07220391 is referenced by 29 patents and cites 20 patents.

Methods and systems for separating hydrogen and sulfur from hydrogen sulfide(H2S) gas. Hydrogen sulfide(H2S) gas is passed into a scrubber and filtration unit with polysulfide solution. Interaction frees elemental sulfur which is filtered, excess continues to a stripper unit where the excess H2S is removed. The excess H2S returns to the scrubber and filtration unit, while the sulfide solution passes into a photoreactor containing a photocatalyst and a light source. The sulfide solution is oxidatively converted to elemental sulfur and complexed with excess sulfide ion to make polysulfide ion, while water is reduced to hydrogen. Hydrogen is released, while the polysulfide solution is fed back to the scrubber unit where the system operation repeats. In a second embodiment, the photocatalyst is eliminated, and the hydrogen sulfide solution is directly illuminated with ultraviolet radiation with a light source such as a low pressure mercury lamp operating at approximately 254 nm.

Title
UV photochemical option for closed cycle decomposition of hydrogen sulfide
Application Number
10/165843
Publication Number
7220391 (B1)
Application Date
June 7, 2002
Publication Date
May 22, 2007
Inventor
Clovis A Linkous
Merritt Island
FL, US
Cunping Huang
Cocoa
FL, US
Agent
Law Offices of Brian S Steinberger P A
Phyllis K Wood
Brian S Steinberger
Assignee
University of Central Florida Research Foundation
FL, US
IPC
B01J 19/08
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