Process Synthesis and Optimization of Heat Pump Assisted Distillation for Ethylene-Ethane Separation,Industrial & Engineering Chemistry Research

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Process Synthesis and Optimization of Heat Pump Assisted Distillation for Ethylene-Ethane Separation
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-21 , DOI: 10.1021/acs.iecr.8b02496
Matthew Bryan Leo ₁ , Arnab Dutta ₁ , Shamsuzzaman Farooq ₁

Affiliation

Ethylene is a platform chemical, and its production process includes energy intensive ethylene-ethane separation via cryogenic distillation. As potential avenues for energy reduction, in this study we have explored four distillation process configurations based on the concepts of mechanical vapor recompression (MVR) of the top product and throttling of the bottom product i.e., bottom flashing (BF). Each of these configurations is optimized in MATLAB using the genetic algorithm to minimize the total annualized cost (TAC) of separation. Our results show that both MVR and BF reduce energy as well as cost of separation compared to the conventional distillation configuration. However, BF outperforms MVR, and together with a prethrottling cooler it provides the minimum TAC configuration for ethylene-ethane separation. The proposed heat pump assisted distillation configuration has the potential to reduce the total energy requirement by 57% and the separation cost by 44% over the conventional distillation process.

中文翻译：

乙烯-乙烷分离的热泵辅助蒸馏工艺综合与优化

乙烯是一种平台化学品，其生产过程包括通过低温蒸馏进行的能源密集型乙烯-乙烷分离。作为降低能耗的潜在途径，在这项研究中，我们根据顶部产品的机械蒸气再压缩（MVR）和底部产品的节流即底部闪蒸（BF）的概念，探索了四种蒸馏工艺配置。使用遗传算法在MATLAB中对这些配置中的每一个进行了优化，以最大程度地减少总的年度分离成本（TAC）。我们的结果表明，与传统的蒸馏配置相比，MVR和BF都减少了能源并降低了分离成本。但是，BF的性能优于MVR，并与节流冷却器一起为乙烯-乙烷分离提供了最小的TAC配置。

更新日期：2018-08-21

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