Zinc oxide based sorbent and process for preparing same

Patent · Tue Nov 08 00:00:00 EST 2022

OSTI ID:1986802

Shen, Jian-Ping; Norman, Jason S.; Turk, Brian S.; Gupta, Raghubir

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 (ZnAl₂O₄) phase. Each of the two phases is characterized by a relatively small crystallite size of typically less than about 50 nm (500 Angstroms). Preferably the sorbents are prepared by using an alkali metal base to convert a precursor mixture, containing a precipitated zinc oxide precursor and a precipitated aluminum oxide precursor, to the two-phase, active zinc oxide containing component, with the resulting sorbent having a sodium level within a desired range.

• Research Organization: Research Triangle Institute, Research Triangle Park, NC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: FE0000489
• Assignee: Research Triangle Institute (Research Triangle Park, NC)
• Patent Number(s): 11,491,457
• Application Number: 16/635,790
• OSTI ID: 1986802
• Resource Relation: Patent File Date: 08/01/2018
• Country of Publication: United States
• Language: English