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Removal of Hydrogen Sulfide in Terms of Scrubbing Techniques using Silver Nano-Particles

Authors: SeungKyu Shin, Jeong Hyub Ha, Sung Han, JiHyeon Song

Abstract:

Silver nano-particles have been used for antibacterial purpose and it is also believed to have removal of odorous compounds, oxidation capacity as a metal catalyst. In this study, silver nano-particles in nano sizes (5-30 nm) were prepared on the surface of NaHCO3, the supporting material, using a sputtering method that provided high silver content and minimized conglomerating problems observed in the common AgNO3 photo-deposition method. The silver nano-particles were dispersed by dissolving Ag-NaHCO3 into water, and the dispersed silver nano-particles in the aqueous phase were applied to remove inorganic odor compounds, H2S, in a scrubbing reactor. Hydrogen sulfide in the gas phase was rapidly removed by the silver nano-particles, and the concentration of sulfate (SO4 2-) ion increased with time due to the oxidation reaction by silver as a catalyst. Consequently, the experimental results demonstrated that the silver nano-particles in the aqueous solution can be successfully applied to remove odorous compounds without adding additional energy sources and producing any harmful byproducts

Keywords: Silver nano-particles, Scrubbing, Oxidation, Hydrogen sulfide, Ammonia

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1059893

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References:


[1] O. Patricio, "Biofiltration of high concentration of hydrogen sulphide using Thilbacillus thioparus", Process Biochemistry, vol. 39, no. 2, pp. 165-170, Oct. 2003.
[2] G. T. Jeong, "Selection of Biofilter Support for Removing MEK" Korean journal of biotechnology and bioengineering, vol. 21, no. 1, pp. 34-41, Feb. 2006.
[3] C. G. Granqvist, "Nanomaterials for benign indoor environments: Electrochromics for "smart windows", sensors for air quality, and photo-catalysts for air cleaning", Solar Energy materials & Solar Cells, vol. 91, no. 4, pp. 355-365, Feb. 2007.
[4] W. J. A. Schreurs, "Effect of silver ions on transport and retention of phosphate by E. coli.", J. Bacteriol, vol. 152, no. 1, pp. 7-13, Oct. 1982.
[5] N. Hu. Hiroshi, "Theoretical studies on the catalytic activity of Ag surface for the oxidation of olefins", International Journal of Quantum Chemistry, vol.65, no.5, pp. 839-856, Dec. 1998.
[6] C. B. Wang, "Interaction of polycrystalline silver with oxygen, water, carbon dioxide, ethylene, and methanol: in situ Raman and catalytic studies", J. phys. Chem. B, vol. 103, no. 27, pp. 5645-5656, June. 1999.
[7] E. M. Cordi, "Oxidation of volatile organic compounds on a Ag/Al2O3 catalyst", Applied Catalysis" A: General, vol. 151 no. 1, pp. 179-191, Mar. 1997.
[8] G. K. Boreskov, "Oxygen adsorption and the reaction of the adsorbed oxygen with molecular hydrogen on silver films", Vacuum, vol. 177, no. 1, pp. 145-148, Nov. 1967.
[9] M. F. Luo, "Catalyst characterization and activity of Ag-Mn, Ag-Co and Ag-Ce composite oxides for oxidation of volatile organic compounds", Applied Catalysis A: General, vol. 175, no. 1/2, pp. 121-129, Dec. 1998.
[10] S. Kato, "Photocatalytic degradation of gaseous sulfur compounds by silver-deposited titanium dioxide", Applied Catalysis B: evironmental, vol. 57, no. 2, pp. 109-115, Apr. 2005.
[11] T. Sano, "Photocatalytic decomposition of N2O on Highly Dispersed Ag+ ions on TiO2 prepared by Photodeposition", J. of catalysis, vol. 194, no.1, pp. 71-79, Aug. 2000.
[12] M. R. Rahimpour, "Modeling and simulation of ammonia removal from purge gases of ammonia plants using a catalytic Pd-Ag membrane reactor", J. Hazardous Materials, vol. 153, no. 1/2, pp. 557-565, May 2008.