(537d) Temperature Driven Internal Heat Integration for Designing a Novel Energy-Efficient Double Annular Reactive Distillation Column | AIChE

(537d) Temperature Driven Internal Heat Integration for Designing a Novel Energy-Efficient Double Annular Reactive Distillation Column

Authors 

Seo, C., Korea Advanced Institute of Science and Technology (KAIST)
Lee, H., Korea Advanced Institute of Science and Technology
Lee, J., Korea Advanced Institute of Science & Technology (KAIST)
This study proposes the internal heat integration strategy of a reactive distillation (RD) column for the simultaneous production of 2-ethylhexyl dodecanoate and methyl dodecanoate. Due to the significant temperature difference between the two reactions, a two RD column process which each single reaction occurs in each column, consumes less energy than a direct sequence consisting of one RD column followed by a non-RD column. Therefore, the internal heat integration in a partial double annular configuration is introduced based on two RD column process. In the newly proposed annular RD configuration, heat is transferred from a higher temperature reactive section to a lower temperature reactive section. Using the concept of pinch temperature, the heat transfer stages were determined to ensure sufficient temperature driving force. The internal heat integrated distillation column (HIDiC) showed lower internal flow rate and energy consumption compared to the direct sequence and the reactive dividing wall column (RDWC), where maintaining the same product purity and reaction extent. The total utility consumption of the HIDiC with a partial double annular structure showed energy savings of 15.4% and 14.4$ compared to the direct sequence and RDWC, respectively.