桃壳活性炭氨基改性及其对CO_2的吸附性能  

Study of the modification and CO_2 adsorption property of peach activated carbon

作　　者：林小英[1,2] 刘志鹏[1] 余巧莺[1] 江梅[1] 张惠云[2] 林诚[2] 

机构地区：[1]福建工程学院生态环境与城市建设学院,福建福州350118 [2]福州大学石油化工学院,福建福州350116

出　　处：《福建工程学院学报》2016年第1期28-31,共4页Journal of Fujian University of Technology

基　　金：福建省教育厅资助项目(JK2013032);福建省自然科学基金资助项目(2015J01033)

摘　　要：以桃壳活性炭为载体,四乙烯五胺(TEPA)为改性剂,进行直接改性、HNO3氧化后改性,考察改性后活性炭的孔隙特征及其对CO_2的吸附性能。实验表明:改性后,活性炭的比表面积和孔容减小,孔径增大。直接改性后,活性炭对CO_2的吸附性能没有明显增加,HNO_3+TEPA复合改性后,对CO_2的吸附性能显著提高,303 K时,对CO_2的吸附量从改性前的0.39 mmol/g提高到0.73 mmol/g。TEPA的投药量影响复合改性效果,最佳投药量为20%。Porous peach activated carbon（ TAC） was modified directly using tetraethylenepentamine（ TEPA） and HNO3＋ TEPA,and the effect of modification on TAC＇s adsorption of CO2 was investigated. The results show that the specific（ BET） surface areas and pore volumes of TAC decrease after denaturization（ oxidization process）,while the pore diameter of TAC increases. Directly modified TAC by TEPA has no significant effect on CO2 adsorption capability,however,TAC＇s compound modification by HNO3 oxidation plus TEPA has significant effect on CO2 adsorption capability. The CO2 adsorption amount of N-TEPA-TAC measured increases from 0. 39 mmol / g before modification to 0. 73 mmol / g at 303 K. The dosage of TEPA affects TAC＇s modification result with the optimum dosage being 20 % .

关 键 词：桃壳活性炭 四乙烯五胺 CO2吸附 

分 类 号：TQ424.1[化学工程]