Abstract In this study, a few extractive distillation processes with ethylene glycol as solvent are proposed to separate high-purity ethanol and tert-butanol from industrial effluents, including direct ED, indirect ED and heat pump assisted indirect ED. All these processes are optimized with targeting minimum annual total costs by a sequential iteration algorithm. After that, a head-to-head comparison is completed regarding distributions of cost, energy and CO2 emission. The results showed that the direct ED is the most economical process reducing minimum annual total costs by 30.15 % than the heat-pump assisted indirect ED, while the latter is the most energy-efficient process saving energy consumption and CO2 emissions by 14.78 % and 21.79 % than the direct ED.

中文翻译：

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不同萃取精馏工艺分离乙醇/叔丁醇/水混合物的性能评价

摘要 本研究提出了几种以乙二醇为溶剂的萃取精馏工艺，以从工业废水中分离高纯度乙醇和叔丁醇，包括直接ED、间接ED和热泵辅助间接ED。所有这些过程都通过顺序迭代算法以最小的年度总成本为目标进行了优化。之后，就成本、能源和二氧化碳排放量的分布进行了正面比较。结果表明，直接ED是最经济的工艺，与热泵辅助间接ED相比，每年最低总成本降低了30.15%，而后者是最节能的工艺，能耗和CO2排放量分别减少了14.78%和21.79 % 比直接 ED。