原位担载Fe2S3催化剂煤的热解动力学研究

用加壓熱天平研究了原位擔載納米級Fe2 S3 催化劑的大柳塔次煙煤的加氫熱解動力學 ,考查了 2 0MPa氫氣氛或氮氣氛下原煤及擔載催化劑的煤熱解失重過程 ,計算了活化能E和指前因子A等熱解動力學參數。結果表明 ,煤原位擔載Fe2 S3 催化劑后熱失重速率比原煤有較大程度的增加 ,最大熱解速率的特征溫度也比原煤降低。特別是煤在表面活性劑十六烷基三甲基溴化銨溶液中擔載Fe2 S3 催化劑后的熱解反應速率高于水溶液中擔載同樣催化劑的熱解反應速度。原位擔載Fe2 S3 的煤及原煤的熱解反應過程符合一級反應動力學。 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.