Process for producing biomethane from a biogas stream, comprising solidification of the impurities

US11525628B2 · kind B2 · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Guillaume CARDON · Poissy, FR
• Antonio Trueba · Paris, FR
• Solene Valentin · Meudon, FR

Key dates

• Filing date: Sep 25, 2019
• Grant date: Dec 13, 2022
• Expiry date: May 15, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E50/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for producing biomethane from a biogas stream including methane, carbon dioxide and at least one impurity chosen from ammonia, volatile organic compounds, water, sulfur-based impurities (H2S) and siloxanes. A biogas stream is dried, the at least one impurity is at least partially removed by solidification and removal of the impurity. The methane and the carbon dioxide contained in the biogas obtained from the second step are separated so as to produce a biomethane stream and a CO2 stream.