4. Suppose that you are the engineer in the charge of the
gasification section of the Acme Substitute Natural Gas Company.
ASNG Co. runs fixed-bed, dry-ash gasifiers. The raw gas is cleaned,
shifted, and sent to a methane synthesis unit. Every morning you
receive a report from ASNG’s analytical laboratory on the
characteristics of the coal that will be fed to the gasifiers
during the next day’s operations. One important characteristic is
the ash fusion temperature (AFT), i.e., the temperature...