Integration of conventional electrodialysis and electrodialysis with bipolar membranes for production of organic acids

Wang, Yaoming; Zhang, Xu; Xu, Tongwen

doi:10.1016/j.memsci.2010.09.018

Cited by 68 publications

(32 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Taking the ED process for organic acids production 36,37 Similarly, energy consumption of the ED/EED coupling process may be decreased from 2.25 to lower than 1.0 kW h kg −1 . Though the value is still much higher than that of the precipitation step in the Bayer process (0.064 kW h kg −1 ), the higher energy consumption should be at least partly offset by the increased production efficiency.…”

Section: Coupling Processmentioning

confidence: 99%

Optimized Process for Separating NaOH from Sodium Aluminate Solution: Coupling of Electrodialysis and Electro-Electrodialysis

Yan

2015

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Most bauxite-produced alumina is obtained by the Bayer process, but the production efficiency is limited by the slow gibbsite crystal growth due to the high concentration of NaOH in sodium aluminate solution. Here electrodialysis (ED) and electro-electrodialysis (EED) are coupled to separate NaOH from the sodium aluminate solution so as to enhance the gibbsite crystal growth rate and achieve high alumina production efficiency. The ED or EED process is also investigated before the coupling process to find the optimal operating conditions. The ED process indicates that the optimized current density is in the range of 45−60 mA cm −2 and the optimal membranes are CMV/AMV. The current density of 60 mA cm −2 can achieve a high recovery ratio (η OH − 92.6%), low energy consumption (2.38 kW h kg −1 ), but a relatively high Al(OH) 4 − leakage ratio (η Al(OH)4 − 15.1%). The EED process indicates that with the optimized current density of 30 mA cm −2 and membrane CMV, the η Al(OH)4 − can be "zero" and the energy consumption can be as low as 2.07 kW h kg −1 , but the treatment capability is low since OH − ions cannot be recovered directly and a single cation exchange membrane is used. The coupling process can combine the advantages of ED and EED, so that the η OH − can keep a high value of 90.9%, the η Al(OH)4 − decreases to a low value of ∼5%, and the energy consumption remains low at 2.25 kW h kg −1 . Overall, the coupling process of ED and EED is an excellent method to separate NaOH from the sodium aluminate solution.

show abstract

Section: Coupling Processmentioning

confidence: 99%

Optimized Process for Separating NaOH from Sodium Aluminate Solution: Coupling of Electrodialysis and Electro-Electrodialysis

Yan

2015

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…They therefore suggested that the best strategy is to integrate BMED and ion-exchange. They also suggested using conventional ED to concentrate the organic salts in the feed stream first, and then feed the concentrated organic salts to BMED to produce the organic acids (Wang et al ., 2010). The integrated process could achieve a high current efficiency (higher than 100%) and lower the energy consumption and overall process cost.…”

Section: Electrodialysismentioning

confidence: 99%

Extraction‐Fermentation Hybrid (Extractive Fermentation)

Yang

Lu²

2013

Separation and Purification Technologies in Biorefineries

View full text Add to dashboard Cite

“…[18] Roughly speaking, two categories can be divided according to the utilized proton sources, including the in situ production of protons and extra input of inorganic acids. The typical representatives of the former case are EED technology [19][20][21] and BMED technology [22][23][24][25][26][27] , in which the protons are generated by means of electrode reactions and solvent split, respectively. For the latter case, represented by electrometathesis (EMT) [28] , the weak organic acid can be produced from its corresponding organic salt via double composition reaction with the additional strong inorganic acid.…”

Section: Introductionmentioning

confidence: 99%

A win-win strategy for the reclamation of waste acid and conversion of organic acid by a modified electrodialysis

Jia

Chen

Wang

et al. 2016

Separation and Purification Technology

View full text Add to dashboard Cite

In view of some inherent problems, such as the high mobility of protons and low dissociation degrees of organic acid, the conventional electrodialysis technology must be improved before being applied widely in the related fields. In this work, a win-win strategy for simultaneously reclaiming industrial waste acid and producing organic acid by ion substitution electrodialysis (ISED) was put forward. Above all, the ISED technology was further investigated, including its universality and work performance influenced by the membrane selection. Subsequently, a modified ISED was developed and applied in the conversion of acetic acid using the simulated waste acid effluent as proton source. The experiments indicated that a much better work performance, including improved current efficiency and conversion rate and reduced energy consumption, can be achieved when compared to the conventional technology. Especially, it was observed that the content of electro-migrated metal ions in the produced organic acid was so low that a high purity organic acid product can be easily obtained after a simple post-treatment.

show abstract

Integration of conventional electrodialysis and electrodialysis with bipolar membranes for production of organic acids

Cited by 68 publications

References 13 publications

Optimized Process for Separating NaOH from Sodium Aluminate Solution: Coupling of Electrodialysis and Electro-Electrodialysis

Optimized Process for Separating NaOH from Sodium Aluminate Solution: Coupling of Electrodialysis and Electro-Electrodialysis

Extraction‐Fermentation Hybrid (Extractive Fermentation)

A win-win strategy for the reclamation of waste acid and conversion of organic acid by a modified electrodialysis

Contact Info

Product

Resources

About