Nitrogen gas selectivity enhancement on nitrate denitrification using nanoscale zero-valent iron supported palladium/copper catalysts

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Title:	Nitrogen gas selectivity enhancement on nitrate denitrification using nanoscale zero-valent iron supported palladium/copper catalysts
Authors:	Lubphoo, Yingyote Chyan, Jih-Ming Grisdanurak, Nurak Liao, Chih-Hsiang
Contributors:	環境資源管理系
Keywords:	denitrification catalyticnitratereduction nanoscalezero-valentiron trimetal nitrogengasselectivity pseudo-second-orderreaction
Date:	2015-12
Issue Date:	2016-04-19 19:04:54 (UTC+8)
Publisher:	Elsevier Science Bv
Abstract:	Nanocomposite trimetals, (Cu-Pd)-nFe(0) and (Pd-Cu)-nFe(0), were used for enhancing both nitrogen gas selectivity and nitrate removal. The initial pH, temperature and initial nitrate concentration were investigated as variable parameters in this study. It was found that the trimetal (Pd-Cu)-nFe(0) (10% (Pd-Cu) loading and 2:1 (Pd:Cu) ratio) is promising under the conditions of 50 degrees C, pH 7 and 100 mg NO3-/L; its largest N-2 gas selectivity was 60.5%, and NO3- removal 90%. Based on the kinetic analysis, pseudo-second-order reaction was closely followed under the studied conditions. Higher nitrate removal rate was observed under acidic and high temperature conditions. The activation energy of nitrate reduction over the temperature range of 20-50 degrees C was 51.0 kJ mol(-1)
Relation:	Journal of The Taiwan Institute of Chemical Engineers, v.57, pp.143-153
Appears in Collections:	[Dept. of Environmental Resources Management] Periodical Articles

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