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Received June 1, 2012
Accepted August 22, 2012
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Aqueous processing of nickel spent catalyst for a value added product
Abdul Rauf Sheik†
Malay Kumar Ghosh
Kali Sanjay
Tondepu Subbaiah
Barada Kanta Mishra
Abdullahi Aalafara Baba1
CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India 1Chemistry Department, University of Ilorin, P.M.B. 1515, Ilorin 240003, Nigeria
abdul@immt.res.in
Korean Journal of Chemical Engineering, February 2013, 30(2), 400-404(5), 10.1007/s11814-012-0143-8
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Abstract
Nickel was recovered from a fertilizer industry spent catalyst by leaching with nitric acid followed by nickel hydroxide precipitation. The optimization of temperature, initial acid concentration and particle size for leaching of the spent catalyst was done through 23 factorial design. A maximum extraction of 91.9% was achieved at 90 ℃, 1.5M HNO3 and 62.5 μm particle size. Temperature and acid concentration showed positive effect, while particle size showed no effect. A regression equation was developed and employed to predict conditions for 100% extraction which were_x000D_
experimentally tested. Nickel hydroxide was electrochemically precipitated from the leach liquor and its maximum discharge capacity was found to be 155 mAh/g. A 3-stage counter current leaching circuit was designed to obtain a leach liquor of suitable pH. XRD characterization of the precipitated Ni(OH)2 shows to consist of both α- and β-forms.
Keywords
References
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Abdel-Aal EA, Int. J. Nanopart., 4, 77 (2011)
Abdel-Aal EA, Dietrich D, Steinhauser S, Lampke T, J.Electrochem. Plating Technol., 3, 29 (2011)
El-Shall H, Jeon JH, Abdel-Aal EA, Khan S, Gower L, Rabinovich Y, Cryst. Res. Technol., 39, 214 (2004)
Abdel-Aal EA, Rashad MM, El-Shall H, Cryst. Res. Technol., 39, 313 (2004)
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Rashad MM, Mahmoud MHH, Ibrahim IA, Abdel-Aal EA, J. Cryst. Growth, 267(1-2), 372 (2004)
Rashad MM, Mahmoud MHH, Ibrahim IA, Abdel-Aal EA, Cryst. Res. Technol., 40, 739 (2005)
El-Shall H, Rashad MM, Abdel-Aal EA, Cryst. Res. Technol., 40, 860 (2005)
Abdel-Aal EA, Daosukho S, El-Shall H, J. Cryst. Growth, 311(9), 2673 (2009)
Abdel-Aal EA, Rashad MM, Mohammed RM, Int. J.Nanopart., 3, 192 (2010)
Sayan E, Bayramoglu M, Hydrometallurgy., 57, 181 (2000)
Montgomery DC, Design and analysis of experiments, John Wiley and Sons, New Jersey (2005)
Vogel AI, Textbook of Quantitative Inorganic Analysis Including Elementary Instrumental Analysis, ELBS 4th Ed. (1978)
Akhnazarva S, Kafarov V, Experimental Optimisation in Chemistry and Chemical Engineering, Mir, Moscow (1982)
Chakkaravarthy C, Periasamy P, Jegannathan S, Vasu KI, J.Power Sources., 35, 21 (1991)
Barnard R, Randell CF, Tye FL, J. Appl. Electrochem., 10, 109 (1980)
Portemer F, Delahaye-Vidal A, Figlarz M, J. Electrochem. Soc., 139, 671 (1992)
