以活性炭为研究对象,采用微波加热-水蒸汽法和碱激发提高活性炭的脱硝效果。通过正交设计与多元非线性回归结合获得最优碱激发活性炭的制备工艺参数。采用扫描电镜、全自动比表面和孔隙分析仪及红外光谱测试最优碱激发活性炭的微观结构、孔结构和表面官能团。结果表明:当微波功率为676W、活化时间为5min和氢氧化钾浓度为48%时,碱激发活性炭具有最佳的脱硝效果,即脱硝穿透时间为343min;最优碱激发活性炭具有良好的孔结构,孔容积与比表面积均大幅提高,平均孔径减小,同时表面官能团减少,吸收峰的强度降低。
With activated carbon as research object,the denitrification effect of activated carbon was improved by microwave heating-steam and alkali-activated method.The preparation parameters of optimal alkali-activated activated carbon were got based on orthogonal design and multivariate nonlinear regression.The micro structure,pore structure and surface functional groups of optimal alkali-activated activated carbon were tested by SEM,BET and FT-IR.The results showed that when microwave power was 676W,activation time was 5 min and potassium hydroxide concentration was 48%,alkali-activated activated carbon had the best denitration effect,such as denitrification penetration time was 343min.The activated carbon had good pore structure and pore volume,the specific surface area increased,the average pore diameter was reduced,at the same time surface functional groups decreased,the strength of absorption peak decreased.
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基金资助
高等学校优秀青年人才基金(2010SQRL034)
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