研究论文
翁斯灏,王杰.微波-化学方法除去原煤无机硫的穆斯堡尔谱研究[J].环境科学学报,1993,13(2):233-239
微波-化学方法除去原煤无机硫的穆斯堡尔谱研究
- M(?)SSBAUER SPECTRUM STUDY OF COAL DESULFU RIZATION WITH MICROWAVE-CHEMICAL TREATMENT
- 摘要：采用17Fe穆斯堡尔谱学方法研究原煤中无机硫的形态和微波-化学方法脱硫的机理和规律.结果表明,煤中无机硫主要以黄铁矿形式存在.低铁硫酸盐则是原煤风化程度的一种表征;微波选择性介质加热,导致煤中黄铁矿与煤组分进行原位热化学反应,产生能溶于稀盐酸的铁硫化合物Fe1-xSx(0<x≤0.125)和FeS;适当增大微波辐照深度,使黄铁矿脱硫反应尽可能进行完全,再用稀盐酸处理,几乎能除尽煤中的无机硫.
- Abstract：Mossbauer effect was used to study the transformation of Fe-S compounds in coal before and after microwave irradiation and chemical treatment. The result for phase analysis shows that pyrite is the dominant form of inorganic-sulfur in the coal investigated, and ferrous sulfate FeSO4 is an indication of weathering. The selective dielectric heating of microwave energy can give rise to thermo-chemical in-situ reactions between pyritic sulfur and the neighboring reactive compounds present in coal,and can convert pyrite which is insoluble in HC1 to pyrrhotite and/or troilite which are soluble in HC1. An increase of the irradiation time followed by a 5% HC1 treatment can remove the majorty of inorganic-sulfur in coal.
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