地下催化热解对无烟煤焦结构的影响研究  

Impact analysis of anthracite char structure to underground catalytic pyrolysis

作　　者：梁新星[1] 吕俊鑫 舒新前[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《煤炭工程》2018年第1期121-123,127,共4页Coal Engineering

摘　　要：由于地下热解或者气化的原料为几百米甚至千米以下的原始煤层,地面催化法很难直接用于地下催化热解或者气化。文章设计了特殊的地下催化热解法,在卧式热解反应器中使用Ca(OH)_2催化剂对新疆昌吉某无烟煤进行了催化热解实验,获得了催化前后的热解煤焦并对煤焦进行了比表面积、XRD及煤焦气化反应活性测试。实验结果表明:Ca(OH)_2活化了热解煤焦,使比表面迅速增加,孔径分布更加复杂;催化剂加快了煤中有机官能团的热裂解,阻碍了芳香族自由基的热缩聚反应,延缓了热解半焦的有序化与石墨化进度并使煤焦反应活性能力提高。As the coal material for underground pyrolysis and gasification is hundreds even thousands meters below the primitive coalbed,the ground catalytic approach can hardly be used for underground catalytic pyrolysis or gasification. In the paper,we illustrate the special design for the underground catalytic pyrolysis solution that takes catalytic pyrolysis test on the anthracite from Changji,Xinjiang with Ca（OH）2 catalyst in the horizontal pyrolysis reactor,and obtain chars of before and after catalytic processing,and test the specific area,XRD and char gasification reactivity of the char. The test results indicate that Ca（OH）2 activates char pyrolysis, increases specific area rapidly and varies the pore size distribution. Moreover,the catalyst speeds the thermal cracking of organic functional groups in the coal, blocks retrogressive reaction of aromatic free radical,suspends order reaction and graphitization of char pyrolysis,and enhances reactivity of the coal char.

关 键 词：地下催化热解 催化剂 无烟煤 煤焦 

分 类 号：TQ546[化学工程—煤化学工程]