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 .
Inner pore structure of coal char particle was measured by N_2 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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2003年第1期107-111,共5页
CIESC Journal
基金
国家自然科学基金 (No 5 0 1760 14 )
中国节能投资公司联合研究基金资助项目~~
