High CO2 to amine adsorption capacity CO2 scrubbing processes

US9028785B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Pavel Kortunov · Flemington, US
• Lisa Saunders Baugh · Ringoes, US
• David C. Calabro · Bound Brook, US
• Michael Siskin · Dover, US

Key dates

• Filing date: Sep 9, 2011
• Grant date: May 12, 2015
• Expiry date: Feb 1, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A CO2 amine scrubbing process uses an absorbent mixture combination of an amine containing a primary amino group CO2 sorbent in combination with a non-nucleophilic relatively stronger base. The weaker base(s) are nucleophilic and have the ability to react directly with the CO2 in the gas stream while the relatively stronger bases act as non-nucleophilic promoters for the reaction between the CO2 and the weaker base. Two moles of CO2 can be taken up by the primary amine groups in a dicarboxylation reaction, affording the potential for a highly efficient scrubbing process.