کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
179296 459344 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microbial reverse-electrodialysis chemical-production cell for acid and alkali production
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Microbial reverse-electrodialysis chemical-production cell for acid and alkali production
چکیده انگلیسی


• New bioelectrical system to produce acid and alkali without external power
• The product solutions had pHs of 1.65 ± 0.04 and 11.98 ± 0.10.
• System produced 908 mW/m2 in addition to chemical products.
• The use of a bipolar membrane avoided acidification of anolyte.
• Little cross-over of chloride ions was observed into product streams.

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 31, June 2013, Pages 52–55
نویسندگان
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