Thermochemistry of corrosion of ceramic hot gas filters in service

Abstract

A thermochemical database has been prepared for use in predicting high-temperature, high-pressure reaction products of ceramic hot gas filters with a corrosive environment in coal combustion power generating plants. This database has been used to simulate operating conditions of laboratory reactors and existing coal combustion plants to predict the degradation of oxide and non-oxide filters in both oxidizing and reducing atmospheres. The corrosion of silicon carbide and alumina/mullite materials were modeled under normal operating conditions to study the influence of factors such as pressure, temperature and water vapor content. The modeling results were then compared with the limited results available from experiments and field experience.

Keywords:

• corrosion of ceramic hot gas filters