Skip to Main Content
 

Global Search Box

 
 
 

ETD Abstract Container

Abstract Header

Energy Efficient Water Desalination Based on Faradic Reactions

Bentalib, Abdulaziz
http://rave.ohiolink.edu/etdc/view?acc_num=akron1605786789950143

Abstract Details

2020, Doctor of Philosophy, University of Akron, Chemical Engineering.
Freshwater shortage has become an essential issue within the past decades due to the increasing world population, expansion of industries and agriculture, which might greatly threaten over common fraction of the world population. Researchers have developed an efficient technique to desalinate the saltwater (brackish or seawater) to meet the increasing demand of fresh water. Until now, different technologies such as thermal distillation, including multi-stage flash (MSF) and multieffect distillation (MED) , reverse osmosis membrane desalination (RO) have been utilized. Nevertheless, these technologies required an excessive amount of energy. Capacitive deionization was raised as an excellent alternative for water desalination due to low energy input needed and environmentally friendliness. However, it still suffers from the low salt adsorption capacity. Here in this dissertation, I focus in finding a Faradic capacitive electrode that will enhance the salt adsorption capacity through the chemical reactions between the electrodes and the NaCl ions. The electrodes should have a high theoretical capacity, low cost, and be environmentally friendly. By using the amorphous iron phosphate in a hybrid capacitive deionization cell, I was able to enhance the salt adsorption capacity to more than threefold of the conventional capacitive deionization. Nevertheless, the limitation performance from the anodic electrodes was an obstacle in improving the desalination capacity by the hybrid capacitive deionization to the level to compete with the traditional reverse osmosis. Therefore, we synthesized silver mercury alloy which possess a theoretical high capacity to address that issue by reacting with the chloride ions. Peering the silver mercury alloy with the amorphous iron phosphate enabled the faradic capacitive cell to reach a significant high salt adsorption capacity. I also focused my study to find an optimum cell design that will enhance the salt adsorption capacity, limit the ion diffusion issues, and promote a continuous and fast adsorption process with an energy-efficient water-salt separation. Through designing a new cell that consist of two chambers, I was able to find a way to continuously desalinate water without the need of discharging step. Moreover, by the synthesis of a 30 nm size silver and silver mercury, I was able to enhance the salt adsorption capacity to a remarkable level.
Zhenmeng Peng (Advisor)
Bi-min Zhang Newby (Committee Member)
Qixin Zhou (Committee Member)
Chen Ling (Committee Member)
Jun Ye (Committee Member)
134 p.
Chemical Engineering
Faradic Reactions; Water Desalination; Capacitive Deionization; Energy Efficient; pseudocapacitive

Recommended Citations

Citations

  • Bentalib, A. (2020). Energy Efficient Water Desalination Based on Faradic Reactions [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1605786789950143

    APA Style (7th edition)

  • Bentalib, Abdulaziz. Energy Efficient Water Desalination Based on Faradic Reactions . 2020. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1605786789950143.

    MLA Style (8th edition)

  • Bentalib, Abdulaziz. "Energy Efficient Water Desalination Based on Faradic Reactions ." Doctoral dissertation, University of Akron, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1605786789950143

    Chicago Manual of Style (17th edition)

akron1605786789950143
19
© 2020, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.