Battelle Memorial Institute

James E Rainbolt

David J Heldebrant

Phillip K Koech

Mark D Bearden

Feng Zheng

John C Linehan

A system, method, and material that enables the pressure-activated reversible chemical capture of acid gasses such as COfrom gas volumes such as streams, flows or any other volume. Once the acid gas is chemically captured, the resulting product typically a zwitterionic salt, can be subjected to a reduced pressure whereupon the resulting product will release the captures acid gas and the capture material will be regenerated. The invention includes this process as well as the materials and systems for carrying out and enabling this process.

System and process for capture of acid gasses at elevated pressure from gaseous process streams

A system and process are disclosed for selective removal and recovery of HS from a gaseous volume, e.g., from natural gas. Anhydrous organic, sorbents chemically capture HS gas to form hydrosulfide salts. Regeneration of the capture solvent involves addition of an anti-solvent that releases the captured HS gas from the capture sorbent. The capture sorbent and anti-solvent are reactivated for reuse, e.g., by simple distillation.

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Wenatchee, WA, United States of America

James E Rainbolt