Biobutanol purification by liquid-liquid extraction assisted divided wall columns

Eduardo Sánchez-Ramírez, Juan José Quiroz-Ramírez, Juan Gabriel Segovia-Hernandez, Massimiliano Errico

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review


Biobutanol is receiving a great interest from both academia and industry sectors, and some companies are already focused on revamping bioethanol plants to produce biobutanol. The recovery of fuel grade butanol by distillation was proved to be not economically sustainable. On the other side, hybrid flowsheets, obtained combining liquid-liquid extraction and distillation, were proved to be a valid alternative. Divided wall columns, as one of the most promising intensified distillation alternatives, were here explored in combination with liquidliquid extraction. A multiple objective function taking into account the economy, the environmental impact and the process controllability was defined to screen the alternatives. Among all the configurations considered, liquid-liquid extraction combined with a DWC equipped with two reboilers and a side rectifier, reached 22% and 18% reduction of the economy and environmental index respectively in comparison with conventional schemes. At the same time, also the controllability was improved compared to the hybrid liquid-liquid assisted simple column distillation sequence considered as a reference.

Original languageEnglish
Title of host publicationChemical Engineering Transactions
Publication date2018
ISBN (Print)9788895608662
Publication statusPublished - 2018
Event11th International Conference on Distillation & Absorption - Florence, Italy
Duration: 16. Sep 201819. Sep 2018
Conference number: 11


Conference11th International Conference on Distillation & Absorption
SeriesChemical engineering transactions

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