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Leaching zinc from spent catalyst: Process optimization using response surface methodology by Zhengyong Zhang; Jinhui Peng; C. Srinivasakannan; Zebiao Zhang; Libo Zhang; Y. Fernández; J.A. Menéndez is a Environmental Science article available to read on EtoBox.
What is Leaching zinc from spent catalyst: Process optimization using response surface methodology about?
The spent catalyst from vinyl acetate synthesis contains large quantity of zinc. The present study attempts to leach zinc using a mixture of ammonia, ammonium carbonate and water solution, after microwave treatment. The effect of important parameters such as leaching time, liquid/solid ratio and the ammonia concentration was investigated and the process conditions were optimized using surface response methodology (RSM) based on central composite design (CCD). The optimum condition for leaching of zinc from spent catalyst was identified to be a leaching time of 2.50 h, a liquid/solid ratio of 6 and ammonia concentration 5.37 mol/L. A maximum of 97% of zinc was recovered under the optimum experimental conditions. The proposed model equation using RSM has shown good agreement with the experimental data, with a correlation coefficient (R 2 ) of 0.95. The samples were characterized before and after leaching using X-ray diffraction (XRD), nitrogen adsorption and scanning electron microscope (SEM).
Who reads Leaching zinc from spent catalyst: Process optimization using response surface methodology?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Zhengyong Zhang; Jinhui Peng; C. Srinivasakannan; Zebiao Zhang; Libo Zhang; Y. Fernández; J.A. Menéndez
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-3894)
- Published
- 2010
- Language
- EN
- Field
- Environmental Science (Physical Sciences)