Measurement of evolved gas resulting from closed-system pyrolysis of foundry core binders

Abstract

The quantity of gas generated by pyrolysis of a foundry core binder during casting operations is of practical importance to the foundry industry. A method for measuring the gas volume was developed using a DuPont 951 TGA furnace system; this method eliminates many of the errors inherent in some of the traditional methods. The incorporation of an extrapolation technique eliminates the dependence of the final result on sample size. This method was found to be rapid, highly reproducible, and insensitive to the nature of the atmosphere in the pyrolysis chamber.