公开(公告)号：US20230067004A1

公开(公告)日：2023-03-02

申请号：US17759654

申请日：2021-01-26

Applicant: Research Triangle Institute

Inventor： Paul MOBLEY ,  Shaojun James ZHOU ,  Samuel John THOMPSON ,  Jak TANTHANA ,  Aravind Villava Rayer RABINDRAN ,  Marty LAIL

IPC: C02F1/28 ,  B01J20/20 ,  B01J20/28 ,  B01J20/34 ,  B01D53/14

Abstract: A method for reducing the concentration of amines in a wash liquid stream exiting a wash section in an acid gas scrubbing process includes introducing the wash liquid stream exiting the wash section of the acid gas scrubbing process to an adsorbent material, wherein the wash liquid stream has a first concentration of amines. The wash liquid stream having the first concentration of amines is flowed through the adsorbent material, and the adsorbent material retains at least a portion of the amines thereby providing a wash liquid stream having a second, reduced concentration of amines. The wash stream with reduced concentration of amines is recycled back to the wash section to remove amines more effectively from the acid gas being scrubbed. The adsorbent material can be regenerated for reuse. Amine recovered from the regenerated adsorbent material can be recycled to the process for reuse.

公开(公告)号：US20230001348A1

公开(公告)日：2023-01-05

申请号：US17782296

申请日：2020-12-09

Applicant: Research Triangle Institute

Inventor： Jak TANTHANA ,  Shaojun James ZHOU ,  Paul MOBLEY ,  Vijay GUPTA ,  Marty LAIL ,  Aravind Villava Rayer RABINDRAN ,  Thomas GOHNDRONE

IPC: B01D53/14 ,  C10L3/10

Abstract: A non-aqueous solvent system configured to remove acidic gas from a gas stream comprises a solution formed of a chemical absorption component and a physical absorption component. The chemical absorption component includes a nitrogenous base, wherein the nitrogenous base has a structure such that it reacts with a portion of the acidic gas. The physical absorption component includes an organic diluent that is non-reactive with the acidic gas and that has a structure such that it absorbs a portion of the acidic gas at a pressure above atmospheric pressure. The solvent system has a solubility with water of less than about 10 g of solvent per 100 mL of water.