Effective Utilization Of Waste: Development Of
CH4 Dry Reforming Catalysts From Spent Nickel
Metal Hydride Battery For Resource Recovery
Author(s)
T. Kanamori, R. Hayashi, M. Matsuda & M. Miyake
Abstract
The resource recovery of nickel metal from the spent nickel metal hydride (Ni-
MH) battery was investigated by using the CH4 dry reforming, aiming at reusing
it as a raw material of the Ni-MH battery. From the results, a compound
identified as a single phase of NiO by XRD was successfully prepared from the
spent Ni-MH battery by a series of chemical processes using HCl and NH3 aq.
solutions followed by calcinations. The resulting NiO exhibited excellent CH4
conversion in the CH4 dry reforming, i.e., the CH4 conversion higher than 96%
continued for 50 h when the flow rates of injection gases were controlled at
CH4/CO2/Ar = 10:10:80 ml·min-1. Although the XRD pattern revealed the
reduction of NiO to Ni0 and the deposition of carbon after the CH4 dry
reforming, the deposition of carbon could be suppressed by changing the
injection gas ratio. The resource recovery of nickel metal was, therefore,
concluded to be possible through the CH4 dry reforming over NiO prepared from
the spent Ni-MH battery.
Keywords: resource recovery, nickel metal hydride secondary battery, nickel
metal, CH4 dry reforming, nickel-based catalyst.
1 Introduction
Resource recovery of waste is one of important subjects for sustainable
development. Technological development of resource recovery has, however,
fallen behind, compared with that of creation of high functional materials using
pure raw materials. In the battery field, nickel metal hydride (Ni-MH) batteries
Keywords
resource recovery, nickel metal hydride secondary battery, nickel
metal, CH4 dry reforming, nickel-based catalyst.
Related Book
Other papers in this volume
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