vill provide re profit of s calculated The result of \ has the hig he maximum profit. There are four criteria used to calculate the profit function, which product, cost of material, depreciation cost and operating cost. The economic analysis by assuming that the distillation column is operating in 5 years and 340 days per year. the calculation is summarized in Table 4. From the results, distillation design at Point hest profit and this verified that the best design in terms of economic criteria. stage 6: Fina Selection and Verification