(537d) Temperature Driven Internal Heat Integration for Designing a Novel Energy-Efficient Double Annular Reactive Distillation Column
AIChE Annual Meeting
2022
2022 Annual Meeting
Process Development Division
Poster Session: Process Development
Wednesday, November 16, 2022 - 3:30pm to 5:00pm
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.