Capacitive neutralization deionization with flow electrodes

Wang, Miao; Hou, Shujin; Liu, Yong; Xu, Xingtao; Lü, Ting; Zhao, Ran; Pan, Likun

doi:10.1016/j.electacta.2016.09.026

Cited by 36 publications

(16 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the operational mode in FCDI, unlike CDI, − is not expected to have a significant impact on the energy demand. FCDI offers good scalability and opens new opportunities regarding applications and process design. − …”

Section: Introductionmentioning

confidence: 99%

Energy Recovery and Process Design in Continuous Flow–Electrode Capacitive Deionization Processes

Rommerskirchen

Linnartz

Müller

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Flow-electrode capacitive deionization (FCDI) is an electrically driven water desalination process based on the adsorption of ions in pumpable carbon flow-electrodes, also called slurry electrodes, which act as an electrical double-layer capacitor. The pumpability of the electrodes enables a fully continuous operation of FCDI and a whole range of new process designs in contrast to capacitive deionization processes based on static electrodes. In this work, we demonstrate continuous energy recovery of up to 36% of the energy applied during the desalination step during the regeneration of the carbon flow-electrodes. The process performance and energy demand for desalination and pumping of the flow-electrodes are investigated for different FCDI process layouts. The potential of FCDI systems is compared to state-of-the-art desalination methods regarding the energy demand. The energy demand and influence of specific process parameters, such as the applied voltage and the feedwater salinity, are discussed on the basis of theoretical calculations. The findings indicate further directions for the development of FCDI processes which may make it competitive.

show abstract

Section: Introductionmentioning

confidence: 99%

Energy Recovery and Process Design in Continuous Flow–Electrode Capacitive Deionization Processes

Rommerskirchen

Linnartz

Müller

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…The FCND system exhibits a promising performance compared to either ND or FCDI process, where the average salt adsorption rate and salt removal efficiency of FCND were 203.3 mmol m -2 min -1 and 72.2% in 0.1 mM NaCl solution at 1.2 V after 120 min. 184 At the same operating conditions, the values of average salt adsorption rate and salt removal efficiency for an FCDI system were approximately 120.9 mmol m -2 min -1 and 42.9%, respectively.…”

Section: Capacitive Neutralization Deionizationmentioning

confidence: 85%

“…Recently, Wang, et al 184 proposed a new concept of desalination, i.e., flow-electrode capacitive neutralization deionization (FCND), which combines neutralization dialysis (ND) and flow-electrode capacitive deionization (FCDI), as shown in Fig. 11(a).…”

Section: Capacitive Neutralization Deionizationmentioning

confidence: 99%

Electrokinetic desalination of brackish water and associated challenges in the water and energy nexus

Pan

Snyder

Lin

et al. 2018

Environ. Sci.: Water Res. Technol.

View full text Add to dashboard Cite

show abstract

“…Conventional methods for removing metal ions include electrochemical and chemical precipitation, ion exchange, membrane separation, coagulation–flocculation, adsorption, and capacitive deionization (CDI) (Ali et al., 2011; Fan et al., 2016; Hering et al., 1997; Mossad and Zou, 2012; Shin et al., 2011). Among these, the CDI technique is widely used because it offers simple operation, low cost, high efficiency, and no secondary pollution (Demirer et al., 2013; Hemmatifar et al., 2016; Wang et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Removal of heavy metal ions from wastewater by capacitive deionization using polypyrrole/chitosan composite electrode

Zhang

Xue

et al. 2019

Adsorption Science & Technology

View full text Add to dashboard Cite

A polypyrrole/chitosan composite material was obtained by chemical polymerization. The adsorption performance of a hot-molded polypyrrole/chitosan composite electrode was tested by adsorption/desorption experiments. Scanning electron microscopy and Fourier-transform infrared spectroscopy both showed the deposition of polypyrrole on the chitosan surface. The specific capacitance of the polypyrrole/chitosan composite was determined by cyclic voltammetry in 1.0 M KCl at 0.01 V/s as 102.96 F/g. The adsorption/desorption experiments indicated that the specific adsorption capacity of the composite for Cu2+ was 99.67 mg/g, while the removal performance for other metal ions, such as Ag+, Pb2+, and Cd2+, was good. The results of multicycle adsorption/desorption tests showed that the adsorption rate of the polypyrrole/chitosan composite electrode for Cu2+ was decreased from 56.4 to 51.4% over 10 cycles, demonstrating the stable metal-ion adsorption/desorption behavior of the composite electrode. The obtained performances show that the prepared polypyrrole/chitosan composite material is an ideal electrode material for the removal of heavy metal ions.

show abstract

Capacitive neutralization deionization with flow electrodes

Cited by 36 publications

References 28 publications

Energy Recovery and Process Design in Continuous Flow–Electrode Capacitive Deionization Processes

Energy Recovery and Process Design in Continuous Flow–Electrode Capacitive Deionization Processes

Electrokinetic desalination of brackish water and associated challenges in the water and energy nexus

Removal of heavy metal ions from wastewater by capacitive deionization using polypyrrole/chitosan composite electrode

Contact Info

Product

Resources

About