Development of Continuous Monitoring System for Gas Generation Behavior during Coking Reaction

Abstract

For characterizing coking reaction, it can be important information to realize gas generation behavior on pyrolysis of coal. In this study, a new monitoring system for gas generation behavior during coking reaction has been established. This system consists of main three parts, carrier gas supplier part, reaction part with a tube in an electric furnace and detector part of Fourier-transform infrared spectroscopic analyzer (FT-IR) and of a sensor for hydrogen. Coal sample in nitrogen flow was heated with an electric furnace, and generated gas was lead to FT-IR and a gas sensor with nitrogen gas carrier. This method has a good time-resolved of second order, so that a short time reaction of coal pyrolysis can be monitored continuously. Using this system, different gas profiles on coking reaction of two coals with opposite characters could be obtained. This system is great effective in detailed characterization of coal pyrolysis, because it is able to monitor continuously the reaction with in-situ to high temperature (more than 600°C) it cannot be examined by any other methods.