Tubular heater for preparing carbon monoxide-containing gas mixtures

US5490974A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Friedrich Hohmann · Langen, DE
• Werner Roll · Merkendorf, DE
• Hans G. Mortel

Key dates

• Filing date: Jul 27, 1994
• Grant date: Feb 13, 1996
• Expiry date: Jul 27, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B2203/1241
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The tubular heater comprises numerous tubes, which are disposed in a combustion chamber and contain catalyst. A synthesis gas, which mainly comprises hydrogen, carbon monoxide, and carbon dioxide, is prepared in the tubes. There is a risk of a formation of carbides (metal dusting corrosion) on the outside surface of the outlet ends of the tubes. To prevent such corrosion, a gaseous or vaporous protecting fluid, which is substantially free of CO, is supplied to the region surrounding the outlet ends of the tubes.