萘在典型介孔碳上的脱附性能研究
发布时间：2018-10-08 18:01
【摘要】：本文基于程序升温脱附(TPD)热重实验对典型多环芳烃,萘,在三种典型介孔碳CMK-3、CMK-5和FDU-15以及传统椰壳活性炭(AC)上的脱附性能进行了研究。采用Kissinger方程预估、Coats-Redfern方程求算、主曲线法校验的组合式热分析方法准确获取了萘在四种吸附剂上的脱附动力学三因子(脱附活化能E_a、指前因子lnA与机理函数)。结果表明,CMK-3、CMK-5和FDU-15对萘的脱附再生性能明显优于椰壳AC,脱附峰值温度排序呈:CMK-5CMK-3≈FDU-15椰壳AC。萘在椰壳AC(E_a=101.5 kJ/mol)上的脱附内扩散阻力最大,CMK-3(E_a=67.0 kJ/mol)居其次,二者均为扩散控速。萘在CMK-5(E_a=58.3 kJ/mol)与FDU-15(Ea=46.5 kJ/mol)上的脱附过程均为反应控速,CMK-5由于微孔较多而E_a较高,但较FDU-15具备更为有序的多类型孔道分布,整体上对萘的脱附性能最佳。
[Abstract]:The desorption properties of typical polycyclic aromatic hydrocarbons (PAHs), naphthalene (Naphthalene), three typical mesoporous carbon (CMK-3,CMK-5) and FDU-15, and traditional coconut shell activated carbon (AC) were studied based on the thermogravimetric test of programmed desorption of (TPD). The Kissinger equation was used to estimate Coats-Redfern equation and the combined thermal analysis method verified by the main curve method was used to accurately obtain the three factors of desorption kinetics of naphthalene on four adsorbents: desorption activation energy (E _ A, preexponential factor lnA and mechanism function). The results show that CMK-3 CMK-5 and FDU-15 can regenerate naphthalene significantly better than coconut shell AC, desorption peak temperature in the order of 10% CMK-5CMK-3 鈮，
本文编号：2257735
[Abstract]:The desorption properties of typical polycyclic aromatic hydrocarbons (PAHs), naphthalene (Naphthalene), three typical mesoporous carbon (CMK-3,CMK-5) and FDU-15, and traditional coconut shell activated carbon (AC) were studied based on the thermogravimetric test of programmed desorption of (TPD). The Kissinger equation was used to estimate Coats-Redfern equation and the combined thermal analysis method verified by the main curve method was used to accurately obtain the three factors of desorption kinetics of naphthalene on four adsorbents: desorption activation energy (E _ A, preexponential factor lnA and mechanism function). The results show that CMK-3 CMK-5 and FDU-15 can regenerate naphthalene significantly better than coconut shell AC, desorption peak temperature in the order of 10% CMK-5CMK-3 鈮，
本文编号：2257735
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