時間：2026-05-22(五) 15:20 pm

講題：Energy intensification of distillation processes for sustainable manufacturing.

講者 :  Prof. Jeffrey D. Ward (吳哲夫 教授)

服務單位：台灣大學化學工程學系  

地點：93406

主持人：李瑞元 教授

摘要：

Distillation is by far the most widely used method for separation of volatile mixtures in the chemical and related industries. It is also a very energy intensive operation, accounting for about half of all energy used in chemical manufacturing and roughly three percent of all energy consumed by human activity worldwide. At present almost all of this thermal energy is generated by combusting fossil fuels. Therefore efforts to decarbonize chemical manufacturing and transition to sustainable production must include addressing the energy consumption attributable to distillation.Traditional approaches to energy intensification of distillation processes include thermal coupling, dividing-wall columns, side-stream configurations, and column stacking. In this talk, recent research from our group will be presented on a new class of intensified distillation systems known stacked side-stream sequences. By combining liquid side-streams with column stacking, these configurations simultaneously reduce remixing losses and recover energy through direct condenser-to-reboiler heat integration. Results show that stacked configurations outperform conventional distillation sequences and often surpass thermally coupled or dividing-wall alternatives in both total annual cost and energy efficiency.The talk will present results for a large number of optimized distillation systems, including a comprehensive comparison of fifteen side-stream sequences with and without forward and backward column stacking. The results demonstrate that considering column stacking can dramatically change the ranking of preferred process configurations and lead to substantial additional energy savings.In addition to economic optimization, the presentation will discuss energy, entropy generation, exergy loss, and thermodynamic efficiency as metrics for evaluating intensified distillation processes. The work illustrates how relatively simple modifications to conventional distillation systems can produce large reductions in energy consumption while avoiding some of the operational challenges associated with fully thermally coupled configurations.

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