Continuous processes and systems to reduce energy requirements of using zeolites for carbon capture under humid conditions

US11738301B2 · kind B2 · utility

Assignee

• CARBON CAPTURE INC. · US

Inventors

• Brian Holman · Los Angeles, US
• William Gross · Pasadena, US
• Andrea Pedretti · Thousand Oaks, US
• Saeb Besarati · Los Angeles, US
• Alex Welch · Los Angeles, US
• Dan Fang · Los Angeles, US

Key dates

• Filing date: Aug 29, 2022
• Grant date: Aug 29, 2023
• Expiry date: Aug 29, 2042

Classification

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

Abstract

The direct air capture (DAC) systems and methods efficiently and economically regenerate a desiccant bed without adding any thermal energy and without requiring any pressurization or depressurization of the desiccant reactors. The methods leverage water concentration differences in stream flows, the water concentration profile across a desiccant bed, and, optionally, exothermic water adsorption. These three elements, working in combination, are referred to as “reverse dry flow regeneration” or a “reverse dry air swing” regeneration process. Systems and methods for reverse flow regeneration include those for CO2 DAC applications, but they are also applicable to point source carbon capture and other similar technologies that require initial gas dehydration before exposure to a hydrophilic material.