Experimental study on gasification of bituminutesous coal char with CO2 catalysed by Fe (NO3)3

Abstract

Abstract Effect of transition metal Fe(come from analytically pure Fe(NO3)3·9H2O) on Jin Jie coal char isothermal gasification by carbon dioxide in the condition of normal pressure is investigated in a self-built fixed bed reactor. Experimental results show that the gasification activity of Jin Jie coal char increases with the increment of Fe, and the loading saturation level of Fe is 3%. Adding 3% Fe can reduce the gasification temperature by 90°C, and shorten the coal char gasification time by 95 minutesutes. The higher the gasification temperature, the greater the increase in gasification activity factor K and average gasification rate Rm. The parameter K and Rm reach the maximum at 3% catalyst addition at the same gasification temperature. Under a regime constant by chemical reaction, the reaction activation energy and the pre-exponential factor and reaction rate constant are calculated. The reaction rate constan of char loaded Fe increases around three times, and the activation energy constants with the raw char.