Temperature vacuum swing adsorption process suited for carbon capture to regenerate sorbents using the CO2 product gas as the heat transfer medium

US11654393B2 · kind B2 · utility

Assignee

• CARBON CAPTURE INC. · US

Inventors

• Saeb Besarati · Los Angeles, US
• William Gross · Pasadena, US
• Brian Holman · Los Angeles, US
• Eric Colbert · Los Angeles, US
• Dan Fang · Los Angeles, US

Key dates

• Filing date: Aug 29, 2022
• Grant date: May 23, 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

Solid sorbents, and especially zeolites, are attractive candidates for CO2 direct air capture (DAC) and point source capture applications because of their potential for high selectivity, fast kinetics, and low energy CO2 capture cycles. A common issue with solid sorbents, including zeolites, is their low thermal conductivity, which makes them difficult to heat for regeneration without using complex and expensive heat transfer systems. This invention utilizes a modified TVSA process which utilizes the product CO2 gas itself as the heating medium for the adsorbent bed, alone or in conjunction with internal or external heaters. The use of CO2 as a heating medium allows efficient heating of the sorbent bed and enables high purity CO2 product.