Nitrogen monoxide (NO), a major air pollutant, can be directly used as a precursor for nitrogen fertilizer production as long as it is collected in a pure form. In this study, an innovative dual fuel cell system was designed for the efficient capture and collection of pure NOX from industrial flue gases as well as for electricity generation. The system consisted of a methanol/ferric-EDTA fuel cell for NOX capture and a ferrous-EDTA–NO/air fuel cell for captured NOX collection. In a separation operation, the maximum power densities, which were obtained at pH 2 and 20 °C, were 785 and 1,840 mW m−2 in FC1 and FC2, respectively, and increased with temperature. The highest overall outputs from FC1 and FC2 were measured at pH 2, a result that is possibly attributable to the redox potential difference between the anolyte and catholyte in the fuel cells. In the combined operation, ferrous-EDTA–NO prepared in the cathode compartment of FC1 was successfully and efficiently converted to ferric-EDTA and NO in the anode compartment of FC2. The present approach was considered advantageous for advanced NOX reuse technology in the respect that valuable products, such as fertilizer, could be produced.
Dual fuel cell system Ferrous-EDTA–NO NOX reuse Ferric catholyte Metal chelate Selective absorption
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This research was supported by a grant from the Advanced Biomass R&D Center (ABC) of Korea funded by the Ministry of Education, Science and Technology (ABC-2010-0029728).
Solomon S, Portmann RW, Garcia RR, Thomason LW, Poole LR, McCormick MP (1996) The role of aerosol variations in anthropogenic ozone depletion at northern midlatitudes. J Geophys Res 101(D3):6713–6727. doi:10.1029/95JD03353CrossRefGoogle Scholar
Pham EK, Chang SG (1994) Removal of NO from flue gases by absorption to an iron(II) thiochelatecomplex and subsequent reduction to ammonia. Nature 369(6476):139–141. doi:10.1038/369139a0CrossRefGoogle Scholar
Shi Y, Littlejohn D, Chang SG (1996) Integrated tests for removal of nitric oxide with iron thiochelate in wet flue gas desulfurization systems. Environ Sci Technol 30(11):3371–3376. doi:10.1021/es960268jCrossRefGoogle Scholar
Sada E, Kumazawa H, Takada Y (1984) Chemical reactions accompanying absorption of nitric oxide into aqueous mixed solutions of Fe(II)-EDTA and sodium sulfite Ind. Eng Chem Fundam 23(1):60–64. doi:10.1021/i100013a012CrossRefGoogle Scholar
Li W, Wu C-Z, Zhang S-H, Shao K, Shi Y (2007) Evaluation of microbial reduction of Fe(III)EDTA in a chemical absorption biological reduction integrated NOx removal system. Environ Sci Technol 41(2):639–644. doi:10.1021/es061757eCrossRefGoogle Scholar
Zhang SH, Li W, Wu CZ, Chen H, Shi Y (2007) Reduction of Fe(II)EDTA–NO by a newly isolated Pseudomonas sp. strain DN-2 in NOx scrubber solution. Appl Microbiol Biotechnol 76(5):1181–1187. doi:10.1007/s00253-007-1078-6CrossRefGoogle Scholar
van der Maas P, van de Sandt T, Klapwijk B, Lens P (2003) Biological reduction of nitric oxide in aqueous Fe(II)EDTA solutions. Biotechnol Prog 19(4):1323–1328. doi:10.1021/bp030008nCrossRefGoogle Scholar
Dilmore R, Neufel RD, Hammmack RW (2006) Laboratory-scale iron EDTA-based NOx scrubbing process with biological treatment and regeneration of spent scrubber water. Environ Eng Sci 23(5):788–802. doi:10.1089/ees.2006.23.788Google Scholar