發(fā)布時(shí)間：2018-10-08 18:01

【摘要】：本文基于程序升溫脫附(TPD)熱重實(shí)驗(yàn)對(duì)典型多環(huán)芳烴,萘,在三種典型介孔碳CMK-3、CMK-5和FDU-15以及傳統(tǒng)椰殼活性炭(AC)上的脫附性能進(jìn)行了研究。采用Kissinger方程預(yù)估、Coats-Redfern方程求算、主曲線法校驗(yàn)的組合式熱分析方法準(zhǔn)確獲取了萘在四種吸附劑上的脫附動(dòng)力學(xué)三因子(脫附活化能E_a、指前因子lnA與機(jī)理函數(shù))。結(jié)果表明,CMK-3、CMK-5和FDU-15對(duì)萘的脫附再生性能明顯優(yōu)于椰殼AC,脫附峰值溫度排序呈:CMK-5CMK-3≈FDU-15椰殼AC。萘在椰殼AC(E_a=101.5 kJ/mol)上的脫附內(nèi)擴(kuò)散阻力最大,CMK-3(E_a=67.0 kJ/mol)居其次,二者均為擴(kuò)散控速。萘在CMK-5(E_a=58.3 kJ/mol)與FDU-15(Ea=46.5 kJ/mol)上的脫附過程均為反應(yīng)控速,CMK-5由于微孔較多而E_a較高,但較FDU-15具備更為有序的多類型孔道分布,整體上對(duì)萘的脫附性能最佳。
[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，

本文編號(hào)：2257735