DAILY PAPER REVIEW

20180813_Temporal and spatial distribution of pH in flow-mode capacitive deionization...

 

 

1. Title, Journal and Authors

Title: Temporal and spatial distribution of pH in flow-mode capacitive deionization and membrane capacitive deionization

Journal: Desalination

Authors: Jihyun Yua, Kyusik Joa, Taeyoung Kimb, Jiho Leea, Jeyong Yoona,c,⁎

a School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Processes (ICP), Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea

b Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, United States

c Asian Institute for Energy, Environment & Sustainability (AIEES), Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea

 

2. Summary

Jihyun Yu et. al. conducted experiments to compare Faradaic reaction in capacitive deionization (CDI) and membrane capacitive deionization (MCDI) depending on the process operation periods. CDI is a desalination process removing salts by applying potential to two activated carbon electrodes. MCDI is also desalination process with two ion-exchange membrane placed in front of two carbon electrodes. Faradic reaction is one of critical issues in CDI. Faradic reaction causes pH fluctuation and generation of H2O2 which decrease the performance of carbon electrodes. The results from this study showed MCDI has an advantage with respect to occurrence of Faradic reaction. Less Faradaic reaction was observed in MCDI than CDI during experiments.

 

3. Originality & Creativity

 - Influence of Faradaic reaction on MCDI was investigated using experimental approaches.

 

4. Application to research

 - To study commercialization of CDI, problems of technology should be carefully reviewed.

 

5. Contact

Seung Ji Lim (Integrated Ph.D. program)

Environmental Systems Engineering Lab.

School of Earth Sciences and Environmental Engineering

Gwangju Institute of Science and Technology

1 Oryong-dong Buk-gu Gwangju, 500-712, Korea

 Phone : +82-10-7935-8845

E-mail : fblsj90@gist.ac.kr

 

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