Process for desulfurizing a H.sub.2 S-containing gas

US5762899A · kind A · utility

Assignee

• Metallgesellchaft Aktiengesellschaft · DE

Inventors

• Klaus Stetzer · Dreieich, DE
• Wolfgang Willing · Mellrichstadt, DE

Key dates

• Filing date: Jul 1, 1997
• Grant date: Jun 9, 1998
• Expiry date: Jul 1, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The H.sub.2 S-containing gas is passed through at least one bed of a catalyst rich in metal oxide and subsequently through a final cleaning bed. On the catalyst rich in metal oxide and in the final cleaning bed elementary sulfur is deposited, which is removed by a regeneration treatment carried out periodically. The final cleaning bed constitutes a filter bed for the adsorption of elementary sulfur and consists of a granular adsorbent, which is different from the catalyst rich in metal oxide. A gas coming from the catalyst rich in metal oxide is supplied to the filter bed at temperatures in the range from 20.degree. to 180.degree. C., which gas contains at least 250 mg elementary sulfur per Nm.sup.3 gas. From the filter bed a desulfurized gas is withdrawn, whose content of elementary sulfur is not more than 30% of the content of elementary sulfur when entering the filter bed.