烟煤中黄铁矿夹杂物的原位微波化学反应

微波电磁辐射穿透煤颗粒组织，引激颗粒内部黄铁矿夹杂物与其毗邻的有机组分之间的原位微波化学反频，黄铁矿原相转化成磁黄铁矿和陨硫铁新相。Ｍｏｓｓｂａｕｅｒ数据表明，新相配合物中心Ｆｅ＾２＋离子的电子结构，自旋状态，成键性质与内禀磁性较原相均有明显变化。

Exploration on the Mechanism of in-situ Microwave Chemical Reaction of Pyrite Intrinsic in Bituminous Coal

?7Fe Mossbauer spectroscopy was used to study the transformations of pyrite inherent in Yutianbao bituminous coal during microwave irradiation treatment. The phase analyses show that the localized high temperature generated by selective dielectric heating of microwave energy can give rise to in-situ microwave chemical reactions between the pyritic sulfur and other surrounding reactive constituents present in coal, such as bound hydrogen,oxygen, carbon monoxide, and absorbed water, etc, and that the pyrite FeS2 was converted into new phases both pyrrhotite Fe1-xS (0< x< 0.125) and troilite FeS after microwave exposure, accompanying with the changes of electron configuration, spin state intrinsic magnetism, and bond properties of central Fe2+ canons which was surrounded by S2- ligands.