Abstract
A model has been developed that describes the CO 2 release and the carbonate system in multiple-effect distillers. Included is the flow path of seawater through the final condenser and the evaporator stages. The desorption of CO 2 was described as a problem of coupled mass transfer with chemical reaction.A computer program was written for simulating the CO 2 release and the carbonate system. The CO 2 release rates as well as the HCO 3 −, CO 3 2−, CO 2, H + and OH − concentrations in the brine were simulated for a multiple-effect distiller with typical dimensions at various operating conditions. The effects of top brine temperature, concentration factor, seawater salinity and pH on CO 2 release and the carbonate system were studied. The release rates of CO 2 decrease from the first to the last stage. CO 2 release increases with increasing top brine temperature. The total CO 2 release (sum of the CO 2 release in the stages) increases from about 14 g CO 2 per ton of feed water at a top brine temperature of 60°C to about 18.2 g/t at 70°C. Between 14% and 18% of the total inorganic carbon content in the feed water is released as CO 2. CO 2 release rates increase with decreasing concentration factor. Relating the desorption rates to the feed water flow rates, the specific CO 2 release increases with the concentration factor. CO 2 release rises with increasing salinity and decreasing pH of the seawater.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
