Considerations in selecting materials for heat exchanger applications in coal gasification plant
Over the years, numerous studies have focused upon establishing the corrosion behaviour of heat resistant alloys in equilibrated gas mixtures. However, at lower temperatures, plant atmospheres are seldom in a state of thermodynamic equilibrium due to their high velocity and short residence time. This paper deals primarily with studies in which candidate heat exchanger alloys have been exposed for up to 2000 hours at 600 C to a nonequilibrated CO-rich sulphidising gas, typical of the type of atmosphere found in a dry-feed entrained slagging gasifier. The role of alloy composition is highlighted and the relationship between these tests and a second series in a model equilibrated gas mixture is briefly discussed.
Bibliographic Reference: Paper presented: Materials issues in heat exchangers and boilers, Loughborough (GB), 17-18 October 1995
Availability: Available from (1) as Paper EN 39515 ORA
Record Number: 199610661 / Last updated on: 1996-06-10
Original language: en
Available languages: en