热解条件对淮南煤焦孔隙结构的影响  

EFFECT OF PROLYSIS CONDITION ON THE PORE STRUCTURE OF HUAINAN COAL CHAR

作　　者：李兴龙[1] 许慎启[2] 周志杰[2] 于广锁[2] 

机构地区：[1]江苏索普(集团)有限公司,江苏镇江工程硕士212006 [2]华东理工大学煤气化教育部重点实验室,上海博士生200237

出　　处：《煤炭转化》2009年第4期8-12,共5页Coal Conversion

基　　金：国家重点基础发展计划(973)项目(2004CB217703);教育部新世纪优秀人才支持计划项目(NCET-06-0416);上海市"科技创新行动计划"2008年度社会发展领域重大科技项目(08DZ1200200)

摘　　要：用N2等温吸附(77K)法考察了热解条件对淮南煤焦孔隙结构的影响.测量了淮南原煤、淮南快焦和淮南慢焦的BET比表面积,并由BJH模型计算得到了孔容积、平均孔径及孔径分布.结果表明,快速热解和慢速热解都可以使煤孔隙结构发达,加速孔的生成和发展,且热解温度越高,趋势越明显,但慢速热解对煤焦孔隙结构的影响更加显著.应用分形维数的概念,结合吸附/脱附曲线得到了煤焦的分形维数,结果表明快速热解和慢速热解都可以增加煤焦的分形维数.The effect of pyrolysis condition on pore structure of Huainan coal was investi- gated by N2 adsorption principle at 77 K. Specific surfaces of Huainan coal and char were mea- sured by BET model. Total pore volume, average pore size and pore size distribution were also obtained by BJH model. The results show that rapid pyrolysis and slow pyrolysis both can in- crease the specific area and pore volume and the tendency is more notable with the increase of the pyrolysis temperature. The effect of slow pyrolysis on pore development is stronger than rapid pyrolysis. Fractal theory was applied to describe the surface and pore structure of samples and the fractal dimensions were obtained by FHH equation. Results show that the rapid pyrolysis and slow pyrolysis both can increase the fractal dimension of coal.

关 键 词：BET 孔径分布 吸附/脱附等温线 分形维数 

分 类 号：TQ530[化学工程—煤化学工程]