AI Article Synopsis
- The study compares three electrodialysis (ED) methods for converting sodium sulfite (NaSO) into valuable chemicals like NaOH and HSO, focusing on their efficiency and costs.* -
- Experimental results show that while the BMED and EDM configurations perform better overall, the BMEDM method yields higher net profits despite its lower performance metrics.* -
- EDM is most suitable for smaller factories with lower NaSO production, while BMED and BMED-5 are recommended for larger operations due to their higher profit margins.*
Article Abstract
To convert NaSO into other high-value products (NaOH, HSO, and (NH)SO), three types of cell configurations of electrodialysis (ED) were applied (three-compartment bipolar membrane ED (BMED), four-compartment ED metathesis (EDM) and five-compartment bipolar membrane ED multifunction (BMEDM)) and parameters such as average voltage variation, removal ratio of salt, product concentration, conversion rate, ion flux, and energy consumption were calculated and compared. The experimental results and calculations indicated that the overall performance of BMEDM was inferior to that of BMED and EDM. An industrial model was established, which indicated that the net profit from converting NaSO using BMEDM was always higher than that from BMED and EDM. Based on the advantages of low investment (132 $) and energy cost (152 $/t NaSO), EDM was applicable to factories with a low output of NaSO (production capacity <45%), whereas BMED (157.3 $/t NaSO) and BMED-5 (227.6 $/t NaSO) were applicable to factories with a high output of NaSO (production capacity >45%) based on high net profits.
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| http://dx.doi.org/10.1016/j.jenvman.2024.122513 | DOI Listing |
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