有机硫对维多利亚褐煤液化的催化作用之穆斯堡尔研究

Mossbauer Study of the Effect of Organic Sulphur on the Catalysis of Victorian Brown Coal Liquefaction

我们以Morwell和Coolungoolun两种维多利亚褐煤进行实验,对铁和锡在煤的液化中的催化作用进行了比较,发现锡对低硫的Morwell煤较为有效,而铁则更适合于高硫的Coolungoolun煤。对液化余渣的穆斯堡尔分析的结果,使我们可以用低硫煤中元素态锡的形成以及在高硫煤中磁黄铁矿（Fe_(0.92)S）的形成来对观察到的现象作出解释。硫的损耗数据表明,磁黄铁矿的存在使得煤中的硫转化为气相的量增加了。

The promotion of coal liquefaction by iron and tin has been compared in two Victorian brown coals, Morwell and Coolungoolun. Tin was more effective in the low-sulphur Mouwell coal, whereas iron was better suited to the high-sulphur Coolungoolun coal. 119Sn and 57Fe Mossbauer analyses of the liquefaction residues have led to explanation of these observations in terms of the formation of elemental tin in low-sulphur coal and pyrrhotlte, Fe0.92S, in high-sulphur coal. Sulphur loss data indicated that pyrrhotlte enhances the transfer of sulphur from the coal to the gas phase.