构造煤与原生结构煤的孔隙结构及吸附性差异.pdf

《构造煤与原生结构煤的孔隙结构及吸附性差异.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、2012年9月，第18卷，第3期，528—532页September2012，Vo1．18，No．3，P．528—532构造煤与原生结构煤的孔隙结构及吸附性差异王向浩，王延斌，高莎莎，洪鹏飞，张美娟中国矿业大学(北京)地球科学与测绘工程学院，北京100083摘要：基于晋城和焦作煤样的吸附实验，对比分析了构造煤与原生结构煤的孔隙结构、吸附能力差异及其影响因素。结果表明，与原生结构煤相比，构造煤低温液氮吸附两阶段的拐点相对提前，中值孔径显著偏小，总孔容、微孔一中孔范围内各孔径段孔容以及相应的孔比表面积均要大几到十几倍。构造煤平均孔容具

2、有微孔一小孔>中孔的特点，原生结构煤却呈中孔>小孔一微孔的规律，但两类煤体分段孔比表面积比例却不存在实质性差别。同时，构造煤吸附能力显著强于相同煤级的原生结构煤，原因在于构造煤的吸附孔孔容及相应的孑L比表面积显著较高。此外，构造动力对煤孔隙结构乃至煤吸附性的改造可能涉及与煤大分子结构相关的微孔层次，有关现象和机理值得进一步深入探讨。关键词：构造煤；原生结构煤；孔隙结构；吸附性中图分类号：P618．11文献标识码：A文章编号：1006—7493(2012)03—0528—05oDifferencesinPoreStructuresa

3、ndAbsorptivityabetweenTectonicallyDeformedandUndeformedCoals高ⅡWANGXianghao’WANGYanbin’GAOShasha，HONGPengfei’ZHANGMeijuan’，，，校r【CollegeofGeoscienceandSurveyingEngineering，ChinaUniversityofMining&Technology，Beijing100083，ChinaC也aAbstract：Basedontheadsorptionexperimentof

4、thecoa1samplesfromtheJinchengandJiaozuoareas，thedifferenceand质Ugeologicalcontrolsofporestructureandadsorptivitybetweenthetectonicallydeformedandundeformedcoalswerecomparatively学diSscussed．Itwasfoundthattheturningpointbetweentwoliquidnitrogenadsorptionstagesforthedefor

5、medsamplesmoveforwardcomparingtotheundeformedsamples，indicatingthesmallermediandiameterandthelargervolumeandspecificsurface报areaoftotal，middleandmicro—poresinthedeformedsamples．Tectonicallydeformedcoalshavelargermicro—andsmall—porevolumesandsmallermiddle-porevolume，wh

6、ileundeformedcoalshowlargermiddle—porevolumeandfewersmall—andmicro—porevolume，butthespecificsurfaceareaatvariousporesizespandoesnotexistsubstantialdifferencesbetweentwotypesofthecoals．TheabSOrptivitv0fthedeformedcoalsissignificantlystrongerthanthatofundeformedcoalswit

7、hthesamecoalrankbecausetheabsorptionporevolumeandspecificsurfaceareaofthede~rmedsamplesissignificantlyhigher．Inaddition，itwassuggestedthattheaherationofthetectonicdynamicstotheporestructureandadsorptivityofcoalmayinvolvethemicro—porerelatedtothemacro—molecularstructur

8、eofcoal，whichisworthyoffurtherinvestigation．Keywords：tectonicallydeformedcoal；undeformedcoal；porestructure；absorptivityFirst