Zero emissions sulphur recovery process with concurrent hydrogen production

US10654719B2 · kind B2 · utility

Assignee

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

Inventors

• Lucio Molinari · Milano, IT
• Fabio Angelini · Roma, IT
• Lucia Barbato · Roma, IT

Key dates

• Filing date: Dec 23, 2015
• Grant date: May 19, 2020
• Expiry date: Dec 23, 2035

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 zero emissions. The method comprises the thermal oxidative cracking of H2S so as to form H2 and S2. Preferably, the oxidation is conducted using oxygen-enriched air, preferably pure oxygen. The ratio H2S/O2 in the feedstock is higher than 2:1, preferably in the range of 3:1-5:1.