Leaching of palladium and rhodium from spent automobile catalysts by microwave roasting

Authors

  • Shixing Wang,

    Corresponding author
    1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, People's Republic of China
    2. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming, People's Republic of China
    3. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming, People's Republic of China
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  • Anran Chen,

    1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, People's Republic of China
    2. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming, People's Republic of China
    3. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming, People's Republic of China
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  • Zebiao Zhang,

    1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, People's Republic of China
    2. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming, People's Republic of China
    3. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming, People's Republic of China
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  • Jinhui Peng

    1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, People's Republic of China
    2. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming, People's Republic of China
    3. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming, People's Republic of China
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Abstract

Leaching of palladium and rhodium from spent automobile catalysts by microwave roasting was investigated. The results indicated that leaching efficiency was obviously improved, the roasting temperature was remarkably reduced and the leaching time was shortened by microwave roasting. Microwave destroys the coatings on platinum group metals and increases the effective contact area of the solid–liquid reaction. The leaching rate was accelerated at low microwave roasting temperatures. The leaching ratio of Pd and Rh was about 99.74 and 94.79%, respectively. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 913–917, 2014

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