摘要
煤炭气化过程中产生大量飞灰,其中仍然含有未被利用的炭。以飞灰为前驱体,经浮选脱灰,化学活化制备活性炭。考察了制备条件对活性炭性能的影响。结果表明:①碱炭比升高,总孔容和微孔容积增加,中孔含量降低;②碱炭比越高,比电容越大,但大于2∶1后,比电容没有显著提高;③浮选脱灰的电化学性能得到提高;④在大电流密度下充放电仍然保持较高的比电容并且具有优异的循环使用性能。
The gasification of coal can produce large amounts of fly ash, which still contains untapped charcoal. Fly ash was demineralized by flotation and activated carbons （ACs） were prepared by activation using KOH. The effect of preparation conditions on the performance of ACs was analyzed. The results show that： ① Total pore volume and micropore volume increased with the alkali-carbon ratio, while the content of mesopores decreased; ②The capacitance increased with the alkali-carbon ratio, but become stable after 2： 1; ③The electrochemical performance was improved by demineralizion; ④Activated carbon electrode shows a high capacitance at high current density and excellent cycling performance.
出处
《储能科学与技术》
CAS
2014年第4期353-359,共7页
Energy Storage Science and Technology
基金
国家自然科学基金项目(U1361119)
河南省教育厅自然科学研究计划项目(2011B440006)
河南理工大学博士基金项目(B2010-82)
关键词
飞灰
碱炭比
活性炭
电化学性能
fly ash
alkali-carbon ratio
activated carbon~ electrochemical performance
