摘要
为研究和探讨煤主要显微组分结构特征,在基本不破坏煤分子结构的温和条件(40℃)下,用吡啶对平朔气煤三种显微组分进行了抽提。结果表明,三种显微组分的吡啶抽提率大小与其芳香缩聚程度高低顺序相反,即抽提率(％)顺序为:稳定组(14.07)>镜质组(10.17)>丝质组(3.54)。通过对原样和残样进行FTIR和XRD的分析获知,吡啶抽提过程主要是将煤大分子网络结构中的小分子物质如含一CH_2,—CH_3,C—H脂肪侧链、含C—O官能团、含—OH化合物等抽出。吡啶抽提后三种显微组分残样中的芳香结构比例均有增加。
In order to inquire into characters of coal structure in detail, three coal macerals concentrated from Pingshou bituminous were extracted with pyridine solvent at mild condition(40℃).The results indicate that extraction yield in pyridine inverses correlation with aroma- tic condensed degree. The order of percentage extraction is exinite(14.07)>vitrinite(10.17)>fusinite(3.54). FTIR and XRD examination of three parent macerals and their extraction residues show that the low molecular weight material or groups such as aliphatic side chains containing-CH_3, -CH_2 and C-H, functional groups containing C-O or -OH in the macromolecular network of the coal macerals were extracted with pyridine. After pyridine extraction the aromaticity of all of three samples have increased.
出处
《煤炭转化》
CAS
CSCD
北大核心
1992年第2期65-72,共8页
Coal Conversion
关键词
吡啶抽提
显微组分
煤岩
pyridine extraction, coal macerals structure, residue, FTIR, XRD
