Electrochemical membrane flue-gas desulfurization: K2SO4/V2O5 electrolyte

The viability of a new electrolyte was demonstrated in the bench‐scale electrochemical removal of SOx from flue‐gas streams at high temperatures. At current densities up to 20 A/m2, approximately 99% current efficiciency was achieved when removing 90% of inlet SOx at 480°C. As current densities incr...

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Bibliographic Details
Published in:AIChE journal 1998-02, Vol.44 (2), p.323-331
Main Authors: Schmidt, Douglas S., Winnick, Jack
Format: Article
Language:English
Subjects:
Air pollution caused by fuel industries
Applied sciences
Atmospheric pollution
Combustion and energy production
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Pollution
Pollution reduction
Prevention and purification methods
Stack gas and industrial effluent processing
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Summary:The viability of a new electrolyte was demonstrated in the bench‐scale electrochemical removal of SOx from flue‐gas streams at high temperatures. At current densities up to 20 A/m2, approximately 99% current efficiciency was achieved when removing 90% of inlet SOx at 480°C. As current densities increased to 100 A/m2, current efficiencies were 64% at 480°C and 73% at 520°C. While species present in this K2SO4/V2O5 molten salt are not well understood, a simple mechanism was used to develop a model to describe the observed removal results. This model was then used to predict preliminary economic viability of this system based on known electrochemical technology.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.690440210