Abstract
The pyrolysis process of Shendong coal(SD)was first studied by combining the characteristics of thermal gravimetric(TG),pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS)and Gray-King assay(G-K).The results show that the order of coke yields is G-K(76.35％(mass))＞TG(73.11％(mass))＞Py(70.03％(mass)).G-K coke yield caused by condensation reaction and secondary reaction accounts for 3.08％(mass)and 3.24％(mass),respectively.Compared with slow pyrolysis,fast pyrolysis has stronger fracture ability to coal molecules and can obtain more O-compounds,mono-ring aromatics and aliphatics.Especially,the content of phenolics increases significantly from 15.49％to 35.17％,but the content of multi-ring aromatics decreases from 23.13％to 2.36％.By comparing the compositions of Py primary tar and G-K final tar,it is found that secondary reactions occurred during G-K pyrolysis process include the cleavage of alkane and esters,condensation of mono-ring aromatics with low carbon alkene,ring opening,isomerization of tri-ring aromatics,hydrogenation of aromatics and acids.
维普
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