Zero emissions sulphur recovery process with concurrent hydrogen production

US9981849B2 · kind B2 · utility

Assignee

• STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTER · NL

Inventors

• Fabio Angelini · Roma, IT
• Lucia Barbato · Roma, IT

Key dates

• Filing date: Jan 6, 2016
• Grant date: May 29, 2018
• Expiry date: Jan 29, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/129
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is a process for the concurrent production of hydrogen and sulphur from a H2S-containing gas stream, with reduced, and preferably zero, emissions. The method comprises the catalytic oxidative cracking of H2S so as to form H2 and S2. Preferably, the oxidation is conducted using oxygen-enriched air, preferably pure oxygen. The process is conducted in a reaction chamber comprising a bifunctional catalyst material, so as to favor both the partial oxidation of H2S and the dissociation thereof.