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    A Reliable & Novel approach based on Thermodynamic Property estimation of Low to High Salinities Aqueous Sodium Chloride Solutions for Water-Energy Nexus (WEN) Applications

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    A reliable_acs.iecr.0c02575.pdf
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    Description:
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    Type
    Article
    Authors
    Rehman, Lubna Muzamil
    Dey, Ranjan
    Lai, Zhiping cc
    Ghosh, Asim K
    Roy, Anirban
    KAUST Department
    Chemical Engineering Program
    Advanced Membranes and Porous Materials Research Center
    Physical Science and Engineering (PSE) Division
    Date
    2020-08-17
    Online Publication Date
    2020-08-17
    Print Publication Date
    2020-09-09
    Permanent link to this record
    http://hdl.handle.net/10754/664777
    
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    Abstract
    There is a significant need for reliable and accurate thermodynamic property data of hypersaline solutions to understand the minimum heat and work of separation required and is quite useful for large scale desalination and water – energy nexus (WEN) applications. WEN related technological developments are posed to dominate the scientific pursuits in the coming decade. In this regard, an understanding on the thermo-acoustical parameters of hypersaline NaCl-water systems has been carried out in this study which may lead to a better understanding of WEN. An analysis of thermodynamic properties such as free volume, intermolecular free length, isothermal compressibility, isobaric expansibility, relaxation time, and internal pressures using ultrasonic velocity, has assisted us in understanding the various interactions occurring in hypersaline solutions (up to 100 g/kg). A new correlation for internal, osmotic and vapour pressure determination has been proposed in this work. The evaluation of relaxation time showed a minimum value around the concentration range of 25-40g/kg, which could explain the observed seawater salt concentrations at ambient temperatures. A linear variation was observed between osmotic pressure and internal pressure, which shed light on their interdependency. A detailed analysis on the energetics of hypersaline NaCl-water solutions has also been done to emphasize the fact that one must work on the extraction of osmotic power from hypersaline solutions. This work presents a comprehensive framework derived from an understanding of thermo-acoustical parameters of hypersaline solutions, their critical analysis and a look into its application in Osmotic Power Generation technologies.
    Citation
    Rehman, L. M., Dey, R., Lai, Z., Ghosh, A. K., & ROY, A. (2020). A Reliable & Novel approach based on Thermodynamic Property estimation of Low to High Salinities Aqueous Sodium Chloride Solutions for Water-Energy Nexus (WEN) Applications. Industrial & Engineering Chemistry Research. doi:10.1021/acs.iecr.0c02575
    Sponsors
    This work was completed with the help of Undergraduate students of the Department of Chemical Engineering, BITS-Pilani, K.K Birla Goa Campus: Mr. Tushar Damani, Mr. Vaibhav Sridhar, Mr. Tanmay Garg and Mr. Vibhor Mittal. Dr. Anirban would like to thank the Research Initiation Grant (BPGC/RIG/2017-2018, dt. 01/08/2017) and OPERA award (FR/SCM/230117/CHE, dt. 19/08/2017) by BITS-Pilani Goa for carrying out the work. Dr.Anirban would also like to thank DST–SERB for the research grant (CRG/2018/001538 dt. 28/01/2020) for partially supporting the work.
    Publisher
    American Chemical Society (ACS)
    Journal
    Industrial & Engineering Chemistry Research
    DOI
    10.1021/acs.iecr.0c02575
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.iecr.0c02575
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.iecr.0c02575
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Engineering Program

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