期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 169, 期 1-3, 页码 240-245出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2009.03.079
关键词
Recovery; Rare metal compound; Nickel-metal hydride battery; CH4 dry reforming; Catalysis
资金
- Ministry of the Environment [K1615, K1731, K1849]
- Japan Society for the Promotion of Science [17350101]
- Okayama University 21st Century COE Program Strategic Solid Waste Management for a Sustainable Society
- Grants-in-Aid for Scientific Research [17350101] Funding Source: KAKEN
The recovery of valuable components such as nickel from nickel-metal hydride (Ni-MH) battery waste by chemical processes and their applications to CH4 dry reforming catalysts were investigated. Three types of compound, identified by XRD analysis as NiO, CeO2 and LaCoO3 phases, were successfully separated from the waste by a series of chemical processes at room temperature using aqueous solutions of HCl, NaOH and NH3, and Ni component of approximate to 70% in Ni-MH battery waste was recovered. The separated NiO, CeO2 and LaCoO3 showed catalytic activities for CH4 dry reforming. In particular, the separated NiO easily reduced to Ni-0 at an initial stage, and exhibited excellent catalytic activity in terms of CH4 conversion and stability. Furthermore, it was found that the resulting Ni from separated NiO exhibited an anomalous catalysis from the comparison with that from regent NiO. (C) 2009 Elsevier B.V. All rights reserved.
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