Reactivity of heat-treated coals in air at 500 °C
Reactivity of heat-treated coals in air at 500 °C
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DOI：
10.1016/0016-2361(73)90059-8
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发表时间：
1973-10
期刊：
影响因子：
7.4
通讯作者：
R. Jenkins;S. Nandi;P. Walker
中科院分区：
文献类型：
--
作者：
R. Jenkins;S. Nandi;P. Walker
在控制条件下将21种不同等级的美国煤煅烧至1000 °C，并通过重量法测量所得焦炭或焦炭在500 °C空气中的反应性。反应性位于一个明确定义的带内时，对母煤的等级绘制。低煤阶煤焦比高煤阶煤焦反应活性更高。在极端情况下，蒙大拿州褐煤焦的反应性是从宾夕法尼亚州低挥发性煤中获得的焦的约100倍。研究了三种煤的反应性随热处理温度（600 ~ 1000 °C）的变化。随着热处理温度的升高，反应性降低。一些结果的矿物质和孔隙结构的反应性参数的影响。含有高浓度镁和钙杂质的焦炭最具反应性。煤焦中宏观孔隙和过渡孔隙的数量对反应性有显著影响。
Twenty one US coals, of widely ranging rank, have been carbonized under controlled conditions to 1000 °C, and the reactivity in air at 500 °C of the resulting chars or cokes has been measured by a gravimetric method. The reactivities lie within a well-defined band when plotted against rank of the parent coal. The lower-rank coal chars are more reactive than those prepared from high-rank coals. In extreme cases, the reactivity found for a Montana lignite char is some 100 times as great as that obtained for a char produced from a Pennsylvania low-volatile coal. Variation of reactivity with heat-treatment temperature (600 to 1000 °C) has been studied for three coals. As heat-treatment temperature increases, there is a decrease in reactivity. Some results are reported on the effects which mineral matter and pore structure have on the reactivity parameter. Chars containing high concentrations of magnesium and calcium impurities are most reactive. The amount of macro and transitional porosity in a char has a marked influence on reactivity.