【摘要】 以可再生生物质玉米芯为原料,CO₂为活化剂,制得玉米芯基活性碳（ACs）。通过改变活化温度,进一步研究了ACs的孔隙结构对吸附性能的影响。结果表明:当活化温度为900℃时,ACs可获得最大的比表面积（1 427 m2/g）,总孔容（0. 866 cm3/g）及发达的微孔结构,且ACs对亚甲基蓝的吸附有最大值;而当活化温度为800℃时,ACs具有最高的CO₂吸附值且极微孔含量丰富。ACs对CO₂的吸附能力主要取决于其极微孔含量,而与比表面积没有太大关系。更多还原

【Abstract】 In this work,activated carbons（ACs） were successfully prepared by carbonization and CO₂ activation,with corncob as carbon precursor. The influence of the pore structure on the adsorption performance of corncob-based activated carbons was further studied by changing the activation temperature. The results showed that AC-900 show the maximum specific surface area（1 427 m2/g）,total pore volume（0. 866 cm3/g）,and developed micropore structure when the activation temperature of 900 ℃ . Moreover,AC-900 has the maximum adsorption of methylene blue. The prepared ACs had the highest CO₂ adsorption capacity and the most abundant ultra-micropore structure when the activation temperature was 800 ℃ . The CO₂ adsorption capacity of ACs has strong correlation of the ultra-micropore content,but no connection with the specific surface area.更多还原