Fuel 216 (2018) 503–512 Contents lists available at ScienceDirect Fuel journal homepage: www.elsevier.com/locate/fuel Full Length Article Extractive distillation of methylal/methanol mixture using the mixture of dimethylformamide (DMF) and ionic liquid as entrainers Yichun Dong, Chengna Dai, Zhigang Lei State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Box 266, Beijing 100029, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Methylal is used as an important synthetic fuel blended with diesel oil to reduce the particulate emissions of Methylal toxic gas pollutants without aﬀecting the energy density. The mixed entrainers (dimethylformamide Methanol (DMF) + ionic liquid (IL)) are proposed to replace conventional DMF for the separation of methylal and me- Extractive distillation + − thanol by extractive distillation. [EMIM] [Ac] might be the most promising entrainer screened by COSMO-RS Ionic liquid (IL) model considering relative volatility and solvent capacity together. Vapor–liquid equilibrium (VLE) experiments UNIFAC-Lei model demonstrated that the relative volatility of methylal to methanol is obviously improved after the addition of + − [EMIM] [Ac] into DMF. Moreover, the UNIFAC-Lei model was extended to the methylal-methanol-DMF-IL system, and the corresponding interaction parameters were obtained and input into
Fuel – Elsevier
Published: Mar 15, 2018
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