Abstract
This paper presents the study of the optimal synthesis of energy efficient distillation columns (EEDCs) sequenceby using the driving force method. In order to perform the study and analysis, the EEDCs sequence methodologyhas been developed. Accordingly, the methodology consists of four hierarchical sequential steps; Step 1: ExistingSequence Energy Analysis, Step 2: Optimal Sequence Determination, Step 3: Optimal Sequence Energy Analysis,and Step 4: Energy Comparison. The capability of this methodology has been tested in designing minimumenergy distillation column sequence for hydrocarbon mixture separation process. The results show that themaximum of 39.6 % energy reduction was able to achieve by changing the sequence suggested by the drivingforce method. It can be concluded that, the sequence determined by the driving force method is able to reduceenergy requirement for hydrocarbon mixture separation process. All of this findings show that the methodologyis able to design minimum energy distillation column sequence for hydrocarbon mixture separation process in aneasy, practical and systematic manner.
Highlights
The production of a set of product stream from a feed hydrocarbon mixture is a basic task in the natural gas processing
The results show that the maximum of 39.6 % energy reduction was able to achieve by changing the sequence suggested by the driving force method
It can be concluded that, the sequence determined by the driving force method is able to reduce energy used for hydrocarbon mixture separation process
Summary
The production of a set of product stream from a feed hydrocarbon mixture is a basic task in the natural gas processing. Since the multiple products produced by the hydrocarbon mixture separation process and because of the large amount of energy required, hydrocarbon mixture separation process provides several opportunities for the economical process improvement This can be systematically and effectively achieved by using driving force method. 2. Energy Efficient Distillation Columns Sequence Methodology To perform the study and analysis of the energy saving improvement for the energy efficient hydrocarbon mixture separation sequence, EEDCs sequence methodology is developed based on the driving force method. The energy used in the optimal sequence is compared with the base sequence The capability of this methodology is tested in designing minimum energy distillation column sequence for hydrocarbon mixture separation process, which consists of 11 compounds (propane, i-butane, n-butane, i-pentane, n-pentane, n-hexane, benzene, cyclohexane, n-heptane, toluene, n-decane) with 10 direct sequence distillation columns
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