Diamine solvent system for CO2 capture

US11745137B2 · kind B2 · utility

Assignee

• Battelle Memorial Institute · CH

Inventors

• Deepika Malhotra · Richland, US
• Phillip K. Koech · Richland, US
• David J. Heldebrant · Richland, US
• Vassiliki-Alexandra Glezakou · Richland, US
• Roger J. Rousseau · Richland, US
• Manh Thuong Nguyen · Richland, US
• Robert Perry · Richland, US
• Jordan P. Page · Richland, US
• David C. Cantu · Reno, US

Key dates

• Filing date: Jan 26, 2022
• Grant date: Sep 5, 2023
• Expiry date: Apr 30, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed herein is a method and system for CO2 removal from a gas stream using a diamine solvent having a Formula I R1(R2)N-L1-NH—R3  Formula I. With respect to Formula I, each of R1 and R2 independently is aliphatic, cycloaliphatic, or R1 and R2 together with the nitrogen to which they are attached, form a heterocyclyl ring; L1 is aliphatic, cycloaliphatic, or L1 and R1 together with the nitrogen to which they are attached form a heterocyclyl ring; and R3 is aliphatic, cycloaliphatic, cycloalkylalkyl, or alkoxyalkyl. And/or the compound may have a viscosity of less than 75 cP at a CO2-loading of 40 mol % and at a temperature of 40° C.