TAILIEUCHUNG - Capacitive deionization (CDI) for desalisation using carbon aerogel electrodes

Capacitive deionization (CDI) is an electrochemical water treatment process that holds the promise of not only being a commercially viable alternative for treating water but for saving energy as well. Carbon aerogel electrodes for CDI process with high specific surface area ( m2 /g) and nanopore (2-90 nm) have been prepared via pyrolyzing RF organic aerogel at 800oC in nitrogen atmosphere. | SCIENCE & TECHNOLOGY DEVELOPMENT, Vol 19, 2016 Capacitive deionization (CDI) for desalisation using carbon aerogel electrodes Le Khac Duyen Pham Quoc Nghiep Le Anh Kien Institute for Tropicalisation and Environment, ITE, Ho Chi Minh City, Vietnam (Manuscript Received on July, 2016, Manuscript Revised on September, 2016) ABSTRACT Capacitive deionization (CDI) is an carbon aerogel electrodes were investigated for electrochemical water treatment process that the NaCl absorption into a CDI cell at variation holds the promise of not only being a commercially viable alternative for treating conditions. Experiments data showed that the maximum NaCl removal capacity was water but for saving energy as well. Carbon aerogel electrodes for CDI process with high mg/g in 500 mg/L NaCl solution, higher than for other carbon-based materials in the literature. It specific surface area ( m2/g) and nanopore (2-90 nm) have been prepared via was evaluated that the CDI process using carbon aerogel electrodes promising to be an pyrolyzing RF organic aerogel at 800oC in effective technology for desalination. nitrogen atmosphere. The CDI characteristics of Keywords: Capacitive deionization, carbon aerogel, aerogel electrodes, desalination, electrosorption. applied charge. Cations and anions are drawn 1. INTRODUCTION Capacitive deionization (CDI) is a technology for removing ionic materials from aqueous solution using an electrostatic adsorption reaction on the electric double layer (EDL) created on the electrode surface interface when a potential is applied on porous carbon electrodes [1, 2]. The technique is mainly applicable for brackish water and offers advantage of easy regeneration, low voltage, and toward the cathode and anode, respectively. Salts from water are removed by the electrosorption of ions on the porous surface of electrodes [3]. After the electrode becomes saturated, it can easily be regenerated by cancelling or

• Hoá học
• Capacitive deionization (CDI)
• Carbon aerogel electrodes
• High specific surface
• Pyrolyzing RF organic aerogel
• The CDI process