Patent ID: 6248218
Filing Date: 2001-06-19
Classification: C01B,Y02E,Y02P

Abstract:
A method of recovering sulfur from hydrogen sulfide(H.sub.2 S) waste streams using a photochemical process in a closed cycle system with semiconductor photocatalyst particulates, comprising the steps of:(a) producing hydrogen sulfide (H.sub.2 S) having a first pH level;(b) raising the first pH level of the hydrogen sulfide(H.sub.2 S) to a second pH level being higher than the first pH level;(c) interacting the hydrogen sulfide having the second pH level with a photocatalyst particulate; and(d) applying light to the photocatalyst particulate and the hydrogen sulfide to separate hydrogen from sulfur; and(e) recycling steps (a), (b), (c) and (d), so that the separated hydrogen can be recycled in a closed cycle system.