Method and device for upgrading of biogas and hydrogen production from anaerobic fermentation of biological material

US10927008B2 · kind B2 · utility

Assignee

• ZEG POWER AS · NO

Inventors

• Arne Raaheim · Maura, NO
• Julien Meyer · Oslo, NO
• Björg Andresen · Oslo, NO
• Nicola Di Giulio · Oslo, NO
• Öystein Ulleberg · Oslo, NO

Key dates

• Filing date: Jul 7, 2017
• Grant date: Feb 23, 2021
• Expiry date: Jul 7, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/00
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

Method and device for biogas upgrading and hydrogen production from anaerobic fermentation of biological material under production of energy rich gases selected among methane and hydrogen or a combination thereof. The method comprises addition of hydrogen gas to a fermentation step to enhance the methane: CO2 ratio in the raw biogas produced. At least part of the raw biogas is subjected to a step of sorption enhanced reforming without prior separation of CO2, using CaO as an absorbent to capture CO2 from the raw biogas as well as CO2 released in the reforming reaction. CaO is regenerated in an endothermic reaction using heat at least partially provided, directly or indirectly, by the bio-gas to be upgraded, thereby producing substantially pure hydrogen and substantially pure CO2.