高温作用对超低灰无烟煤颗粒表面亲/疏水性的影响研究

Effect of high temperature action on surface hydrophilicity/hydrophobicity of ultra-low ash anthracite coal

以无烟煤为研究对象,研究高温作用对其表面性质的影响,采用XPS、SEM和接触角对无烟煤高温作用前后的表面物理化学性质进行分析,并得到高温作用对无烟煤表面亲/疏水性的影响规律。XPS结果表明,无烟煤经高温作用后,其表面疏水性基团含量相对降低,亲水性基团含量相对增加;SEM结果表明,无烟煤经高温作用后,其表面的孔洞和裂隙得到明显增加;接触角结果表明,无烟煤经高温作用后,其接触角明显减小,高温作用降低了无烟煤表面的疏水性。

Taking anthracite coal as object to investigate the effect of high temperature action on surface properties of anthracite coal,the author analyzed surface physicochemical property before and after high temperature function by using XPS,SEM and contact angle measurements,and got rules of effect of high temperature function on surface hydrophilicity/hydrophobicity of anthracite coal.The results of XPS showed that the content of hydrophilic functional groups on coal surface increased but the content of hydrophobic functional groups on coal surface reduced after high temperature function.The results of SEM showed that the holes and cracks on the coal surface significantly increased after high temperature function.The results of contact angle showed that the contact angle significantly decreased and the hydrophobicity of coal surface decreased after high temperature function.