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首页> 外文期刊>International Journal of Oil, Gas and Coal Technology: IJOGCT >Thermal and kinetic characteristics of the catalytic effect of different catalysts on the combustion of coal-char blends
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Thermal and kinetic characteristics of the catalytic effect of different catalysts on the combustion of coal-char blends

机译：不同催化剂对煤炭混合物燃烧的催化作用的热敏和动力学特征

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摘要

Thermal and kinetic characteristics of the catalytic effect of CaO/MnO2/Fe2O3 on the combustion of coal-char blends were investigated with thermogravimetric analysis. Different characteristic parameters obtained from TG-DTG curves were used to determine the combustion characteristic of samples. A sectioning method was adopted to study the kinetics at the stage I and II of samples combustion. The kinetic parameters of samples were also determined according to the Coats-Redfern method. The experimental results indicated that, in stage I, the catalysts promoted volatile matter release and combustion decreased the ignition temperature; in stage II, the catalysts accelerated the combustion of fixed carbon in char. The ignition properties and the combustion properties all increased with catalysts addition. Fe2O3 and CaO exhibited effective catalytic effect on reducing the activation energy in the stage I and II of coal-char blends combustion. The catalytic effect of MnO2 in the stage II was not obvious. Therefore, Fe2O3 and CaO were considered having more catalytically active than MnO2 in coal-char blends combustion.
机译：采用热重分析研究了CaO / MnO2 / Fe2O3对煤炭混合物燃烧的催化作用的热敏和动力学特性。从TG-DTG曲线获得的不同特征参数用于确定样品的燃烧特性。采用分切法研究样品燃烧阶段和II阶段的动力学。还根据涂层 - 铁丝法测定样品的动力学参数。实验结果表明，在阶段I中，催化剂促进挥发性物质释放，燃烧降低了点火温度;在第II阶段，催化剂加速了固定碳在炭中的燃烧。点火性能和燃烧性能随催化剂添加而增加。 Fe2O3和CaO表现出有效的催化效应降低煤炭混合燃烧的阶段I和II中的活化能量。 MNO2在阶段II中的催化作用不明显。因此，考虑Fe 2 O 3和CaO在煤炭共混燃烧中具有比mnO 2更催化的活性。

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