Development of Continuous Monitoring System with FT-IR for Gas Generation Behavior in Coke Oven

A continuous monitoring system for gas generation in coke oven has been established with the Fourier-transform infrared spectroscopic analyzer (FT IR) as a detector. Coke oven gas (COG) was sampled in an ascension pipe by a pump. COG, passed through traps for removing tar and mist, was led to the detector located about 20 m from the sampling position. COG was monitored with 50 times dilution by nitrogen gas because the concentrations of component gases are too high for the FT IR measurement. Using this system, the COG of a coke oven was measured continuously for about 20 h. By monitoring the generation behavior of COG, it was possible to characterize the details of the coking reaction in a coke oven. It was shown that different combinations of coals result in different COG generation behavior.