Microbial reverse-electrodialysis chemical-production cell for acid and alkali production

Xiuping Zhu, Marta C. Hatzell, Roland D. Cusick, Bruce Ernest Logan

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A new type of bioelectrochemical system, called a microbial reverse-electrodialysis chemical-production cell (MRCC), was developed to produce acid and alkali using energy derived from organic matter (acetate) and salinity gradients (NaCl solutions representative of seawater and river water). A bipolar membrane (BPM) was placed next to the anode to prevent Cl- contamination and acidification of the anolyte, and to produce protons for HCl recovery. A 5-cell paired reverse-electrodialysis (RED) stack provided the electrical energy required to overcome the BPM over-potential (0.3-0.6 V), making the overall process spontaneous. The MRCC reactor produced electricity (908 mW/m2) as well as concentrated acidic and alkaline solutions, and therefore did not require an external power supply. After a fed-batch cycle, the pHs of the chemical product solutions were 1.65 ± 0.04 and 11.98 ± 0.10, due to the production of 1.35 ± 0.13 mmol of acid, and 0.59 ± 0.14 mmol of alkali. The acid- and alkali-production efficiencies based on generated current were 58 ± 3% and 25 ± 3%. These results demonstrated proof-of-concept acid and alkali production using only renewable energy sources.

Original languageEnglish (US)
Pages (from-to)52-55
Number of pages4
JournalElectrochemistry Communications
Volume31
DOIs
StatePublished - Jun 1 2013

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Electrodialysis
Alkalies
Acids
Membranes
Acidification
Seawater
Biological materials
Protons
Anodes
Acetates
Contamination
Electricity
Rivers
Recovery
Water

All Science Journal Classification (ASJC) codes

  • Electrochemistry

Cite this

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abstract = "A new type of bioelectrochemical system, called a microbial reverse-electrodialysis chemical-production cell (MRCC), was developed to produce acid and alkali using energy derived from organic matter (acetate) and salinity gradients (NaCl solutions representative of seawater and river water). A bipolar membrane (BPM) was placed next to the anode to prevent Cl- contamination and acidification of the anolyte, and to produce protons for HCl recovery. A 5-cell paired reverse-electrodialysis (RED) stack provided the electrical energy required to overcome the BPM over-potential (0.3-0.6 V), making the overall process spontaneous. The MRCC reactor produced electricity (908 mW/m2) as well as concentrated acidic and alkaline solutions, and therefore did not require an external power supply. After a fed-batch cycle, the pHs of the chemical product solutions were 1.65 ± 0.04 and 11.98 ± 0.10, due to the production of 1.35 ± 0.13 mmol of acid, and 0.59 ± 0.14 mmol of alkali. The acid- and alkali-production efficiencies based on generated current were 58 ± 3{\%} and 25 ± 3{\%}. These results demonstrated proof-of-concept acid and alkali production using only renewable energy sources.",
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Microbial reverse-electrodialysis chemical-production cell for acid and alkali production. / Zhu, Xiuping; Hatzell, Marta C.; Cusick, Roland D.; Logan, Bruce Ernest.

In: Electrochemistry Communications, Vol. 31, 01.06.2013, p. 52-55.

Research output: Contribution to journalArticle

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