Black & Veatch Corporation

Black & Veatch Holding Company

Justin A Lamar

David K Stevens

Peter D Clark

A process for removing sulfur from a gas stream is provided in which a plurality of reactor units, each comprising a condenser and reactor, are selectively operable under Claus reaction and cold bed adsorption conditions. The arrangement of reactor units within the plant is periodically changed following a front-middle-back sequencing scheme. This ensures that the final reactor unit in the series utilizes fully cooled catalyst which is most efficient for operation under cold bed adsorption conditions. In addition, the condenser of the final reactor unit in the series operates at or below the freezing point of sulfur thereby permitting even greater sulfur recovery.

Cold bed adsorption sulfur recovery process

Apparatus and methods for recovering sulfur from acid gases. Acid gases containing relatively high amounts of carbonyl sulfide and/or one or more types of mercaptans can be treated in a sulfur recovery system employing an acid gas enrichment zone and a tail gas treatment zone, where partially-loaded sulfur absorbing solvent from the tail gas treatment zone is employed for sulfur absorption in the acid gas enrichment zone. Off-gas from the acid gas enrichment zone can be combined and hydrogenated with a sulfur recovery unit tail gas thereby increasing the total amount of sulfur recovery from the initial acid gas.

Methods and apparatus for sulfur recovery from acid gases

A method for producing hydrogen from a light hydrocarbon gas with the hydrocarbon gas being converted to particulate carbon and hydrogen and thereafter quenched with liquid sulfur with the purified hydrogen being recovered as a product.

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Olathe, KS, United States of America

Justin A Lamar