【摘要】 用氮气等温吸附 /脱附 ( 77K)方法测量了淮南低变质煤及其在 85 0℃条件下燃烧得到半焦的内部孔隙结构 .通过分析得到有关煤焦颗粒内部孔隙结构的参数及其与燃尽率之间的关系 .由吸附 /脱附曲线判断煤焦孔洞的形状呈多样性 .结合吸附理论 ,认为分形BET和分形Freundlich方程回归得到的分形维数分别表征颗粒内部大中孔表面分形维数和微孔体积分形维数 .发现在燃烧过程中煤焦的表面分形维数及体积分形维数具有不同的变化趋势更多还原

【Abstract】 Inner pore structure of coal char particle was measured by N₂ adsorption-desorption method.It was shown that there was a relationship between combusted ratio and some important parameters of pore structure. Using fractal theory the surface characteristics of inner pore were quantitatively shown by fractal dimensions. Fractal BET and Freundlich equations were used to calculate fractal dimensions of pore surface and particle bulk.Fractal dimensions were found to be related to char combusted ratio. Fractal dimensions of pore surface and particle bulk of Huainan coal chars changed in different trends.更多还原