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Electrochemical membrane flue‐gas desulfurization: K 2 SO 4 /V 2 O 5 electrolyte
Author(s) -
Schmidt Douglas S.,
Winnick Jack
Publication year - 1998
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690440210
Subject(s) - electrolyte , flue gas desulfurization , electrochemistry , current (fluid) , flue gas , chemistry , current density , molten salt , analytical chemistry (journal) , inorganic chemistry , chemical engineering , electrode , thermodynamics , chromatography , organic chemistry , physics , quantum mechanics , engineering
The viability of a new electrolyte was demonstrated in the bench‐scale electrochemical removal of SO x from flue‐gas streams at high temperatures. At current densities up to 20 A/m 2 , approximately 99% current efficiciency was achieved when removing 90% of inlet SO x at 480°C. As current densities increased to 100 A/m 2 , current efficiencies were 64% at 480°C and 73% at 520°C. While species present in this K 2 SO 4 /V 2 O 5 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.