The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 1996
Filed:
Jul. 24, 1995
Maria Flytzani-Stephanopoulos, Winchester, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A method and system for capturing H.sub.2 S from hot gas streams such as from a coal or other fuel gasifier are disclosed. Zinc or zinc oxide precursors in gas, liquid, or fine powder form are injected into the hot duct work of coal gasifier exit after fly ash has been removed to react with H.sub.2 S gas. In addition to ZnO sulfidation, a portion of the Zn-based reagents converted to the vapor state in the reducing fuel gas environment, reacts with H.sub.2 S and forms fine ZnS particles that are then collected on a high efficiency, high temperature filter. Periodically, the filter is backflushed, and spent sorbent is collected in a hopper, removed for regeneration, and returned to the injection system.