Method of preventing metal dusting corrosion of ducts which conduct hot gas mixtures containing carbon monoxide

US5935517A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Werner Roll · Merkendorf, DE
• Friedrich Hohmann · Langen, DE

Key dates

• Filing date: Jan 25, 1996
• Grant date: Aug 10, 1999
• Expiry date: Jan 25, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10K1/043
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A carbon monoxide containing gas mixture at a temperature of 500.degree. C. is conducted through the inner protective tubing of a sheath tube lined with a thermally insulating protecting composition. The inner tubing is divided into sections and a potentially CO-free mass is introduced in the sheath tube in the regions of the thermally insulating mass to permeate the latter and form a barrier between the carbon monoxide gas and sheath tube, thereby eliminating hot spots and metal dusting corrosion.