Process for sulphur recovery with concurrent hydrogen production from NH3 containing feed

US10046967B2 · kind B2 · utility

Assignee

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

Inventors

• Michele COLOZZI · Roma, IT
• Lucia Barbato · Roma, IT
• Fabio Angelini · Roma, IT
• Emma Palo · Battipaglia, IT
• Vincenzo Palma · Mercato San Severino, IT
• Vincenzo Vaiano · Mercato San Severino, IT

Key dates

• Filing date: Nov 8, 2013
• Grant date: Aug 14, 2018
• Expiry date: Mar 8, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/36
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is a method for the production of hydrogen from a H2S-containing gas stream also containing ammonia, comprising subjecting both gas stream to catalytic oxidative cracking of both the H2S and the NH3, so as to form H2, S2 and N2. In this method, preferably, an additional amount of oxygen is added as compared to the amount used for H2S catalytic oxidative cracking. Also, preferably, the contact time of the gas stream with the catalyst is increased. The catalyst preferably is provided as a single bed, and then preferably comprises iron and molybdenum supported by a carrier comprising aluminum. The preferred carrier is alumina. The iron and molybdenum preferably are in the form of sulfides.