Purification of carbon dioxide

US10254042B2 · kind B2 · utility

Assignee

• AIR PRODUCTS AND CHEMICALS, INC. · US

Inventors

• Paul Higginbotham · Guildford, GB
• Galip Hakan Guvelioglu · Macungie, US
• John Eugene Palamara · Macungie, US
• Vincent White · Ashtead, GB

Key dates

• Filing date: Oct 25, 2013
• Grant date: Apr 9, 2019
• Expiry date: Jun 10, 2037

Classification

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

Abstract

In a process for separating at least one “heavy” impurity such as hydrogen sulfide from crude carbon dioxide comprising significant quantities of at least one “light” impurity such as non-condensable gases, involving at least one heat pump cycle using carbon dioxide-containing fluid from the process as the working fluid, the “light” impurity is removed from the crude carbon dioxide and carbon dioxide is subsequently recovered from the removed “light” impurity, thereby improving overall carbon dioxide recovery and efficiency in terms of energy consumption.