原位担载 Fe₂S₃ 催化剂煤的热解动力学研究

Pyrolytic reaction kinetics of Daliuta coal (DL) and impregnated in-situ Fe₂S₃ within water and surfactant Hexadecyltrimethyl ammonium bromide ( 1 631-Br) on the coal have been studied by Thermogravimetry in a pressurized thermobalance. The TG/DTG profiles were obtained at heating rate of 10 ℃ min. A comparison for TG/DTG profiles and pyrolytic kinetics parameters were made between raw coal and the coals in-situ leaching by Fe₂S₃ catalyst within water and surfactant 1631-Br. Effects of the surfactant on the coal in-situ impregnated with Fe₂S₃ was analyzed, and Zeta potential of the coal in water and the surfactant were determined. And a first order kinetic equation was used for pyrolytic kinetic parameters calculation. The results showed that the coal in-situ loaded Fe₂S₃ catalyst had much lower activation energy than the raw coal, especially activation energy for coal leaching in the surfactant was lower than that within water. The kinetic parameters E and A of raw coal and the coal loaded Fe₂S₃ catalyst were calculated.