Quantitative analysis of transferable hydrogen formed by growth of aromatic cluster during coal pyrolysis

摘要

Plastic property is an important property of coal,from which coal can be divided into caking coal and non-caking coal.The difference of plastic property is mainly reflected in the fact that after the softening temperature,the weak bridge bonds between structural units in coal structure break and form free radical fragments,some of which have relatively low molecular weight,because there is a lot of transferable hydrogen can combine with these free radicals to form stable liquid products in caking coal,while non-caking coal cannot provide enough transferable hydrogen in this process,so its fluidity is weak.This work conducted quantitative analyses of the chemical structure of coke derived from caking and non-caking coal,together with an online gas analysis.As a result,the transferable hydrogen derived from the non-caking coal was partly consumed for decomposition of the functional groups such as ether,while that from the caking coal was little consumed.