1. bookVolume 10 (2008): Issue 2 (January 2008)
Journal Details
License
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Journal
First Published
03 Jul 2007
Publication timeframe
4 times per year
Languages
English
access type Open Access

Separation of HCl from the mixture of KCl and HCl using membrane distillation

Published Online: 02 Jul 2008
Page range: 27 - 32
Journal Details
License
Format
Journal
First Published
03 Jul 2007
Publication timeframe
4 times per year
Languages
English

Membrane distillation (MD) was applied for the concentration of solutions containing hydrochloric acid and potassium chloride. The studies of the concentration and separation of HCl through the hydrophobic membrane were performed. In the investigations plate and frame or capillary modules, equipped with membranes from polytetrafluoroethylene and polypropylene were applied, respectively. The feed temperature amounted to 333 K or 343 K and permeate 293 K at the inlet of the module. Under the MD operation conditions the transfer of water vapour and hydrogen chloride from potassium chloride and hydrochloric acid solutions through the hydrophobic membranes took place, whereas the potassium chloride as a nonvolatile component underwent concentration in the feed. The influence of acid concentration and salt presence in the feed on the HCl molar flux through the membrane was systematically studied. The increase of the temperature and salt concentration in the feed caused higher partial pressure volatile of HCl and the resultant HCl Flux through a membrane was higher.

Keywords

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