期刊
CHEMICAL ENGINEERING RESEARCH & DESIGN
卷 114, 期 -, 页码 287-298出版社
INST CHEMICAL ENGINEERS
DOI: 10.1016/j.cherd.2016.08.032
关键词
VLE; Distillation; Ionic liquid; Recycling; Agitated thin-film evaporation
资金
- Finnish Bioeconomy Cluster (FIBIC)
- Finnish funding Agency for Technology and Innovation (Tekes)
The objective of this work was to explore the feasibility of 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH][OAc]) recovery from water solution by thermal separation. The evaporation behavior of pure [DBNH] [OAc] was first studied using low pressure distillation in the pressure range of 0.5-2 kPa. The dew points of the distillation products from [DBNH] [OAc] were measured in the pressure range of 0.5-15 kPa and modeled using an Antoine equation. Measurements for vapor liquid equilibrium (VLE) of water + [DBNH] [OAc] system were carried out using a static total pressure method. The temperature range for the VLE measurement was 303-353 K. The results showed negative deviation from the Raoult's law. The NRTL activity coefficient model was used to correlate the VLE data. The experiments of [DBNH][OAc] product recovery from a solution containing 80 wt.% water were performed using a pilot-scale agitated thin-film evaporator. The performance of the evaporation system was analyzed as a function of the feed flow rate, the evaporator jacket temperature and the operating pressure. The analyses results indicated that the [DBNH][OAc] product with small water content (5-11.7 wt.%) was achieved by low pressure evaporation in a single stage. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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