Dehydration of multicomponent organic systems by a reverse osmosis pervaporation-hybrid process - module-, process design and economics
✍ Scribed by R. Rautenbach; C. Herion; M. Franke
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 442 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0011-9164
No coin nor oath required. For personal study only.
✦ Synopsis
Presently adsorption on active coal is the commonly applied technique for the removal of solvents from polluted air streams for example from paint drying ovens. The necessary regeneration of the active coal by steam stripping results, after condensation and phase separation, in an almost pure solvent mixture which can be recycled and in a water-rich phase which has to be treated further before discharge. Since the solvents are low-boilers as well as high-boilers with respect to water and some, in addition, formazeotropes distillation of this desorbate is complex and expensive. It seemed interesting whether membrane processes could be advantageous in this case.
In cooperation with a German car manufacturer, such a process has been developed, essentially consisting of a combination of RO and PV. After a brief description of the whole process, the reverse osmosis and the pervaporation stage will be discussed in detail. The economics of this process will be discussed and compared with the costs for alternative disposal concepts.