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Zinc oxide-based sorbents, and processes for preparing and using
them are provided, wherein the sorbents are preferably used to
remove one or more reduced sulfur species from gas streams. The
sorbents contain an active zinc component, optionally in
combination with one or more promoter components and/or one or more
substantially inert components. The active zinc component is a two
phase material, consisting essentially of a zinc oxide (ZnO) phase
and a zinc aluminate (ZnAl.sub.2 O.sub.4) phase. Each of the two
phases is characterized by a relatively small crystallite size of
typically less than about 500 Angstroms. Preferably the sorbents
are prepared by converting a precursor mixture, containing a
precipitated zinc oxide precursor and a precipitated aluminum oxide
precursor, to the two-phase, active zinc oxide containing
component.