Recovery of Nickel from Anode Materials of Spent Ni-MH Batteries and Its Catalytic Property for CH_4 Dry Reforming

摘要

Recovery process of Ni from anode materials of spent Ni-MH batteries and application of the resulting Ni to CH_4 dry reforming catalyst were investigated, focusing on availability of Ni. NiO, which formed a solid solution with CoO, was successfully prepared from the waste by a series of chemical processes using aqueous solutions of HCl and NH_3. The resulting NiO, which was reduced to Ni~0, exhibited excellent CH_4 conversion in CH_4 dry reforming. From results, it was concluded that the Ni recovered from anode materials of spent Ni-MH batteries was available for CH_4 dry reforming catalyst.